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  • GNU screen - Unable to reattach to screen after lost connection

    - by subhashish
    I was using irssi in screen but lost connection. After I ssh'd back in to the server, I can no longer attach to that screen. screen -ls shows that the screen is already attached. I tried screen -D to force detach it, and it said detach but screen -ls still says it's attached. I tried screen -x and it just hangs there. [sub@server ~]$ screen -ls There are screens on: 4033.poe (Detached) 7728.irssi (Attached) 2 Sockets in /var/run/screen/S-sub. What can I do now?

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  • Diagnosing SAN connectivity issues (RHEL5)

    - by Matthew
    We are currently utilizing GFS2 to share a SAN LUN between 3 servers. However due to a feature problem with vendor software we are using, we currently have the volume unmounted on two of the boxes, and are instead exporting the GFS2 filesystem via NFS from the first one (the software requires some weird locking mechanics that GFS2 doesn't support). As of this morning, NFS was no longer able to read/write to the volume from any of the servers, including the NFS server. I then tried checking the normal mount (the directory that is exported on the NFS server) and I received a weird input/output error just trying to CD into it. When I tried running multipath, I got a DM error, however multipath -l worked just fine. I tried unmounting the GFS2 volume, and the CLI hung. I ran init 0 which killed most services, but then the shutdown appeared to have been hung. I logged in via out of band access (hp ILO) and saw that the shutdown was hung trying to unmount GFS2 volumes. My main priority was getting the box back online so after about 5 minutes of waiting I did a hard reset. I am now trying to figure out what went wrong. What are the correct logs to investigate? I've never run into SAN issues like this before. The SAN is connected via 2 fibre connections. Any help would really be appreciated. Everything appears to be up and functional now.

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  • VMXNET3 nic loses the ability to update ARP table after N hours

    - by Peter
    I have a fedora 18 VM that stops updating the arp table on eth1 after running for a number of hours to days. There are other VMs on the same hypervisor that can access all of the same networks without issue. A tcpdump of the offending NIC shows only ARP broadcasts but no responses. None of the other VMs on the vDS see the ARP broadcasts from the offending NIC. The only way I can currently solve the problem is to reboot the VM and then everything works for a while. I've tried changing the port on the vDS and even flipping the network configurations after I lose eth1's ARP table, but the ARP problem follows eth1 but I can access the machines that were originally on eth1. If I statically add the arp entries for machines on the same subnet I have no problems with connectivity. The Hypervisor is an HP BL49X series with flex-10 network modules. Has anyone seen anything like this before?

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  • iptables dos limit for all ports

    - by user973917
    I know how to use limit conntrack option to allow for DoS protection. However, I want to add a protection to limit no more than say 50 connections for each port. How can I do this? Basically, I want to make sure that each port can have no more than 50 connections, rather than globally applying 50 connections (which is what #2 does I believe?) Would I do something like: iptables -A INPUT --dport 1:65535 -m limit --limit 50/minute --limit-burst 50 -j ACCEPT or iptables -A INPUT -m limit --limit 50/minute --limit-burst 50 -j ACCEPT

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  • How can I repair my USB drive?

    - by yurko
    USB drive is in read only state and I can't repair it. First of all I tried erase it using dd: root@yurko-laptop:/home/yurko-laptop# ls -l /dev/disk/by-id | grep usb lrwxrwxrwx 1 root root 9 ??? 18 23:45 usb-Generic_Flash_Disk_C173828A-0:0 -> ../../sdb lrwxrwxrwx 1 root root 10 ??? 18 23:45 usb-Generic_Flash_Disk_C173828A-0:0-part1 -> ../../sdb1 root@yurko-laptop:/home/yurko-laptop# dd if=/dev/zero of=/dev/sdb dd: ?????? ? «/dev/sdb»: ?? ?????????? ????????? ????? 8257537+0 ??????? ??????? 8257536+0 ??????? ???????? ??????????? 4227858432 ????? (4,2 GB), 942,633 c, 4,5 MB/c After that I wanted to create new filesystem using fdisk: root@yurko-laptop:/home/yurko-laptop# fdisk /dev/sdb You will not be able to write the partition table. WARNING: DOS-compatible mode is deprecated. It's strongly recommended to switch off the mode (command 'c') and change display units to sectors (command 'u'). Command (m for help): p Disk /dev/sdb: 4227 MB, 4227858432 bytes 4 heads, 63 sectors/track, 32768 cylinders Units = cylinders of 252 * 512 = 129024 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sdb1 18 32768 4126596 b W95 FAT32 Command (m for help): fdisk showed that the partition still exists and I can't write the partition table. I tried to delete the existing partition: Command (m for help): d Selected partition 1 Command (m for help): w Unable to write /dev/sdb root@yurko-laptop:/home/yurko-laptop# Why am I not be able to write the partition table? Does it mean that some hardware failure occurred? And is it possible to repair the current USB drive? I've tried to use hdparm and it showed that the readonly flag is on: root@yurko-laptop:/home/yurko-laptop# hdparm /dev/sdb /dev/sdb: SG_IO: bad/missing sense data, sb[]: f0 00 05 00 00 00 00 0a 00 00 00 00 26 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 multcount = 0 (off) readonly = 1 (on) readahead = 256 (on) geometry = 1016/131/62, sectors = 8257536, start = 0

