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• Wordpress hacked. Disabled hacked site but bad traffic continues [closed]

  - by tetranz

  Possible Duplicate: My server's been hacked EMERGENCY My Ubuntu 10.04 LTS VPS has been hacked, probably via a WordPress site. I was alerted to it when I noticed the incoming traffic was unusually high. A WordPress site was littered with eval(base64_decode(...)) code in lots of files. My fault, I had some files writeable by www-data which shouldn't have been. I've disabled that site (a2dissite ... and restart Apache). This has reduced it but I am still getting some malware type traffic. My server runs several WordPress and Drupal sites and a home grown PHP site. I have captured traffic with tcpdump and looked at it Wireshark. It's reaching out to the login page of some Joomla sites, trying multiple logins. The traffic stops when I stop Apache. If I a2dissite every site and reload (not restart) Apache the traffic continues. At that point I have no virtual hosts running and no DocumentRoot in my apache2.conf so I don't know how Apache is still running something. I have searched the other sites with grep for likely looking php code with no success. I may have missed it but I haven't found anything suspicious in the Apache logs. I have mod-status running. I haven't really seen anything much there except that someone is still trying to do a POST to the theme page on the disabled WordPress site but they now get a 404. What should I be looking for? Are there any tools or whatever which would give me more info about how Apache is generating that traffic? Thanks

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• Creating mdraid device on top of other existing mdraid devices

  - by Dmitriusan

  I'm considering creating something like "hierarchical raid" and wondering whether it is possible using pure mdraid. Moreover, I'm going to boot from this device. I'm using Ubuntu Server 12.04 LTS with Grub2 bootloader. Motivation behind doing that is: I have 4 x 1tb 7200rpm disks. Two are newer and faster (up to 200mb/sec) and other two are slower (up to 140mb/sec). I want to create RAID-0 device from them. When creating such RAID-0 directly from 4 hard disks, I get summary speed up to ~480mb/sec. That is roughly 4*120mb/sec, so RAID-0 works with speed of the slowest device. I have an idea to create a separate RAID-0 md0 device from 500gb partitions of slower hard disks. Theoretically, this md0 device will have speed 2*140=240~280mb/sec. After that, I'm going to add this md0 device to RAID-0 with faster disks, finishing with up to 3*200=600mb/sec. Stripe-width for this raid will be 2x times bigger than for underlying raid with slow disks. Questions are: is it possible or I'm missing something? will that work as expected? can I boot from such consolidated raid device? any better ideas? any pitfalls? I don't want to use fakeraid for consolidating slow disks for multiple reasons (portability, ability to customize parameters and so on). PS Speed is needed for home virtualization server and just for experience/fun. Reliability is provided via regular automatic backups to a separate device. PPS I considered also using different stripe-width for hard disks with different speed in single raid, but mdraid does not seem to support that.

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• Requiring SSH-key Login From Specific IP Ranges

  - by Sean M

  I need to be able to access my server (Ubuntu 8.04 LTS) from remote sites, but I'd like to worry a bit less about password complexity. Thus, I'd like to require that SSH keys be used for login instead of name/password. However, I still have a lot to learn about security, and having already badly broken a test box when I was trying to set this up, I'm acutely aware of the chance of screwing myself while trying to accomplish this. So I have a second goal: I'd like to require that certain IP ranges (e.g. 10.0.0.0/8) may log in with name/password, but everyone else must use an SSH key to log in. How can I satisfy both of these goals? There already exists a very similar question here, but I can't quite figure out how to get to what I want from that information. Current tactic: reading through the PAM documentation (pam_access looks promising) and looking at /etc/ssh/sshd_config. Edit: Alternatively, is there a way to specify that certain users must authenticate with SSH keys, and others may authenticate with name/password? Solution that's currently working: # Globally deny logon via password, only allow SSH-key login. PasswordAuthentication no # But allow connections from the LAN to use passwords. Match Address 192.168.*.* PasswordAuthentication yes The Match Address block can also usefully be a Match User block, answering my secondary question. For now I'm just chalking the failure to parse CIDR addresses up to a quirk of my install, and resolving to try again when I go to Ubuntu 10.04 not too long from now. PAM turns out not to be necessary.

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• Logging hurts MySQL performance - but, why?

  - by jimbo

  I'm quite surprised that I can't see an answer to this anywhere on the site already, nor in the MySQL documentation (section 5.2 seems to have logging otherwise well covered!) If I enable binlogs, I see a small performance hit (subjectively), which is to be expected with a little extra IO -- but when I enable a general query log, I see an enormous performance hit (double the time to run queries, or worse), way in excess of what I see with binlogs. Of course I'm now logging every SELECT as well as every UPDATE/INSERT, but, other daemons record their every request (Apache, Exim) without grinding to a halt. Am I just seeing the effects of being close to a performance "tipping point" when it comes to IO, or is there something fundamentally difficult about logging queries that causes this to happen? I'd love to be able to log all queries to make development easier, but I can't justify the kind of hardware it feels like we'd need to get performance back up with general query logging on. I do, of course, log slow queries, and there's negligible improvement in general usage if I disable this. (All of this is on Ubuntu 10.04 LTS, MySQLd 5.1.49, but research suggests this is a fairly universal issue)

