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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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  • Increase text size in Ubuntu 10.04 due to having large resolution/monitors

    - by Sridhar Ratnakumar
    I have 24" dual monitors with 1920x1080 resolution on both of them. Consequently the text appears so small. I use the following text-intensive applications frequently: Web browser (Google Chrome) IDE (Komodo) Terminal (Gnome Terminal) Email (Thunderbird) I can configure text size on IDE, Terminal and Email. But for Chrome, it is not a good idea to set proportional font size because often one wants to see the entire (not just proportional fonts) site to be zoomed. So I am asking: Is it possible to increase DPI in Ubuntu (much like on Windows) so as to increase the text size across all apps? OR Is it possible to set permanent 'zoom' in Google Chrome, using a third-party extension maybe? I am using Ubuntu 10.04 (Lucid Lynx)

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  • Updating PHP in CenOS

    - by Reza
    I followed this tutorial to update PHP from 5.3 version to 5.4. My distro is CentOS 5.5. after running following command: yum --enablerepo=remi,remi-test install httpd php php-common I get following error: --> Missing Dependency: php-common = 5.3.13-1.w5 is needed by package php-zts-5.3.13-1.w5.i386 (installed) Error: Missing Dependency: php-common = 5.3.13-1.w5 is needed by package php-zts-5.3.13-1.w5.i386 (installed) Error: php53-common conflicts with php-common You could try using --skip-broken to work around the problem You could try running: package-cleanup --problems package-cleanup --dupes rpm -Va --nofiles --nodigest The program package-cleanup is found in the yum-utils package. How can I solve this error?

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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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  • 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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  • 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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  • Should I install software on a "SAN"

    - by am2605
    Hi, I need to set up ColdFusion 9 on a ubuntu server that has a SAN disk mounted. Is it appropriate to install the CF server software on this disk? I don't really understand the ins and outs of what a SAN is, so I am not sure if the intention is for me to solely install web content on it or whether the server software itself should go here too. Any advice would be extremeness welcome. Many thanks, Andrew.

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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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  • MySQL & tmpfs : performance

    - by Serty Oan
    I was wondering if, and how much, using tmpfs could improve MySQL performance and how it should be done ? My guess would be to do mount -t tmpfs -o size=256M /path/to/mysql/data/DatabaseName, and to use the database normally but maybe I'm wrong (I'm using MyISAM tables only). Will a hourly rsync between the tmpfs /path/to/mysql/data/DatabaseName and /path/to/mysql/data/DatabaseName_backup penalize performances ? If so, how should I make the backup of the tmpfs database ? So, is it a good way to do things, is there a better way or am I losing my time ?

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  • Centos 6.3 install reiserFS support

    - by Alon_A
    I'm trying to change an existing ext4 partition to reiserFS in Centos 6.3 64bit. I've updated the kernel to Centos Plus: First, I've updated /etc/yum.repos.d/CentOS-Base.repo: In the [centosplus] section: enabled=1 includepkgs=kernel* Then I ran yum ypdate and my Kernel was updated to Centos Plus: [root@vappsil disk]# uname -r 2.6.32-279.11.1.el6.centos.plus.x86_64 Then, I've added this to /etc/yum.repos.d/CentOS-Base.repo into the [centosplus] section: includepkgs=kernel* jfsutils reiserfs-utils into the [base] and [updates] section: includepkgs=kernel* jfsutils reiserfs-utils But when trying to execute: yum install reiserfs-utils I get: No package reiserfs-utils available. How can I install the reiserFS-utils package to create a reiserFS partition?

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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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  • Java issues with Apache 2.0 Agent 2.202 for RHEL5 Linux 64bit

    - by Richard
    In trying to install Apache 2.0 Agent 2.202 for RHEL5 Linux 64bit, the dialogue appears as follows. $ ./setup Error : java is not present in path. Please enter JAVAHOME path to pick up java:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/ Launching installer... Attach to native process failed $ ./setup Error : java is not present in path. Please enter JAVAHOME path to pick up java:/usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/lib ./setup: line 80: [: 107:: integer expression expected ./setup: line 83: [: 107:: integer expression expected Error : Incorrect java version (1.2.2 or above is needed). Please enter JAVAHOME path to pick up java: On the server we have the following JREs and I've tried both. $ sudo rpm -qa | egrep "(openjdk|icedtea)" java-1.6.0-openjdk-1.6.0.0-1.27.1.10.8.el5_8 $ find 2>/dev/null | grep -i '/jre/' ./usr/lib/jvm/java-1.4.2-gcj-1.4.2.0/jre/bin/ ... ./usr/lib/jvm/java-1.6.0-openjdk-1.6.0.0.x86_64/jre/ Any suggestions? I know I'm overlooking something. In previous searches I've only found one other posting that comes close but it has no responses (http://forum.parallels.com/showthread.php?t=76556).