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  • What is the kernel module "hid_microsoft"?

    - by Masi
    The lsmod-command shows the odd module. The command "modprobe -a hid_microsoft" does not reveal anything. What is it? $ modinfo hid_microsoft filename: /lib/modules/2.6.28-15-generic/kernel/drivers/hid/hid-microsoft.ko license: GPL srcversion: 3FE2E2F2EE89174E885204A alias: hid:b0005v0000045Ep00000701 alias: hid:b0003v0000045Ep0000009D alias: hid:b0003v0000045Ep00000713 alias: hid:b0003v0000045Ep000000F9 alias: hid:b0003v0000045Ep000000DB alias: hid:b0003v0000045Ep0000003B depends: vermagic: 2.6.28-15-generic SMP mod_unload modversions 586

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  • VIM zsh, bash and colors in command line on Ubuntu

    - by Jacek Wysocki
    I have problem with VIM command line when calling system commands. e.g. !ls, all command output colors aren't parsed by VIM. My system is Ubuntu 12.04 LTS with VIM 7.3.429 from Ubuntu repositories. Is there any workaround for this problem? EDIT: My vimrc file :!echo $TERM in VIM returns : dumb EDIT2: I found a simple workaround but it's not perfect if [ "$VIM" ] && [ "$TERM" = "dumb" ] then # For gvim's monochromatic :shell PS1='\n\u@\h \w\n\$ ' unalias ls unalias grep fi (It's working on bash)

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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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  • Why do password entries over ssh take so long?

    - by Dean
    When I'm ssh'd into my server, any time I enter my password, there's a 40 second delay before the server responds. This occurs when logging in, as well as whenever I run a command via sudo. The delay does not happen when I run su and enter my password however. Using the -v flag for ssh doesn't show anything during this time. Looking at Wireshark, all traffic between the two machines stops while this is happening. Any idea what's happening, or advice on how to investigate this? The server is running Debian squeeze (6.0.4)

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  • Screen -X exec commands not working until manually attached