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• nf_conntrack complaints in dmesg

  - by Alexander Gladysh

  While investigating complains on bad HTTP server performance, I've discovered these lines in dmesg of my Xen XCP host that contains a guest OS with said server: [11458852.811070] net_ratelimit: 321 callbacks suppressed [11458852.811075] nf_conntrack: table full, dropping packet. [11458852.819957] nf_conntrack: table full, dropping packet. [11458852.821083] nf_conntrack: table full, dropping packet. [11458852.822195] nf_conntrack: table full, dropping packet. [11458852.824987] nf_conntrack: table full, dropping packet. [11458852.825298] nf_conntrack: table full, dropping packet. [11458852.825891] nf_conntrack: table full, dropping packet. [11458852.826225] nf_conntrack: table full, dropping packet. [11458852.826234] nf_conntrack: table full, dropping packet. [11458852.826814] nf_conntrack: table full, dropping packet. Complains are repeated every five seconds (number of suppressed callbacks is different each time). What can these sympthoms mean? Is that bad? Any hints? (Note that the question is more narrow than "how to solve specific case of bad HTTP server performance", so I do not give more details on that.) Additional info: $ uname -a Linux MYHOST 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise $ cat /proc/sys/net/netfilter/nf_conntrack_max 1548576 The server is under about 10M hits / day load.

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• Ubuntu 12.04 glusterfs volume failed to mount at boot time

  - by user183394

  I have just setup 7 KVM guests, all running Ubuntu 12.04 LTS 64bit Minimal server to test out glusterfs 3.2.5 from the Ubuntu official repo. Two of them form a mirrored pair (i.e. replica 2), and five of them are clients. I am still new to this file system and would like to gain some "hands-on" experience. The setup was mostly uneventful, until I put in the following into each glusterfs client's /etc/fstab: 192.168.122.120:/testvol /var/local/testvol glusterfs defaults,_netdev 0 0, where 192.168.122.120 is the IP address of the first "glusterfs server". If I issue either a manaul mountall or a mount.glusterfs 192.168.122.120:/testvol /var/local/testvol on CLI, a mount shows that the volume is successfully imported. But once a client is rebooted, after it comes back up, the volume is not mounted! I searched the Internet, and found this article, but since I am not running both client and server on the same node, IMHO it's not strictly applicable. So, as a kludgy "get-around", I put in a sleep 3 && mount.glusterfs 192.168.122.120:/testvol /var/local/testvol into each client node's /etc/rc.local. It seems to be able to get the volume mounted on each node, as far as I can tell. But this is quite ugly, and I would appreciate a hint as to how to resolve this glusterfs-non-boot-time-mounting issue correctly. Note that I used the IP address of the first "glusterfs server" although the /etc/hosts of all nodes have been populated with their hostnames. I figured that the use of IP address is more robust. --Zack

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• Nginx Server Block Port 8081 Path to Root Folder

  - by Pamela

  I'm trying to password protect all of port 8081 on my Nginx server. The only thing this port is used for is PhpMyAdmin. When I navigate to https://www.example.com:8081, I successfully get the default Nginx welcome page. However, when I try navigating to the PhpMyAdmin directory, https://www.example.com:8081/phpmyadmin, I get a "404 Not Found" page. Permission for my htpasswd file is set to 644. Here is the code for my server block: server { listen 8081; server_name example.com www.example.com; root /usr/share/phpmyadmin; auth_basic "Restricted Area"; auth_basic_user_file htpasswd; } I have also tried entirely commenting out #root /usr/share/phpmyadmin; However, it doesn't make any difference. Is my problem confined to using the incorrect root path? If so, how can I find the root path for PhpMyAdmin? If it makes any difference, I'm using Ubuntu 14.04.1 LTS with Nginx 1.4.6 and ISPConfig 3.0.5.4p3.

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• ext4 filesystem corruption -- maybe hardware error?

  - by pts

  I'm getting these errors in dmesg after about half an hour after I turn on the computer: [ 1355.677957] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1318420: (comm updatedb.mlocat) bad entry in directory: directory entry across blocks - block=5251700offset=0(0), inode=1802725748, rec_len=179136, name_len=32 [ 1355.677973] Aborting journal on device sda2-8. [ 1355.678101] EXT4-fs (sda2): Remounting filesystem read-only [ 1355.690144] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1318416: (comm updatedb.mlocat) bad entry in directory: directory entry across blocks - block=5251699offset=0(0), inode=2194783952, rec_len=53280, name_len=152 [ 1356.864720] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1312795: (comm updatedb.mlocat) bad entry in directory: directory entry across blocks - block=5251176offset=1460(13748), inode=1432317541, rec_len=208208, name_len=119 /dev/sda is an SSD, and it's using the noop scheduler. /etc/fstab entry: UUID=acb4eefa-48ff-4ee1-bb5f-2dccce7d011f / ext4 errors=remount-ro,noatime,discard,user_xattr 0 1 System information: $ cat /proc/mounts | grep /dev/sd /dev/sda1 /boot ext2 rw,noatime,errors=continue 0 0 $ cat /etc/lsb-release DISTRIB_ID=Ubuntu DISTRIB_RELEASE=10.04 DISTRIB_CODENAME=lucid DISTRIB_DESCRIPTION="Ubuntu 10.04.3 LTS" $ uname -a Linux leetpad 2.6.35-30-generic-pae #61~lucid1-Ubuntu SMP Thu Oct 13 21:14:29 UTC 2011 i686 GNU/Linux I've run memtest for 7 hours, it didn't found any memory errors. Any obvious ideas what can go wrong in this case? The most reasonable thing I can imagine is that the SSD is silently dropping some write requests, which eventually leads to an EXT4 filesystem inconsistency (but no disk I/O errors). How can this happen? Is there a relevant configuration option I should ensure to be set correctly? What tools should I use to diagnose the hardware failures? Would it be possible to diagnose the SSD failure without overwriting data?