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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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  • How can I bind mount a directory with a space in it?

    - by chris
    I have a drive mounted at /media/ that contains a directory with a space in the name - let's call it "My Stuff". I would like to bind mount it to "My Stuff" in my home directory. I tried the following in fstab, but all attempts to mount resulted in a syntax error: /media/My\ Stuff /home/me/My\ Stuff none bind "/media/My\ Stuff" "/home/me/My\ Stuff" none bind "/media/My Stuff" "/home/me/My Stuff" none bind Is there a way to do this?

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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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  • 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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  • 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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  • How to upgrade XMBC Live from 9.04.1 to 9.11?

    - by sunpech
    I've been unable to do a fresh install of XBMC Live 9.11 to my hard drive. Everytime it fails at the Install System step. But I am able to get XBMC Live 9.04.1 to install successfully. How do I upgrade XBMC Live 9.04.1 to 9.11? I understand that Ctrl+Shift+F2 brings up the command line, but what are the next set of commands to run?

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  • Which mail clients can give reminders about unresponded emails?

    - by ulidtko
    In my daily e-mail often happens the following scenario: I send somebody an email which describes some problem and requests an action from the recipient. Typically, I wish to ensure that this action was taken, or at least somehow resolved; when this happens, the email recipient should notify me with a response email about what was done, and what was not and why. But, sometimes emails don't get read by the recipient, or he forgets to reply to me. At the same time, I cannot constantly keep in memory the list of all emails for which I was waiting an answer and still didn't receive it. So I wonder, is there in any email client such a feature which would allow me to somehow mark specific outgoing emails as "demanding reply"? The mail client could in this case notify me if any "demanding reply" emails still aren't replied for a long time.

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  • Recover LVM2 volume group after one HDD failed

    - by Bernd
    I had two HDDs, each one containing a LVM partition which formed a volume group. Then I had two LVs, one for my / directory and one for my /home/ directory. Yesterday where I had my / dir failed. I'm trying to recover at least my /home/ dir. What I've done so far: Boot a live system Extract LVM2 metadata from the working HDD using dd Copy metadata to /etc/lvm/backup/vg0 Now I'm trying to do this: pvcreate --restore /etc/lvm/backup/vg0 --uuid "[uuid of my working hdd]" /dev/sdb2 But I always get: Couldn't find device with uuid '[uuid of broken hdd]'. Couldn't find device with uuid '[uuid of working hdd]'. Device /dev/sdb2 not found (or ignored by filtering). I confirmed that /dev/sdb2 exists and I've commented out all filtering settings from /etc/lvm/lvm.conf so I don't know what might be causing pvcreate not to find the device. So: What might be the problem? Is it even possible to restore this partition? (As I'm writing this I'm starting to think it's impossible D:) Edit: Okay, looks like I've got it figured out. I was using a Ubuntu 8.10 CD (yeah, I know it's not supported anymore) and it seems that was the problem. When I started from a Ubuntu 10.04 CD everything worked 'fine', I could mount my LVM partitions partially without problems. (Will answer the question in 4 hours. But if anyone has still got some hints/tips, please share! :)

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  • Fedora14 serial console how-to needed

    - by lamba2
    Has anyone ever got a serial console working in fedora 14 ? Is it as simple as adding to grub: serial --unit=0 --speed=38400 terminal --timeout=10 serial console and add to the kernel lines: console=tty0 console=ttyS0,38400 ??? If so, this isn't working for me. I have agetty installed, and im using minicom, although i've heard you can also use "screen /dev/ttyUSB0" on the client side. The /etc/init/serial.conf file suggests it should be working, but nothing. Currently getting no joy from any of this after 2 days. Does anyone know a method that definitely works on fedora 14 ? (no /etc/event.d/ needed or such) edit: Client side im using a null modem cable and usb-serial adaptor.

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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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