    - by James Watt
    I have a batch script that starts a java server application inside of a screen. The command looks like this: cd /dir/ && screen -A -m -d -S javascreen java -Xms640M -Xmx1024M -jar javaserverapp.jar nogui After I run the batch script, it starts the server and puts it inside the correct screen. If I list my screens after, I see something like this: user@gtwy /dir $ screen -list There is a screen on: 16180.javascreen (Detached) 1 Socket in /var/run/screen/S-user. However, I have a second batch script that sends automated commands to this server and runs on a different crontab interval. Because of the way the application works, I send commands to it like this (this command tells it to alert connected users "testing 123"): screen -X exec .\!\! echo say testing 123 I've also tried: screen -R -X exec .\!\! echo say testing 123 screen -S javascreen -X exec .\!\! echo say testing 123 Unfortunately, these commands DO NOT WORK. They don't even give me an error message, they just do nothing. HOWEVER - If I manually attach to the screen first (with the below command) and then detach, now I can run any of the above commands flawlessly. I can demonstrate this with a video, if I wasn't clear enough here. screen -r -d Thanks in advance. Update: here is the important parts of /etc/screenrc. It should be totally vanilla, I've never edited this file. # VARIABLES # =============================================================== # No annoying audible bell, using "visual bell" # vbell on # default: off # vbell_msg " -- Bell,Bell!! -- " # default: "Wuff,Wuff!!" # Automatically detach on hangup. autodetach on # default: on # Don't display the copyright page startup_message off # default: on # Uses nethack-style messages # nethack on # default: off # Affects the copying of text regions crlf off # default: off # Enable/disable multiuser mode. Standard screen operation is singleuser. # In multiuser mode the commands acladd, aclchg, aclgrp and acldel can be used # to enable (and disable) other user accessing this screen session. # Requires suid-root. multiuser off # Change default scrollback value for new windows defscrollback 1000 # default: 100 # Define the time that all windows monitored for silence should # wait before displaying a message. Default 30 seconds. silencewait 15 # default: 30 # bufferfile: The file to use for commands # "readbuf" ('<') and "writebuf" ('>'): bufferfile $HOME/.screen_exchange # # hardcopydir: The directory which contains all hardcopies. # hardcopydir ~/.hardcopy # hardcopydir ~/.screen # # shell: Default process started in screen's windows. # Makes it possible to use a different shell inside screen # than is set as the default login shell. # If begins with a '-' character, the shell will be started as a login shell. # shell zsh # shell bash # shell ksh shell -$SHELL # shellaka '> |tcsh' # shelltitle '$ |bash' # emulate .logout message pow_detach_msg "Screen session of \$LOGNAME \$:cr:\$:nl:ended." # caption always " %w --- %c:%s" # caption always "%3n %t%? @%u%?%? [%h]%?%=%c" # advertise hardstatus support to $TERMCAP # termcapinfo * '' 'hs:ts=\E_:fs=\E\\:ds=\E_\E\\' # set every new windows hardstatus line to somenthing descriptive # defhstatus "screen: ^En (^Et)" # don't kill window after the process died # zombie "^["

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  • Can't FTP into server

    - by Roland
    I need to FTP in from one server to another If I FTP using my local PC using Krusader I'm able to FTP into the server but if I ssh into one server and I'm trying to FTP to the server using the same ftp credentials I get message [Resolving host address...] I know this address is correct since I can ping it from the server I use the following command lftp 'open -u username,password server' If I use the same command to ftp to a different server it works. Any help advise will be greatly appreciated.

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  • How do you manage perl modules on a Debian system?

    - by nagul
    I'd like to know if you have a method for managing perl modules on your Debian system, with respect to the following: Installing new modules Listing of manually installed modules Checking dependencies, and uninstalling modules I have looked at this perlmonks article for background reading: What is the best way to install CPAN modules on Debian? I have previously installed perl modules using the CPAN module. I have also used dh-make-perl in some cases, when following instructions to build other packages that had perl dependencies. I'd like to institute a coherent policy on my machine so I can better manage how and where the modules are installed, and reduce the chance of breaking perl on my system. I would strongly like a system where I can detect and uninstall modules that are no longer being used.

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  • sg_map & lsscsi showing old storage version

    - by PratapSingh
    I am using SUN storage and recently upgraded/refreshed my ISCSI LUN storage. We have replicated old storage to new storage and attached to our servers. I can see at SUN storage side that storage is attached to server and also from server when I run the below command it prints the following output : iscsiadm -m session tcp: [1] 10.1.1.10:3260,2 iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd The above storage is SUN STORAGE 7420 But when I run sg_map or lsscsi command it prints different version: lsscsi disk SUN Sun Storage 7410 1.0 /dev/sda disk SUN Sun Storage 7410 1.0 /dev/sdb disk SUN Sun Storage 7410 1.0 /dev/sdc disk SUN Sun Storage 7410 1.0 /dev/sdd Output of ls on "/dev/disk/by-path/" ls -1 /dev/disk/by-path/ ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-0 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-0-part1 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-18 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-18-part1 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-2 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-2-part1 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-4 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-4-part1 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-6 ip-10.1.1.10:3260-iscsi-iqn.86-03.com.sun:02:afsfsf58-c56a-6ba8-a944-addd258687cd-lun-6-part1 I have rebooted server twice but still I am getting the same output as given above.