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• GlusterFS on VMWare ESXi 5

  - by Dharmavir

  I want to build network file system on top of my VMWare ESXi based virtual nodes which are running Ubuntu 12.04 LTS. I am evalaluating options and found that GlusterFS (http://www.gluster.org/) can turn out to be a good choice. Purpose: I have about 2 dozen VM nodes with different configurations, on 2 physical nodes which has following configuration: 16 core Intel Xeon 1 TB 48 GB RAM Now as I said earlier each Physical server has about 1TB hdd and I can increase if I want additional so for now I have 2TB disk space available, these space is distributed in VM nodes I have created on which about 2 dozen VM nodes live. Now some of them being application server and mgmt server, they have plenty of free disk space which I want to utilize for some heavy storage which I can not design if I do that individually on single VM node. This way if my storage is distributed between dozens of VM nodes and about 2 or more physical nodes I have some sort of backup as well. I do not mind if data gets stored redundently but per my knowledge it might hapeen that individual VM nodes will not be able to store all of the data because complete data size for example if we take 100GB will exceed VM disk size of 70GB and then VM will also have system and program files on it. I need some suggestion that will GlusterFS be the solution for which I am looking forward to or I should go with something like hadoop? I am not too sure. But yes, I would like to utilize my free space on each VM node and while doing that if I get store data redundently I am okay because it will give me data security.

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• How do I make dnsmasq serve IP addresses via IPoIB?

  - by Matt

  I have a cluster farm that I'm setting up. The nodes (computers in the farm) are connected via ethernet & IP over Infiniband. I'm needing to netboot the nodes and thought dnsmasq would fit well as it provides all the features including support for DHCP over IB and it works great for our ethernet setup. However, I can't seem to get it to provide IP addresses to the infiniband adaptors on the nodes. Each node is running an Ubuntu desktop 12.04 LTS. The dnsmasq server is running on ubuntu server 12.04LTS and has the following test config: dhcp-authoritative domain-needed bogus-priv expand-hosts no-hosts domain=local dhcp-range=eth0,10.0.0.10,10.0.0.255,12h dhcp-option=eth0,3,10.0.0.1 dhcp-range=ib0,10.1.1.10,10.1.1.255,12h dhcp-option=ib0,3,10.1.1.1 log-queries log-dhcp IPoIB works between nodes when configured statically but not with dhcp. On the nodes the file /etc/network/interfaces contains auto lo iface lo inet loopback auto ib0 iface ib0 inet dhcp #iface ib0 inet static #address 10.1.1.5 #netmask 255.0.0.0 up echo connected >`find /sys -name mode | grep ib0` Is there something I need to do on the client or server end to make this work?

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• ServerName not working in Apache2 and Ubuntu

  - by CreativeNotice

  Setting up a dev LAMP server and I wish to allow dynamic subdomains, aka ted.servername.com, bob.servername.com. Here's my sites-active file <VirtualHost *:80> # Admin Email, Server Name, Aliases ServerAdmin [email protected] ServerName happyslice.net ServerAlias *.happyslice.net # Index file and Document Root DirectoryIndex index.html DocumentRoot /home/sysadmin/public_html/happyslice.net/public # Custom Log file locations LogLevel warn ErrorLog /home/sysadmin/public_html/happyslice.net/log/error.log CustomLog /home/sysadmin/public_html/happyslice.net/log/access.log combined And here's the output from sudo apache2ctl -S VirtualHost configuration: wildcard NameVirtualHosts and default servers: *:80 is a NameVirtualHost default server happyslice.net (/etc/apache2/sites-enabled/000-default:1) port 80 namevhost happyslice.net (/etc/apache2/sites-enabled/000-default:1) port 80 namevhost happyslice.net (/etc/apache2/sites-enabled/happyslice.net:5) Syntax OK The server hostname is srv.happyslice.net. As you can see from apache2ctl when I use happyslice.net I get the default virtual host, when I use a subdomain, I get the happyslice.net host. So the later is working how I want, but the main url does not. I've tried all kinds of variations here, but it appears that ServerName just isn't being tied to the correct location. Thoughts? I'm stumped. FYI, I'm running Apache2.1 and Ubuntu 10.04 LTS

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• Ubuntu Server: Networking fails with MODPROBE option in /etc/network/interfaces ... ??

