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  • Excluding child processes from ps

    - by stefpet
    Background: To reload app configuration I need to kill -HUP the parent processes' PIDs. To find PIDs I currently use ps auxf | grep gunicorn with the following example output: $ ps auxf | grep gunicorn stpe 4222 0.0 0.2 64524 11668 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4225 0.0 0.4 76920 16332 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4226 0.0 0.4 76932 16340 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4227 0.0 0.4 76940 16344 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4228 0.0 0.4 76948 16344 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4229 0.0 0.4 76960 16356 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4230 0.0 0.4 76972 16368 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4231 0.0 0.4 78856 18644 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 4232 0.0 0.4 76992 16376 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 5685 0.0 0.0 22076 908 pts/1 S+ 11:50 0:00 | \_ grep --color=auto gunicorn stpe 5012 0.0 0.2 64512 11656 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5021 0.0 0.4 77656 17156 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5022 0.0 0.4 77664 17156 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5023 0.0 0.4 77672 17164 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5024 0.0 0.4 77684 17196 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5025 0.0 0.4 77692 17200 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5026 0.0 0.4 77700 17208 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5027 0.0 0.4 77712 17220 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py stpe 5028 0.0 0.4 77720 17220 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py Based on the above I see that it is 4222 and 5012 I need to HUP. Question: How can I exclude the child processes and only get the parent process (please note however that the processes I want do also have a parent (e.g. bash) that I'm uninterested with)? Using a regexp with grep on how much indentation there is in the ascii tree feels dirty. Is there a better way? Example: The desired output would be something like this. stpe 4222 0.0 0.2 64524 11668 pts/2 S+ 11:01 0:00 | \_ /usr/bin/python /usr/local/bin/gunicorn app_api:app -c app_api.ini.py stpe 5012 0.0 0.2 64512 11656 pts/3 S+ 11:22 0:00 \_ /usr/bin/python /usr/local/bin/gunicorn app_game_api:app -c app_game_api.ini.py This would be easily parseable to be able to automatically find the PIDs in a script that does the HUPing which is the goal.

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  • Getting VSFTP running on Fedora 14

    - by Louis W
    Having troubles getting VSFTPD running on Fedora 14. Here is what I have done so far, please let me know if I am missing something. When I try to connect through FTP it says connection time out. Installed VSFTP with yum yum install vsftpd Edited config file vi /etc/vsftpd/vsftpd.conf Started service and made sure it would always start up service vsftpd start chkconfig vsftpd on Added and configured a new user /usr/sbin/useradd upload /usr/bin/passwd upload usermod -c "This user cannot login to a shell" -s /sbin/nologin upload Added firewall rules iptables -A INPUT -p tcp --dport 21 -j ACCEPT iptables -A OUTPUT -p tcp --sport 20 -j ACCEPT service iptables save service iptables restart Checked netstat (In reply to comment below) tcp 0 0 0.0.0.0:21 0.0.0.0:* LISTEN 23752/vsftpd

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  • Cannot connect to postgres installed on Ubuntu

    - by Assaf
    I installed the Bitnami Django stack which included PostgreSQL 8.4. When I run psql -U postgres I get the following error: psql: could not connect to server: No such file or directory Is the server running locally and accepting connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"? PG is definitely running and the pg_hba.conf file looks like this: # TYPE DATABASE USER CIDR-ADDRESS METHOD # "local" is for Unix domain socket connections only local all all md5 # IPv4 local connections: host all all 127.0.0.1/32 md5 # IPv6 local connections: host all all ::1/128 md5 What gives? "Proof" that pg is running: root@assaf-desktop:/home/assaf# ps axf | grep postgres 14338 ? S 0:00 /opt/djangostack-1.3-0/postgresql/bin/postgres -D /opt/djangostack-1.3-0/postgresql/data -p 5432 14347 ? Ss 0:00 \_ postgres: writer process 14348 ? Ss 0:00 \_ postgres: wal writer process 14349 ? Ss 0:00 \_ postgres: autovacuum launcher process 14350 ? Ss 0:00 \_ postgres: stats collector process 15139 pts/1 S+ 0:00 \_ grep --color=auto postgres root@assaf-desktop:/home/assaf# netstat -nltp | grep 5432 tcp 0 0 127.0.0.1:5432 0.0.0.0:* LISTEN 14338/postgres tcp6 0 0 ::1:5432 :::* LISTEN 14338/postgres root@assaf-desktop:/home/assaf#