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  • USB resets with Ubuntu 9.10

    - by Grumbel
    Since the upgrade to Ubuntu 9.10 I have issues with getting USB device resets on my Maxtor OneTouch USB harddrive: Nov 9 20:54:37 localhost kernel: [32459.100021] usb 2-2: reset high speed USB device using ehci_hcd and address 4 Nov 9 21:54:37 localhost kernel: [36059.100017] usb 2-2: reset high speed USB device using ehci_hcd and address 4 Nov 9 23:24:37 localhost kernel: [41459.112025] usb 2-2: reset high speed USB device using ehci_hcd and address 4 The device itself continues to work fine, the resets however wake the device out of its sleep state and thus cause it to spin up, which is very annoying. Interestingly, as the log shows, the resets happen at pretty regular intervals (i.e. one hour or half an hour), not randomly. An USB card reader seems to have the same issues, while another USB harddrive from a different manufactor works fine on the same PC. What could be causing this and how could I fix it?

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  • Ganglia and how it communicates

    - by MikeKulls
    I'm a little confused about how Ganglia sends information around and have found conflicting information on the web. I would have thought that the gmond process would either send info to gmetad at a regular interval or gmetad would request info from the various instances of gmond. At least one online article states this is how it works but from what I understand this is incorrect. It appears that you configure all gmond processes to send their info to a central gmond process and gmetad will request info from that central gmond. Is that correct? In my case I have 6 servers sending their information to 1 central server. If I set gmetad to get it's information from the central server then I get information from all 6 servers, all good.. Their weird thing is that if I point gmetad to one of the 6 servers then I still get info from all 6 servers. How is it that server 1 in my cluster if getting stats from all the other servers?

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  • slow pppoe connection using Ubuntu 9.10

    - by Radu
    I have a Compaq Presario CQ61, instaled Ubuntu 9.10 and Windows 7 on it. It works great except the PPPoE connection in Ubuntu, when i dial in Windows my download speed reach up to 91 Mb, rebooted in Ubuntu, downloaded same file from the same server with a speed of maximum 3 Mb, cheked in Windows again 80 - 90 Mb constant. I can't figure what slow's the internet connection in Ubuntu. Anyone has an ideea on this problem ? (NO iptables configured, NO HTB, CBQ ...etc configured) . Thank you

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  • Is there any way to use the xscreensaver gltext to monitor system information?

    - by Shane
    I am trying to get the X screensaver gltext to monitor my system temp and maybe some other stats. Writing a script that puts together the stats periodically is no problem, but the main thing I'm running into is that gltext doesn't refresh - whatever text I feed it stays there. So, for example, I run this command: $ /usr/lib/xscreensaver/gltext -text "`cat /proc/acpi/thermal_zone/THRM/temperature`" and get a gltext window showing: temperature: 60 C I can manipulate it and format it as necessary, but as my CPU heats up and cools down, it doesn't update, even if I include time variables that do. I have a script that feeds gltext the time as the first line and the temp as the second line - and although the time updates continuously as the time changes, the temperature value remains the same as whenever the screensaver started. Is it possible to do what I want, which is change the text every 60 seconds if the temperature changes?

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  • What to do when launchpad is down?

    - by Jon
    As I am writing this (Friday, November 8, 2013 at 9:59:18 PM EST) launchpad is down. Apparently there is a power failure (https://twitter.com/launchpadstatus/status/398980619880775680). I tried running sudo apt-get update on my Ubuntu install. However, I simply get stuck on this: Ign http://ppa.launchpad.net precise InRelease 100% [Waiting for headers] Being a Ubuntu newbie, I tried to point my sources.list file to a different source. I backed up the original sources.list and then deleted the entire file to start afresh. I then added the following lines to it: deb http://mirror.anl.gov/pub/ubuntu/ precise main deb-src http://mirror.anl.gov/pub/ubuntu/ precise main I figured that since I have a different mirror, there would be no problem updating. I was wrong. I get stuck at the same place. I have several questions: Why do I need to hit launchpad? I do not reference it in my sources.list file at all. Is this something where the mirror redirects me to launchpad? Is there a good article out there that I can read on how exactly this whole apt-get update thing works that will help me understand why it is hitting launchpad? Is there any way to get my Ubuntu to update while launchpad is down? Isn't there any redundancy for the launchpad servers?