  - by neezer

  For some reason (which I haven't been able to determine yet), yesterday morning the networking service on our web server (running Ubuntu 8.04.2 LTS -- hardy) wouldn't start, and our website went down. I noticed the following error message when trying to restart it: * Reconfiguring network interfaces... /etc/network/interfaces:6: option with empty value ifup: couldn't read interfaces file "/etc/network/interfaces" ...fail! Line 6 in the /etc/network/interfaces file concerned a MODPROBE command, which (I believe) loaded in the ip_conntrack_ftp module so that I could use PASV on my FTP server (vsftpd): (breaking modprobe commands commented out below) # Used by ifup(8) and ifdown(8). See the interfaces(5) manpage or # /usr/share/doc/ifupdown/examples for more information. # The loopback network interface auto lo iface lo inet loopback #MODPROBE=/sbin/modprobe #$MODPROBE ip_conntrack_ftp pre-up iptables-restore < /etc/iptables.up.rules # The primary network interface # Uncomment this and configure after the system has booted for the first time auto eth0 iface eth0 inet static address xxx.xxx.xxx.xxx netmask 255.255.255.0 gateway xxx.xxx.xxx.1 dns-nameservers xxx.xxx.xxx.4 xxx.xxx.xxx.5 I've verified that there is a file in /sbin called modprobe. Like I said earlier, this setup had been working flawlessly until yesterday morning (though my bosses say that the site actually went down the previous night at 11 PM EST). Can anyone shed some light on (A) why this broke, and (B) how can I re-enable the ip_conntrack_ftp module?

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• bind9 dlz/mysql at ubuntu segfault libmysqlclient.so

  - by Theos

  I have a big problem. I installed the bind9 nameserver to three different computer. two Ubuntu 10.04.4 LTS, and one Ubuntu 11.10 I compiled it 9.7.0, 9.7.3, 9.9.0 with this method: ./configure --prefix=/usr --sysconfdir=/etc/bind --localstatedir=/var \ --mandir=/usr/share/man --infodir=/usr/share/info \ --enable-threads --enable-largefile --with-libtool --enable-shared --enable-static \ --with-openssl=/usr --with-gssapi=/usr --with-gnu-ld \ --with-dlz-mysql=yes --with-dlz-bdb=no \ --with-dlz-filesystem=yes --with-geoip=/usr make make install After the set up for dlz/mysql, the BIND server is working perfetctly until 5-30 minute long. Ahter i got segfault. I resolve temporaly the problem with a simple process watchdog, and if the named is stopped, the watchdog is restart it, but this is not a good idea in long therm. My log output is: messages: Apr 13 19:33:51 dnsvm kernel: [ 8.088696] eth0: link up Apr 13 19:33:58 WATCHDOG: named not running. Restarting Apr 13 19:35:08 dnsvm kernel: [ 87.082572] named[1027]: segfault at 88 ip b71c4291 sp b5adfe30 error 4 in libmysqlclient.so.16.0.0[b714e000+1aa000] Apr 13 19:35:08 WATCHDOG: named not running. Restarting Apr 13 19:35:08 dnsvm kernel: [ 87.457510] named[1423]: segfault at 68 ip b71d6122 sp b52f0a40 error 4 in libmysqlclient.so.16.0.0[b7160000+1aa000] Apr 13 19:35:09 WATCHDOG: named not running. Restarting Apr 13 19:41:56 dnsvm kernel: [ 494.838206] named[1448]: segfault at 88 ip b731c291 sp b5436e30 error 4 in libmysqlclient.so.16.0.0[b72a6000+1aa000] Apr 13 19:41:57 WATCHDOG: named not running. Restarting Apr 13 19:57:26 dnsvm kernel: [ 1424.023409] named[2976]: segfault at 88 ip b72d1291 sp b6beee30 error 4 in libmysqlclient.so.16.0.0[b725b000+1aa000] Apr 13 19:57:26 WATCHDOG: named not running. Restarting Apr 13 20:11:56 dnsvm kernel: [ 2294.324663] named[6441]: segfault at 88 ip b7357291 sp b6473e30 error 4 in libmysqlclient.so.16.0.0[b72e1000+1aa000] Apr 13 20:11:57 WATCHDOG: named not running. Restarting syslog: http://pastebin.com/hjUyt8gN the first server is a native, normal x64 server (u1004lts), the second is virtualised server (u11.10) the third is also virtualised (10.04lts) This servers is only for dns providing with mysql server db. But the problem is be with all server, and all bind version. named.conf: http://pastebin.com/zwm1yP7V Can anybody help me, or any good idea?