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  • Serve up PC hard drive as USB mass storage

    - by sheepsimulator
    Is there a software package available that can serve up a hard-drive internal to a PC and make it available over USB to other USB Master nodes as mass storage? Ex: take your C: or /dev/hda drive on a PC (let's call the computer PC-A), and run a driver program which makes your C: or /dev/hda drive available to external devices as USB mass storage. When you'd hook up another PC (PC-B) to PC-A via USB, it would detect a USB mass storage device, which is C: or /dev/hda on PC-A. Is this even possible? EDIT: I know that there are other ways of making data on a drive available between two different computers (eg. putting PC-A's hdd in a USB-drive-enclosure, or having PC-A make the hdd available via a network share). But I'd like to know if the method that I describe above is even technically possible.

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  • Using curl -s in *nix command line not working for some reason

    - by JM4
    I am trying to install composer (though to be honest I really have no idea how it fully works and documentation seems to be quite poor) on my MediaTemple DV machine. I am using their [instructions][1] Trying to install globally using: $ curl -s https://getcomposer.org/installer | php My command line (again using putty and logged into my server as root) thinks for a second, then sets up for next prompt. I run a simple ls -l to check for the file it should have downloaded with no luck. Any idea what could be causing the issue? I have tested and do in fact have curl installed. UPDATE 1 Based on the first answer, the verbose response is: > $ curl -vs https://getcomposer.org/installer | php > * About to connect() to getcomposer.org port 443 > * Trying 37.59.4.156... connected > * Connected to getcomposer.org (37.59.4.156) port 443 > * successfully set certificate verify locations: > * CAfile: /etc/pki/tls/certs/ca-bundle.crt CApath: none > * SSLv2, Client hello (1): SSLv3, TLS handshake, Server hello (2): SSLv3, TLS handshake, CERT (11): SSLv3, TLS handshake, Server key > exchange (12): SSLv3, TLS handshake, Server finished (14): SSLv3, TLS > handshake, Client key exchange (16): SSLv3, TLS change cipher, Client > hello (1): SSLv3, TLS handshake, Finished (20): SSLv3, TLS change > cipher, Client hello (1): SSLv3, TLS handshake, Finished (20): SSL > connection using DHE-RSA-AES256-SHA > * Server certificate: > * subject: /C=CH/CN=dl.packagist.org/[email protected] > * start date: 2012-07-07 23:25:35 GMT > * expire date: 2013-07-10 02:55:12 GMT > * SSL: certificate subject name 'dl.packagist.org' does not match target host name 'getcomposer.org' > * Closing connection #0 > * SSLv3, TLS alert, Client hello (1): > > > [1]: http://getcomposer.org/doc/00-intro.md

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  • Bootable GRUB partition

    - by MA1
    I have a customized live fedora 12 USB which is working fine. What i want to do is to make a partition of my hard disk bootable so that my customized fedora can be run from hard disk. To accomplish this i did the following steps: Created a primary partition(/dev/sda2) and format it as ext3 and set it as active. Copy all the files in the live usb to /dev/sda2. Following are the live usb contents(all directories): a. boot b. EFI c. LiveOS d. syslinux Then i installed the GRUB in boot/grub Created the grub.conf in boot/grub Following are the contents of each directory in the USB: syslinux/ boot.cat isolinux.bin splash.jpg vesamenu.c32 initrd0.img ldlinux.sys syslinux.cfg vmlinuz0 LiveOS/ livecd-iso-to-disk osmin.img squashfs.img EFI/ boot/ boot.conf grub.conf boot.efi bootia32.conf bootia32.efi splash.jpg splash.xpm.gz vesamenu.c32 initrd0.img isolinux.bin isolinux.cfg vmlinuz0 boot/grub/ core GRUB files grub.conf olpc.fth Following are contents of grub.conf default=0 splashimage=/EFI/boot/splash.xpm.gz timeout 2 hiddenmenu title funLinux kernel /EFI/boot/vmlinuz0 root=live:LABEL=myFun rootfstype=auto ro liveimg quiet ssb.blacklist=1 selinux=0 vga=normal nomodeset rhgb initrd /EFI/boot/initrd0.img Now when i try to boot from the hard disk it shows the grub menu and fedora starting to load but during loading it said No root device found Boot has failed, sleeping forever So, where is the problem? what i am doing wrong?