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  • Why do I get "ignoring out-of-zone data" when restarting BIND

    - by 6bytes
    I've been using my own DNS server but then I moved to a third part DNS provider. Yesterday I wanted to go back to using my own DNS's and cancel this third party service. I've lowered TTL in current DNS conf, changed DNS info in GoDaddy for my domain and that's when problems started. My domain seems to be working only for some people but not for others so clearly something is wrong. When restarting bind service named restart everything seems to be OK but later in email from Logwatch I'm getting errors like this: mydomain.com:30: ignoring out-of-zone data (ns1.mydns.com): 3 Time(s) mydomain.info:16: ignoring out-of-zone data (ns1.mydns.com): 5 Time(s) Can anyone point me in the right direction? My BIND configuration for those two domains below: File: /var/named/chroot/etc/zones.external zone "mydomain.com" IN { type master; file "mydomain.com"; allow-transfer { 213.251.188.140; }; allow-update { none; }; notify yes; also-notify { 213.251.188.140; }; }; zone "mydomain.info" IN { type master; file "mydomain.info"; allow-transfer { 213.251.188.140; }; allow-update { none; }; notify yes; also-notify { 213.251.188.140; }; }; File /var/named/chroot/var/named/mydomain.com being my main domain $TTL 3600 $ORIGIN mydomain.com. @ IN SOA ns1.mydns.com. ns2.mydns.com. ( 2010032101 ; Serial 10800 ; Refresh 3600 ; Retry 2419200 ; Expire 3600 ) ; NXDOMAIN TTL IN NS ns1.mydns.com. IN NS ns2.mydns.com. IN MX 10 ASPMX.L.GOOGLE.COM. IN MX 20 ALT1.ASPMX.L.GOOGLE.COM. IN MX 20 ALT2.ASPMX.L.GOOGLE.COM. IN MX 30 ASPMX2.GOOGLEMAIL.COM. IN MX 30 ASPMX3.GOOGLEMAIL.COM. IN MX 30 ASPMX4.GOOGLEMAIL.COM. IN MX 30 ASPMX5.GOOGLEMAIL.COM. IN A 111.111.111.111 * IN A 111.111.111.111 edu IN A 111.111.111.111 googleXXXXXXXXXXXXXXXX IN CNAME google.com. ns1.mydns.com. IN A 111.111.111.111 File /var/named/chroot/var/named/mydomain.info just an alias in apache for mydomain.com $TTL 86400 $ORIGIN mydomain.info. @ IN SOA ns1.mydns.com. ns2.mydns.com. ( 2009042901 ; Serial 10800 ; Refresh 3600 ; Retry 2419200 ; Expire 3600 ) ; NXDOMAIN TTL IN NS ns1.mydns.com. IN NS ns2.mydns.com. IN A 111.111.111.111 * IN A 111.111.111.111 ns1.mydns.com. IN A 111.111.111.111

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  • How to populate RRD database with CPU and MEM usage data?