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• Redis 2.0.3 would not let go of deleted appendonly.aof file after BGREWRITEAOF

  - by Alexander Gladysh

  Ubuntu 10.04.2, Redis 2.0.3 (more details at the end of the question). My AOF file for Redis is getting too large, to the point where it soon would threaten to take whole free disk space on my small-HDD VPS box: $ df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda 32G 24G 6.7G 78% / $ ls -la total 3866688 drwxr-xr-x 2 redis redis 4096 2011-03-02 00:11 . drwxr-xr-x 29 root root 4096 2011-01-24 15:58 .. -rw-r----- 1 redis redis 3923246988 2011-03-02 00:14 appendonly.aof -rw-rw---- 1 redis redis 32356467 2011-03-02 00:11 dump.rdb When I run BGREWRITEAOF, the AOF file shrinks, but disk space is not freed: $ ls -la total 95440 drwxr-xr-x 2 redis redis 4096 2011-03-02 00:17 . drwxr-xr-x 29 root root 4096 2011-01-24 15:58 .. -rw-rw---- 1 redis redis 65137639 2011-03-02 00:17 appendonly.aof -rw-rw---- 1 redis redis 32476167 2011-03-02 00:17 dump.rdb $ df -h Filesystem Size Used Avail Use% Mounted on /dev/xvda 32G 24G 6.7G 78% / Sure enough, Redis is still holding the deleted file: $ sudo lsof -p6916 COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME ... redis-ser 6916 redis 7r REG 202,0 3923957317 918129 /var/lib/redis/appendonly.aof (deleted) ... redis-ser 6916 redis 10w REG 202,0 66952615 917507 /var/lib/redis/appendonly.aof ... How can I workaround this issue? I can restart Redis this time, but I would really like to avoid doing this on a regular basis. Note that I can not upgrade to 2.2 (upgrade to 2.0.4 is feasible though). More information on my system: $ lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 10.04.2 LTS Release: 10.04 Codename: lucid $ uname -a Linux my.box 2.6.32.16-linode28 #1 SMP Sun Jul 25 21:32:42 UTC 2010 i686 GNU/Linux $ redis-cli info redis_version:2.0.3 redis_git_sha1:00000000 redis_git_dirty:0 arch_bits:32 multiplexing_api:epoll process_id:6916 uptime_in_seconds:632728 uptime_in_days:7 connected_clients:2 connected_slaves:0 blocked_clients:0 used_memory:65714632 used_memory_human:62.67M changes_since_last_save:8398 bgsave_in_progress:0 last_save_time:1299014574 bgrewriteaof_in_progress:0 total_connections_received:17 total_commands_processed:55748609 expired_keys:0 hash_max_zipmap_entries:64 hash_max_zipmap_value:512 pubsub_channels:0 pubsub_patterns:0 vm_enabled:0 role:master db0:keys=1,expires=0 db1:keys=18,expires=0

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• Mysql Fail to start

  - by John Naegle

  I'm running a Ubuntu 12.04 LTS Virtual Machine. Last week, the VM stopped unexpectedly now mysql will not start on the VM. These two events may be related, they may not be. When I try to connect: $ mysql ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) Then: $ sudo service mysql start start: Job failed to start And $ dmesg [ 1838.218400] type=1400 audit(1374633238.253:50): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=18473 comm="apparmor_parser" [ 1838.358656] init: mysql main process (18477) terminated with status 1 [ 1838.358695] init: mysql main process ended, respawning [ 1839.269303] init: mysql post-start process (18478) terminated with status 1 And $ service mysql status mysql stop/waiting I think this means mysql is crashing when it starts: $ sudo mysqld start 130723 21:51:24 InnoDB: Assertion failure in thread 3064211200 in file fut0lst.ic line 83 InnoDB: Failing assertion: addr.page == FIL_NULL || addr.boffset >= FIL_PAGE_DATA InnoDB: We intentionally generate a memory trap. InnoDB: Submit a detailed bug report to http://bugs.mysql.com. InnoDB: If you get repeated assertion failures or crashes, even InnoDB: immediately after the mysqld startup, there may be InnoDB: corruption in the InnoDB tablespace. Please refer to InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html InnoDB: about forcing recovery. 02:51:24 UTC - mysqld got signal 6 ; Per the manual, I went to the data directory (/var/lib/mysql) and ran this: myisamchk --silent --force */*.MYI Then: $ sudo mysqld ... InnoDB: Your database may be corrupt or you may have copied the InnoDB InnoDB: tablespace but not the InnoDB log files. See InnoDB: http://dev.mysql.com/doc/refman/5.5/en/forcing-innodb-recovery.html InnoDB: for more information. ... Is my database corrupt? What can I do to recover? Re-install mysql? Something less drastic? I'm fine with losing the database, I just want a working system.