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  • Home server - HP Proliant Microserver - Software and setup - OS on USB stick?

    - by Lloyd Watkin
    I've just purchased a HP ProLiant Microserver for home use. I want to set up with web server, samba shares, the usual stuff. My question is really about system setup. It has an internal USB socket so I've attempted to install a copy of Fedora 14 onto it. I turned off X/Gnome, but it still ran like a pig. I've now put the OS on one of the internal disks (250Gb, 7200rpm), but I was wondering if there was a way to utilise the internal USB to give me better power-saving allowing the hard drives to be shut down when not in use. How would you set this server up? I'd rather not go to the extra cost of an SSD right now, but if that's the best way then so be it.

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  • Can a faulty DNS record prevent networking?

    - by Bob
    My server's network interfaces are not available anymore since yesterday evening. I didn't change anything, but I added a new DNS-record shortly before. Unfortunately, the web interface I used to add this DNS record escaped some characters, so I've got a faulty DNS record: example.com 86400 IN TXT "\"v=spf1 mx a -all\"" However, this is the only unusual thing I could notice about this. Is it possible that the \-characters in my DNS record are confusing for some routers? Or could it be the system itself which is confused by this (it's a Debian Lenny system). Unfortunately, I can't quick-test it because of the long TTL of the record.

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  • gitolite post commit hook to update redmine's repository

    - by eliocs
    Hello, I currently have a ubuntu server machine which has gitolite and redmine installed. Redmine accesses repository copies which are updated using a cron task. Having a cron task to pull the updates seems like an overkill is there anyway a gitolite post-commit script could execute a pull as the redmine user. My current update script looks like this: */15 * * * * redmine cd /home/redmine/repositories/support && git pull The post-commit script I guess should be similar, how can I give the gitolite user the privileges to execute the pull as the redmine user? Thanks in advance. p.s: don't have enough reputation to create de gitolite tag.

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  • How can OpenGL graphics be displayed remotely using VNC?

    - by Jared Brown
    I am attempting to run a program that uses OpenGL to render a model in a viewport through VNC unsuccessfully. The error message I receive is - Xlib: extension "GLX" missing on display ":1.0". It was my understanding that VNC can be configured to render all graphics remotely and send a compressed screen grab from the display buffer to the local client. This would seem to negate the need for GLX extensions on the local client. Can VNC be configured this way and could you briefly describe how? Remote host: vncserver on RHEL 5 Local client: UltraVNC on Windows XP

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  • How to add a new entry to fstab?

    - by Roei
    I mount a device mount /dev/xvdf /mnt/mongo and verify the mount using df-h: Filesystem Size Used Avail Use% Mounted on /dev/xvda1 7.9G 955M 6.9G 12% / tmpfs 299M 44K 299M 1% /dev/shm /dev/xvdf 20G 589M 19G 4% /mnt/mongo But now I'm trying to figure out how to make it auto mount on boot. I understand I need to add a new entry to /etc/fstab, so I perform: $ sed -i '$ a\/dev/xvdf /mnt/mongo xfs defaults 1 1' /etc/fstab But, after reboot, it seems that the auto mount didn't work. The device didn't appear in the df -h list. Should I not use the sed to add the entry? Is the entry I entered incorrect?

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  • Control-Backspace (unix-kill-rubout) for readline?

    - by Xepoch
    In readline(3) I should be able to map Control-Backspace to the same function as Control-W (unix-kill-rubout). Regardless of what I put in ~/.inputrc I'm unable to get this to be recognized. \C-\b: unix-kill-rubout ...for instance does not work. Can I map Control-Backspace to the unix-kill-rubout in readline?