    - by Tomaszs
    I have a Lighttpd server (on Centos) and would like to display 4 graphs: lighttpd traffic, lighttpd requests per second, CPU usage and MEM usage. I've set place for rrd database for lighttpd config like this: rrdtool.binary = "/usr/bin/rrdtool" rrdtool.db-name = "/var/www/lighttpd.rrd" And put into my WWW cgi-bin sh file that gets data from lighttpd RRD file and creates graphs of traffic and requests per second like this: #!/bin/sh RRDTOOL=/usr/bin/rrdtool OUTDIR=//var/www/graphs INFILE=/var/www/lighttpd.rrd OUTPRE=lighttpd-traffic WIDTH=400 HEIGHT=100 DISP="-v bytes --title TrafficWebserver \ DEF:binraw=$INFILE:InOctets:AVERAGE \ DEF:binmaxraw=$INFILE:InOctets:MAX \ DEF:binminraw=$INFILE:InOctets:MIN \ DEF:bout=$INFILE:OutOctets:AVERAGE \ DEF:boutmax=$INFILE:OutOctets:MAX \ DEF:boutmin=$INFILE:OutOctets:MIN \ CDEF:bin=binraw,-1,* \ CDEF:binmax=binmaxraw,-1,* \ CDEF:binmin=binminraw,-1,* \ CDEF:binminmax=binmaxraw,binminraw,- \ CDEF:boutminmax=boutmax,boutmin,- \ AREA:binmin#ffffff: \ STACK:binmax#f00000: \ LINE1:binmin#a0a0a0: \ LINE1:binmax#a0a0a0: \ LINE2:bin#efb71d:incoming \ GPRINT:bin:MIN:%.2lf \ GPRINT:bin:AVERAGE:%.2lf \ GPRINT:bin:MAX:%.2lf \ AREA:boutmin#ffffff: \ STACK:boutminmax#00f000: \ LINE1:boutmin#a0a0a0: \ LINE1:boutmax#a0a0a0: \ LINE2:bout#a0a735:outgoing \ GPRINT:bout:MIN:%.2lf \ GPRINT:bout:AVERAGE:%.2lf \ GPRINT:bout:MAX:%.2lf \ " $RRDTOOL graph $OUTDIR/$OUTPRE-hour.png -a PNG --start -14400 $DISP -w $WIDTH -h $HEIGHT $RRDTOOL graph $OUTDIR/$OUTPRE-day.png -a PNG --start -86400 $DISP -w $WIDTH -h $HEIGHT $RRDTOOL graph $OUTDIR/$OUTPRE-month.png -a PNG --start -2592000 $DISP -w $WIDTH -h $HEIGHT OUTPRE=lighttpd-requests DISP="-v req --title RequestsperSecond -u 1 \ DEF:req=$INFILE:Requests:AVERAGE \ DEF:reqmax=$INFILE:Requests:MAX \ DEF:reqmin=$INFILE:Requests:MIN \ CDEF:reqminmax=reqmax,reqmin,- \ AREA:reqmin#ffffff: \ STACK:reqminmax#00f000: \ LINE1:reqmin#a0a0a0: \ LINE1:reqmax#a0a0a0: \ LINE2:req#00a735:requests" $RRDTOOL graph $OUTDIR/$OUTPRE-hour.png -a PNG --start -14400 $DISP -w $WIDTH -h $HEIGHT $RRDTOOL graph $OUTDIR/$OUTPRE-day.png -a PNG --start -86400 $DISP -w $WIDTH -h $HEIGHT $RRDTOOL graph $OUTDIR/$OUTPRE-month.png -a PNG --start -2592000 $DISP -w $WIDTH -h $HEIGHT Basically it's not my script, i get it from somewhere from the internet. Now i would like to do the same for CPU usage and MEM usage. I don't like to use any additional packages! As you can see lighttpd populates lighttpd.rrd file with traffic data and requests per second. Now i would like to the system to populate second rrd file with CPU and MEM usage, so i can add to sh file code to generate graphs for this data. How can I populate RRD file with CPU and MEM usage data? Please, NO THIRD-PARTY tools !

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  • how to limit disk space per user in a PHP web application & CentOS

    - by solid
    we have a web application written in PHP and we want all our users to be able to upload images for e.g. 50MB. We will create a directory structure so that every user has its own folder like app/user1/images app/user2/images ... Now everytime a user uploads an image, we need to check if this is still allowed or not but we don't want 1000 users to continously scan our hard drive counting file sizes in their directory. So writing a script that counts all file sizes in a user directory is not an option I guess? Is there an easier way to calculate used up space per user and limit our app accordingly?

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  • libpam-ldapd not looking for secondary groups