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• Unable to get prosody running on Ubuntu 10.04 (lua issues)

  - by user90374

  All this is performed on Ubuntu 10.04.4 LTS Server I installed LUA 5.1.4 following this procedure - http://ubuntuforums.org/showthread.php?t=1874860 I installed prosody following this command (after downloading the package) - sudo dpkg -i prosody_0.8.2-1_i386.deb After installation, I get the following error: I have tried to use as suggested luarock and sudo apt-get install to fix these. But still it keeps showing me these errors. Selecting previously deselected package prosody. (Reading database ... 59416 files and directories currently installed.) Unpacking prosody (from prosody_0.8.2-1_i386.deb) ... Setting up prosody (0.8.2-1) ... * Starting Prosody XMPP Server prosody ************** Prosody was unable to find luaexpat This package can be obtained in the following ways: Source: www[dot]keplerproject[dot]org/luaexpat/ Debian/Ubuntu: sudo apt-get install liblua5.1-expat0 luarocks: luarocks install luaexpat luaexpat is required for Prosody to run, so we will now exit. More help can be found on our website, at prosody[dot]im/doc/depends ************ Prosody was unable to find luasocket This package can be obtained in the following ways: Source: www[dot]tecgraf[dot]puc-rio[dot]br/~diego/professional/luasocket/ Debian/Ubuntu: sudo apt-get install liblua5.1-socket2 luarocks: luarocks install luasocket luasocket is required for Prosody to run, so we will now exit. More help can be found on our website, at prosody[dot]im/doc/depends ************ Prosody was unable to find LuaSec This package can be obtained in the following ways: Source: www[dot]inf[dot]puc-rio[dot]br/~brunoos/luasec/ Debian/Ubuntu: prosody[dot]im/download/start#debian_and_ubuntu luarocks: luarocks install luasec SSL/TLS support will not be available More help can be found on our website, at prosody[dot]im/doc/depends [fail] invoke-rc.d: initscript prosody, action "start" failed. dpkg: error processing prosody (--install): subprocess installed post-installation script returned error exit status 1 Processing triggers for man-db ... Processing triggers for ureadahead ... Errors were encountered while processing: prosody Thanks a lot for your patience and answers.

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• Can't install PHP after apt-get dist-upgrade

  - by WASD42

  I had a server with perfectly running for months classical LAMP installation on Ubuntu 8.04: Linux localhost 2.6.24-23-generic #1 SMP Wed Apr 1 21:47:28 UTC 2009 i686 GNU/Linux DISTRIB_ID=Ubuntu DISTRIB_RELEASE=8.04 DISTRIB_CODENAME=hardy DISTRIB_DESCRIPTION="Ubuntu 8.04.4 LTS" Don't know why I've started apt-get update, apt-get upgrade but everything ended with apt-get dist-upgrade :) Everything gone alright... But now I can't start nor Apache, nor PHP, because PHP was simply deleted. When I'm trying to install it: > apt-get install php5 <...> The following packages have unmet dependencies: php5: Depends: libapache2-mod-php5 (>= 5.2.4-2ubuntu5.17) but it is not going to be installed or php5-cgi (>= 5.2.4-2ubuntu5.17) but it is not going to be installed E: Broken packages When I'm trying to install libapache2-mod-php5: The following packages have unmet dependencies: libapache2-mod-php5: Depends: php5-common (= 5.2.4-2ubuntu5.17) but 5.3.6-6~dotdeb.1 is to be installed E: Broken packages I don't know what 5.3.6-6~dotdeb.1 is and where is this package, because I've already removed dotdeb repository from APT sources :/ Tried to do apt-get update, apt-get upgrade, apt-get install php5 php5-common php5-cli with no success... Don't know what to try next :(

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• ubuntu - Best way of repartitioning a (running) production server

  - by egarcia

  I've got an (externally hosted) production server running Ubuntu LTS. It serves webpages (rails) and has an svn repository accesible through Apache, and a PostgreSQL db. I've got ssh access to the server and root privileges. Most of the "interesting" stuff is located in /var/ : svn repositories are inside /var/svn, web pages under /var/www, etc. Yesterday I was curious about how much disk space had it left, so I did the following: $ df -h Filesystem Size Used Avail Use% Mounted on /dev/md1 950M 402M 500M 45% / varrun 990M 64K 990M 1% /var/run varlock 990M 0 990M 0% /var/lock udev 990M 76K 989M 1% /dev devshm 990M 0 990M 0% /dev/shm /dev/md5 4.7G 668M 4.1G 15% /usr /dev/md6 4.7G 1.4G 3.4G 29% /var /dev/md7 221G 28M 221G 1% /home none 990M 4.0K 990M 1% /tmp My 'var' partition, which holds most of the interesting part, is only 4.7G big. The /home/ partition, on the other hand, is 221G, but it is mostly unused. I should have checked the disk layout before starting installing stuff. Ideally I would need /var/ and /home/ to be "switched" - /home/ should be the one with 4.7G, and /var/ the one with 221G. Is there a way to solve this without having to reinstall the whole thing?

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• Home server hard drive: 186k start-stop cycles in 325 days?