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  • Accidentally replaced the partition table using GParted in UBUNTU

    - by claws
    Hello, This machine has UBUNTU & wINDOWS XP. I'm currently logged into UBUNTU. I was just checking the features of GParted and accidentally clicked Device > Create Partition Table. A default MS-DOS partition table is created. Now if I re-start the Gparted there is nothing. Its showing entire disk as UNALLOCATED space. Lucky thing is All the drives (C:, D:, E:) are currently mounted and I'm in UBUNTU. I guess its possible to re-create the partition table using current status. But I don't know how? Can any one kindly tell me how to do this. This is a lab computer. If its not recoverable. I'm completely screwed!!

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  • How many users are "many users"?

    - by kemp
    I need to find a solution for a website which is struggling under load. The site gets ~500 simultaneous connections during peak time, and counts around 42k hits per day. It's a wordpress based site bridged with a vbulletin forum with a lot of contents and a fairly complex structure which makes intensive use of the database. I already implemented code level full page caching (without this the server just crashes), and configured all other caching directives as well as combining css files and the like to limit http requests as much as possible. I need to understand if there is more that can be done via software or if the load is just too much for the server to handle and it needs to be upgraded, because the server goes down occasionally during peak times. Can't access the server now, but it's a dedicated CentOS machine (I think 4GB ram, can't say what CPU) running apache/mysql. So back to the main question: how can I know when the users are just too many?

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  • How to drop all subnets outside of the US using iptables

    - by Jim
    I want to block all subnets outside the US. I've made a script that has all of the US subnets in it. I want to disallow or DROP all but my list. Can someone give me an example of how I can start by denying everything? This is the output from -L Chain INPUT (policy DROP) target prot opt source destination ACCEPT all -- anywhere anywhere ACCEPT all -- anywhere anywhere state RELATED,ESTABLISHED ACCEPT tcp -- anywhere anywhere tcp dpt:ftp state NEW DROP icmp -- anywhere anywhere Chain FORWARD (policy DROP) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination And these are the rules iptables --F iptables --policy INPUT DROP iptables --policy FORWARD DROP iptables --policy OUTPUT ACCEPT iptables -A INPUT -i lo -j ACCEPT iptables -A INPUT -i eth0 -m state --state ESTABLISHED,RELATED -j ACCEPT iptables -A INPUT -p tcp -i eth0 --dport 21 -m state --state NEW -j ACCEPT iptables -A INPUT -p icmp -j DROP Just for clarity, with these rules, I can still connect to port 21 without my subnet list. I want to block ALL subnets and just open those inside the US.

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  • Postfix smtp error 450 (failed to add recipient)

    - by culter
    I have debian server with postfix and roundcube. After an attack we are on 2 blacklists, but I don't think that this is the main problem. I can't send mail to any address. I tried to find the cause...I checked var/spool/postfix/etc/resolv.conf and resolv.etc and they're the same with this content: nameserver 127.0.0.1 nameserver localhost In var/log/mail.err I found: cyrus/imap[25452]: DBERROR: opening /var/lib/cyrus/user/m/[email protected]: cyrusdb error cyrus/imap[25452]: DBERROR: skiplist recovery /var/lib/cyrus/user/m/[email protected]: ADD at 1FC0 exists When I try to send email from roundcube, I get the message from title. When I send it within opera or any other mail client, It gives nothing, but email is'nt sended. Thank you for any advice.

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  • bash script with permanent ssh connection

    - by samuelf
    I use a bash script which runs /usr/bin/ssh -f -N -T -L8888:127.0.0.1:3306 [email protected] However, when I run the bash script, it waits.. I see the connection coming up but the script doesn't exit.. it's like it's waiting for the SSH process to finish, because when I manually kill it the bash script finishes as well. Any ideas how to resolve this? UPDATE: I have croned this script.. and the cron process is the one that becomes a zombie.. the actual scripts runs just fine, sorry about that, with ps -auxf I get: root 597 0.0 0.7 2372 912 ? Ss Jul12 0:00 cron root 2595 0.0 0.8 2552 1064 ? S 02:09 0:00 \_ CRON 1001 2597 0.0 0.0 0 0 ? Zs 02:09 0:00 \_ [sh] <defunct> 1001 2603 0.0 0.0 0 0 ? Z 02:09 0:00 \_ [cron] <defunct> and when I kill the ssh the defuncts disappear.. why would they become defunct?