    - by Jorge Suárez de Lis
    I'm migrating from libpam-ldap to libpam-ldapd. I'm having some trouble gathering the secondary groups from LDAP. On libpam-ldap, I had this on the /etc/ldap.conf file: nss_schema rfc2307bis nss_base_passwd ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es nss_base_shadow ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es nss_base_group ou=Groups,ou=CITIUS,dc=inv,dc=usc,dc=es nss_map_attribute uniqueMember member The mapping is there because I'm using groupOfNames instead of groupOfUniqueNames LDAP class for groups, so the attribute naming the members is named member instead of uniqueMember. Now, I want to do the same using libpam-ldapd but I can't get it to work. Here's the relevant part of my /etc/nslcd.conf: base passwd ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es base shadow ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es base group ou=Groups,ou=CITIUS,dc=inv,dc=usc,dc=es map group uniqueMember member And this is the debug output from nslcd, when a user is authenticated: nslcd: [8b4567] DEBUG: connection from pid=12090 uid=0 gid=0 nslcd: [8b4567] DEBUG: nslcd_passwd_byuid(4004) nslcd: [8b4567] DEBUG: myldap_search(base="ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es", filter="(&(objectClass=posixAccount)(uidNumber=4004))") nslcd: [8b4567] DEBUG: ldap_initialize(ldap://172.16.54.31/) nslcd: [8b4567] DEBUG: ldap_set_rebind_proc() nslcd: [8b4567] DEBUG: ldap_set_option(LDAP_OPT_PROTOCOL_VERSION,3) nslcd: [8b4567] DEBUG: ldap_set_option(LDAP_OPT_DEREF,0) nslcd: [8b4567] DEBUG: ldap_set_option(LDAP_OPT_TIMELIMIT,10) nslcd: [8b4567] DEBUG: ldap_set_option(LDAP_OPT_TIMEOUT,10) nslcd: [8b4567] DEBUG: ldap_set_option(LDAP_OPT_NETWORK_TIMEOUT,10) nslcd: [8b4567] DEBUG: ldap_set_option(LDAP_OPT_REFERRALS,LDAP_OPT_ON) nslcd: [8b4567] DEBUG: ldap_set_option(LDAP_OPT_RESTART,LDAP_OPT_ON) nslcd: [8b4567] DEBUG: ldap_simple_bind_s("uid=ubuntu,ou=Applications,ou=CITIUS,dc=inv,dc=usc,dc=es","*****") (uri="ldap://172.16.54.31/") nslcd: [8b4567] connected to LDAP server ldap://172.16.54.31/ nslcd: [8b4567] DEBUG: ldap_result(): end of results nslcd: [7b23c6] DEBUG: connection from pid=15906 uid=0 gid=2000 nslcd: [7b23c6] DEBUG: nslcd_pam_authc("jorge.suarez","","su","***") nslcd: [7b23c6] DEBUG: myldap_search(base="ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es", filter="(&(objectClass=posixAccount)(uid=jorge.suarez))") nslcd: [7b23c6] DEBUG: ldap_initialize(ldap://172.16.54.31/) nslcd: [7b23c6] DEBUG: ldap_set_rebind_proc() nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_PROTOCOL_VERSION,3) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_DEREF,0) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_TIMELIMIT,10) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_TIMEOUT,10) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_NETWORK_TIMEOUT,10) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_REFERRALS,LDAP_OPT_ON) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_RESTART,LDAP_OPT_ON) nslcd: [7b23c6] DEBUG: ldap_simple_bind_s("uid=ubuntu,ou=Applications,ou=CITIUS,dc=inv,dc=usc,dc=es","*****") (uri="ldap://172.16.54.31/") nslcd: [7b23c6] connected to LDAP server ldap://172.16.54.31/ nslcd: [7b23c6] DEBUG: ldap_initialize(ldap://172.16.54.31/) nslcd: [7b23c6] DEBUG: ldap_set_rebind_proc() nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_PROTOCOL_VERSION,3) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_DEREF,0) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_TIMELIMIT,10) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_TIMEOUT,10) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_NETWORK_TIMEOUT,10) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_REFERRALS,LDAP_OPT_ON) nslcd: [7b23c6] DEBUG: ldap_set_option(LDAP_OPT_RESTART,LDAP_OPT_ON) nslcd: [7b23c6] DEBUG: ldap_simple_bind_s("uid=jorge.suarez,ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es","*****") (uri="ldap://172.16.54.31/") nslcd: [7b23c6] connected to LDAP server ldap://172.16.54.31/ nslcd: [7b23c6] DEBUG: myldap_search(base="uid=jorge.suarez,ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es", filter="(objectClass=posixAccount)") nslcd: [7b23c6] DEBUG: ldap_unbind() nslcd: [3c9869] DEBUG: connection from pid=15906 uid=0 gid=2000 nslcd: [3c9869] DEBUG: nslcd_pam_sess_o("jorge.suarez","uid=jorge.suarez,ou=People,ou=CITIUS,dc=inv,dc=usc,dc=es","su","/dev/pts/7","","jorge.suarez") It seems to me that it won't even try to look for groups. What I am doing wrong? I can't see anything relevant to my problem information on the docs. I'm probably not understanding how the map option works.

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