  - by j-g-faustus

  I set up a home server about a year ago, using Ubuntu server (10.04 LTS at the moment), four disks in RAID 5 for storage (WD Green 1.5 TB) and a laptop drive for the OS. Today the output of smartctl, a command line utility for checking the SMART attributes of a hard drive, tells me that the primary OS drive has had no less than 186,000 start-stop cycles in 325 days and may be nearing the end of its lifespan. The smartctl output is in "normalized values", in this case a number between 200 and 000, where 200 is "brand new" and 000 means "worn out". My disk gets 001. So I wonder what happened: 186k start/stop cycles in 7820 hours is about one start/stop per 2.5 minutes around the clock. This seems somewhat excessive for a computer that sees actual use once or twice per day. (The RAID disks are normal, averaging to one start/stop per day, as expected.) Does anyone have similar experiences, or pointers to what might be the issue here? Specifically I'd like to know Why the massive start/stop count? Do I have some sort of configuration issue? Could there be a background service that is causing trouble? Could having a laptop disk as the OS drive be part of the problem? Can anyone confirm or deny this? Here is the /etc/hdparm.conf configuration /dev/sda { apm = 127 spindown_time = 120 } and the most relevant parts of smartctl --attributes /dev/sda: smartctl version 5.38 [x86_64-unknown-linux-gnu] Copyright (C) 2002-8 Bruce Allen === START OF READ SMART DATA SECTION === SMART Attributes Data Structure revision number: 16 Vendor Specific SMART Attributes with Thresholds: ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE 1 Raw_Read_Error_Rate 0x002f 200 200 051 Pre-fail Always - 0 4 Start_Stop_Count 0x0032 001 001 000 Old_age Always - 185875 9 Power_On_Hours 0x0032 090 090 000 Old_age Always - 7820 12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 109 193 Load_Cycle_Count 0x0032 118 118 000 Old_age Always - 246833 194 Temperature_Celsius 0x0022 107 098 000 Old_age Always - 36 As I generally prefer my drives to last more than a year, any advice is appreciated.

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• Enable CPU fan always on

  - by Gundars Meness

  I am using 3 years old overheating laptop and I want my CPU fan to be spinning 24/7 regardless of the consequences. How to make it spin? The problem is that CPU & GPU heats up to 68°C (154 F) right after boot and never goes down, because CPU fan is not spinning full throttle. It starts spinning faster when temperature goes over 70°C and stops when it reaches seventy again. When doing heavy work on databases, it gets from 70 to 90 in no-time and automatically powers off. Bios does not contain any "fan spin 100%" options, just "spin slowly all the time" and "auto" which is more useless than the first one since my fan doesn't have pwm wire. Currently I'm solving this with cooling stand (3x5V), but it isn't much of a help. I would rather use the CPU fan since it is the only fan directly responsible for cooling down CPU/GPU. But how to make it spin 100% all the time? Should I attach it's red power wire to motherboard to get constant 5V (is there such option?), or is there an option to control it via software? Laptop: Samsung R528 2.3 GHz Intel i3 with Nvidia GeForce 310M Bios: Phoenix 03KT.M003.20100622.KSJ (and that is latest update) OS: Ubuntu 12.04.2 LTS with 3.2.0.51 kernel CPU fan: Image/Description Has 5V 0,4A and only 3 pins, no pwm. P.S. Yes, I did clean everything with alcohol, freed the air vents, changed thermal paste etc; that reduced temperature by 4 degrees.

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• Error upgrading Ubuntu server from Intrepid to Jaunty

  - by Martin

  I'm trying to upgrade an old ubuntu server from 8.10 (Intrepid) to 9.04 (Jaunty). But it fails. root@server1:/# do-release-upgrade Checking for a new ubuntu release Failed Upgrade tool signature Failed Upgrade tool Done downloading extracting 'jaunty.tar.gz' Failed to extract Extracting the upgrade failed. There may be a problem with the network or with the server. Does anyone have an idea why I get this error and how to fix it? UPDATE: I think i might have tracked the problem down. My /etc/update-manager/meta-release looks like this: [METARELEASE] URI = http://changelogs.ubuntu.com/meta-release URI_LTS = http://changelogs.ubuntu.com/meta-release-lts URI_UNSTABLE_POSTFIX = -development URI_PROPOSED_POSTFIX = -proposed If i go to http://changelogs.ubuntu.com/meta-release it has this info for Jaunty: Dist: jaunty Name: Jaunty Jackalope Version: 9.04 Date: Thu, 23 Apr 2009 12:00:00 UTC Supported: 0 Description: This is the 9.04 release Release-File: http://archive.ubuntu.com/ubuntu/dists/jaunty/Release ReleaseNotes: http://changelogs.ubuntu.com/EOLReleaseAnnouncement UpgradeTool: http://archive.ubuntu.com/ubuntu/dists/jaunty-proposed/main/dist-upgrader-all/0.111.8/jaunty.tar.gz UpgradeToolSignature: http://archive.ubuntu.com/ubuntu/dists/jaunty-proposed/main/dist-upgrader-all/0.111.8/jaunty.tar.gz.gpg Those links starting with archive.ubuntu.com are broken since jaunty is EOL. I guess i could fix this by copying this file, replacing "archive" with "old-releases", host the modified file somewhere and change the url in the meta-release file. Is this a good solution or will it make me run into worse problems?