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  • How do hdparm's -S and -B options interact?

    - by user697683
    These two options seem confusing. For example: according to the man page -B 254 "does not permit spin-down". However, testing with -B 254 -S 1 the drive does spin down after 5 seconds. -B Query/set Advanced Power Management feature, if the drive supports it. A low value means aggressive power management and a high value means better performance. Possible settings range from values 1 through 127 (which permit spin-down), and values 128 through 254 (which do not permit spin-down). The highest degree of power management is attained with a setting of 1, and the highest I/O performance with a setting of 254. A value of 255 tells hdparm to disable Advanced Power Management altogether on the drive (not all drives support disabling it, but most do). -S Put the drive into idle (low-power) mode, and also set the standby (spindown) timeout for the drive. This timeout value is used by the drive to determine how long to wait (with no disk activity) before turning off the spindle motor to save power. Under such circumstances, the drive may take as long as 30 seconds to respond to a subsequent disk access, though most drives are much quicker. The encoding of the timeout value is somewhat peculiar. A value of zero means "timeouts are disabled": the device will not automatically enter standby mode. Values from 1 to 240 specify multiples of 5 seconds, yielding timeouts from 5 seconds to 20 minutes. Values from 241 to 251 specify from 1 to 11 units of 30 minutes, yielding timeouts from 30 minutes to 5.5 hours. A value of 252 signifies a timeout of 21 minutes. A value of 253 sets a vendor-defined timeout period between 8 and 12 hours, and the value 254 is reserved. 255 is interpreted as 21 minutes plus 15 seconds. Note that some older drives may have very different interpretations of these values.

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  • CentOS tftp server is broken

    - by Mike Pennington
    I'm trying to run tftpd from xinetd on CentOS 6; however, I can only tftp from localhost. I have a file in /opt/tftpboot/fw.test.conf that I can retrieve if I tftp to localhost: [mpenning@localhost ~]$ tftp localhost tftp> get fw.test.conf tftp> quit [mpenning@localhost ~]$ ls fw.test.conf [mpenning@localhost ~]$ However, I cannot receive this file if I tftp to eth1 on this server (the address on eth1 is 172.16.1.4). [mpenning@localhost ~]$ sudo tshark -i eth1 udp and host 172.16.1.5 Running as user "root" and group "root". This could be dangerous. Capturing on eth1 0.000000 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 5.000133 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 10.000184 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 15.000297 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 20.000331 172.16.1.5 -> 172.16.1.4 TFTP Read Request, File: fw.test.conf\000, Transfer type: netascii\000 ^C5 packets captured [mpenning@localhost ~]$ I have the following xinetd configuration: [root@localhost mpenning]# cat /etc/xinetd.d/tftp # default: off # description: The tftp server serves files using the trivial file transfer \ # protocol. The tftp protocol is often used to boot diskless \ # workstations, download configuration files to network-aware printers, \ # and to start the installation process for some operating systems. service tftp { socket_type = dgram protocol = udp wait = yes user = root server = /usr/sbin/in.tftpd server_args = -s /opt/tftpboot disable = no per_source = 11 cps = 100 2 flags = IPv4 } [root@localhost mpenning]#

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  • Refresh devices - reconnect CF card drive by script (unplug-plug equivalent)

    - by Chris
    Hello I plug a completely clean CF-card into my USB card-writer. Then I dd a mbr block of 512 bytes size to the device, which contains the partition table and the definition of one partition. Problem: While "fdisk -l /dev/sdx" correctly displays the partition, it happens that there is no device like "/dev/sdx1" after these operations (as it was not present before). Unplugging and plugging the card-writer solves the problem and makes the device(s) appear. Since I use this procedure in a script, manually unplugging and re-plugging is no option whatsoever. Is there a way to "refresh" the devices or to "unplug and re-plug" the drive by script such that /dev/sdx1 appears? Thanks for any help, Chris

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  • Can someone explain the "use-cases" for the default munin graphs?