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• Spammer relaying via Postfix mail server

  - by Paddington

  I have a Plesk 9.5 mail server (cm.snowbarre.co.za) on Ubuntu 8.04 LTS which forwards all SMTP traffic to an anti-spam server cacti.snowbarre.co.za. Many times I see the headers on the anti-spam server to contain from addresses not hosted on the mail server and I have checked and confirmed that my server is not an open relay server. How can a spammer be using my server to relay spam traffic? How can I stop this? Open relay test: paddington@paddington-MS-7387:~$ telnet cm 25 Trying 196.201.x.x... Connected to cm. Escape character is '^]'. 220 cm.snowbarre.co.za ESMTP Postfix (Ubuntu) mail from:[email protected] 250 2.1.0 Ok rcpt:[email protected] 221 2.7.0 Error: I can break rules, too. Goodbye. Connection closed by foreign host. paddington@paddington-MS-7387:~$ A typical headers is: *Received from cm.snowbarre.co.za (cm.snowbarre.co.za[196.201.x.x]) by cacti.snowbarre.co.za (Postfix) with ESMTPS id 00B601881AD; Mon, 27 Aug 2012 14:03:29 +0200 (SAST) Received from cm.snowbarre.co.za (localhost [127.0.0.1]) by cm.snowbarre.co.za (Postfix) with ESMTP id 81627367E007; Mon, 27 Aug 2012 14:02:50 +0200 (SAST) Received from User (ml82.128.x.x.multilinksg.com [82.128.x.x]) by cm.snowbarre.co.za (Postfix) with ESMTP; Mon, 27 Aug 2012 14:02:49 +0200 (SAST) Reply-To <[email protected]> From "Ms Nkeuri Aguiyi"<[email protected]> Subject Your Unpaid Fund. Date Mon, 27 Aug 2012 05:03:22 -0700 MIME-Version 1.0 Content-Type text/html; charset="Windows-1251" Content-Transfer-Encoding 7bit X-Priority 3 X-MSMail-Priority Normal X-Mailer Microsoft Outlook Express 6.00.2600.0000 X-MimeOLE Produced By Microsoft MimeOLE V6.00.2600.0000 X-Antivirus avast! (VPS 120821-0, 08/21/2012), Outbound message X-Antivirus-Status Clean Message-Id <[email protected]> To undisclosed-recipients:;*

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• Upstart: cannot run as root

  - by Ronni Egeriis

  I have made this upstart script, which starts a Node.js service. But all of the sudden the service has stopped, and upstart has failed to restart it. Now that I am trying to start it manually, it fails to recognize my service: start: Unknown job: queue The script is properly placed in /etc/init, and should have the correct rights: -rw-r--r-- 1 root root 200 Aug 7 13:30 queue.conf When I check the config file with init-checkconf however, it says that it is not able to run as root: root@production1:~# init-checkconf /etc/init/queue.conf ERROR: cannot run as root What causes this error and how do I solve it? Debug info: Ubuntu 12.04.3 LTS root@production1:~# service --version service ver. 0.91-ubuntu1 Edit Here's queue.conf: description "Echo.it command queue" author "Ronni Egeriis Persson <[email protected]>" stop on shutdown respawn respawn 20 5 exec sudo -u beanstalk /usr/bin/node /var/www/queue/index.js >> /var/log/queue.log 2>&1 The command sudo -u beanstalk /usr/bin/node /var/www/queue/index.js >> /var/log/queue.log 2>&1 works fine when run manually.

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• "Error: Unknown error" when trying to start virtual machine from VMware server

  - by slhck

  Problem We are running VMware Server 2.0.0 build-116503 on a Ubuntu 10.04 LTS server. There is a virtual machine installed, running Lotus Domino on Windows Server 2003. Ever since a sudden power failure last week, the virtual machine won't properly start up. When I run the command: vmrun -T server -h https://127.0.0.1:8333/sdk -u root -p jk2x2208 start "[standard] lotus/test.vmx" … after 30 seconds it displays: Error: Unknown error That's about everything I get. I know the command is right, since that's what we've used all the time. This has happened last Saturday after a scheduled backup shutdown, and somehow I was able to start it again. This week, it happened again, and I can't get it back up. Occasionally, I also get: Error: Cannot connect to the virtual machine When I get this, and I run the start command, it seemingly works. Why is this so random? Which configuration could have been messed up? What I've tried / other info I already shut down VMware itself with /etc/init.d/vmware stop. This works. I tried to start VMware again with /etc/init.d/vmware start. It complains that it's "not configured", which is why I had to rm /etc/vmware/not_configured, and then try to start again. There have been no software updates on the machine, and no configuration changes

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• Dependencies problems installing openjdk on Ubuntu

  - by Rodnower

  I try to install openjdk-7-jre: sudo apt-get install openjdk-7-jre But I have dependencies problems: Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: openjdk-7-jre : Depends: openjdk-7-jre-headless (= 7u7-2.3.2a-0ubuntu0.12.04.1) but it is not going to be installed Depends: libgif4 (>= 4.1.4) but it is not installable Depends: libatk-wrapper-java-jni (>= 0.30.4-0ubuntu2) but it is not installable Recommends: libgnome2-0 but it is not installable Recommends: libgnomevfs2-0 but it is not going to be installed Recommends: ttf-dejavu-extra but it is not installable E: Unable to correct problems, you have held broken packages. This is version of Ubuntu: Ubuntu 12.04.1 LTS I completely don't know how resolve dependencies... Some one can help me? Thank you for ahead.

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