    - by exhuma
    When installing munin, it activates a default set of plugins (at least on ubuntu). Alternatively, you can simply run munin-node-configure to figure out which plugins are supported on your system. Most of these plugins plot straight-forward data. My question is not to explain the nature of the data (well... maybe for some) but what is it that you look for in these graphs? It is easy to install munin and see fancy graphs. But having the graphs and not being able to "read" them renders them totally useless. I am going to list standard plugins which are enabled by default on my system. So it's going to be a long list. For completeness, I am also going to list plugins which I think to understand and give a short explanation as to what I think it's used for. Pleas correct if I am wrong with any of them. So let me split this questions in three parts: Plugins where I don't even understand the data Plugins where I understand the data but don't know what I should look out for Plugins which I think to understand Plugins where I don't even understand the data These may contain questions that are not necessarily aimed at munin alone. Not understanding the data usually mean a gap in fundamental knowledge on operating systems/hardware.... ;) Feel free to respond with a "giyf" answer. These are plugins where I can only guess what's going on... I hardly want to look at these "guessing"... Disk IOs per device (IOs/second)What's an IO. I know it stands for input/output. But that's as far as it goes. Disk latency per device (Average IO wait)Not a clue what an "IO wait" is... IO Service TimeThis one is a huge mess, and it's near impossible to see something in the graph at all. Plugins where I understand the data but don't know what I should look out for IOStat (blocks/second read/written)I assume, the thing to look out for in here are spikes? Which would mean that the device is in heavy use? Available entropy (bytes)I assume that this is important for random number generation? Why would I graph this? So far the value has always been near constant. VMStat (running/I/O sleep processes)What's the difference between this one and the "processes" graph? Both show running/sleeping processes, whereas the "Processes" graph seems to have more details. Disk throughput per device (bytes/second read/written) What's thedifference between this one and the "IOStat" graph? inode table usageWhat should I look for in this graph? Plugins which I think to understand I'll be guessing some things here... correct me if I am wrong. Disk usage in percent (percent)How much disk space is used/remaining. As this is approaching 100%, you should consider cleaning up or extend the partition. This is extremely important for the root partition. Firewall Throughput (packets/second)The number of packets passing through the firewall. If this is spiking for a longer period of time, it could be a sign of a DOS attack (or we are simply recieving a large file). It can also give you an idea about your firewall performance. If it's levelling out and you need more "power" you should consider load balancing. If it's levelling out and see a correlation with your CPU load, it could also mean that your hardware is not fast enough. Correlations with disk usage could point to excessive LOG targets in you FW config. eth0 errors (packets in/out)Network errors. If this value is increasing, it could be a sign of faulty hardware. eth0 traffic (bits/second in/out)Raw network traffic. This should correlate with Firewall throughput. number of threadsAn ever-increasing value might point to a process not properly closing threads. Investigate! processesBreakdown of active processes (including sleeping). A quick spike in here might point to a fork-bomb. A slowly, but ever-increasing value might point to an application spawning sub-processes but not properly closing them. Investigate using ps faux. process priorityThis shows the distribution of process priorities. Having only high-priority processes is not of much use. Consider de-prioritizing some. cpu usageFairly straight-forward. If this is spiking, you may have an attack going on, or a process is hogging the CPU. Idf it's slowly increasing and approaching max in normal operations, you should consider upgrading your hardware (or load-balancing). file table usageNumber of actively open files. If this is reaching max, you may have a process opening, but not properly releasing files. load averageShows an summarized value for the system load. Should correlate with CPU usage. Increasing values can come from a number of sources. Look for correlations with other graphs. memory usageA graphical representation of you memory. As long as you have a lot of unused+cache+buffers you are fine. swap in/outShows the activity on your swap partition. This should always be 0. If you see activity on this, you should add more memory to your machine!

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  • mv ,,, to * ???

    - by thedp
    I tried something on my vm ubuntu and managed to mess it up... luckily I made a snapshot not too long a go. I renamed a file to ,,, and tried to mv ,,, *. The entire dir's content of the dir disappeared. Can someone please explain to me what happened? Thank you.

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