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  • Is there a proper way to clear logs?

    - by John H.
    I was wondering if there was a proper way to clear logs in general? I'm new to Ubuntu and I'm trying to set up Postfix. The log in question is /var/log/mail.log. I was wondering if there was a correct way to clear it, rather than me going in it and deleting all the lines and saving it. I find that sometimes errors don't get written to it immediately after I clear the log and save it. Side note: I'm having trouble setting up Postfix and am trying to make it easier for me to read the logs hoping it can help me out, instead of having to scroll all the way down.

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  • Two IP ranges on eth1 configuration for centos 6.2

    - by Trickzzz
    i have a dedicated server, with "Virtuozzo" on it running VPS's. I have: eth0 - which is configured to the internal network, that one is fine. Now I have: eth1 - which has two ranges routed through this device. x.x.134.x (which has 12 IP's sequentially) x.x.132.x (which has 5) eth1: DEVICE="eth1" HWADDR="00:25:90:37:65:67" NM_CONTROLLED="yes" ONBOOT="yes" IPADDR="x.x.134.x" NETMASK="255.255.255.240" GATEWAY="x.x.134.x" I tried using this with another file as well named "ifcfg-eth1:1" in /etc/sysconfig/network-scripts/ any ideas why the containers on eth1:1 would not link up to the network? Virtuozzo also thinks that eth1:1 is the primary network now, which isn't right?

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  • how can I estimate the conversion speed (fps) of a video based on CPU power? [closed]

    - by Ahoura Ghotbi
    Atm I am running a video sharing website and I am converting alot of videos. the queue is getting a bit too long (400 videos). I am planning on purchasing a new server and I was wondering if there anyway I can estimate the fps while converting 10 videos at the same time? Regards EXTRA INFO I am using MP4Box (which uses ffmpeg) to handle the encoding etc. Its encoding at 23 CRF, audio bitrate of 96 and audio sampling rate of 44100. The server will have the following processor : Dual Opteron 6272 (2 x 16 cores, 32 cores total) + 128GB RAM.

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  • Automate Restart Of Solr

    - by Brain Buddies
    I have 3 instance of solr running using tomcat (in shell u will find something like -Dcatalina.base=/usr/local/apache-tomcat-6.0.35 -) suing tomcat_1 (in shell u will find something like -Dcatalina.base=/usr/local/apache-tomcat-6.0.35_1 -) using tomcat_2 (in shell u will find something like -Dcatalina.base=/usr/local/apache-tomcat-6.0.35_2 -) Can i write a shell script which can kill the particular instance for 1 : kill tomcat but not tomcat_1 & tomcat_2 for 2 : kill tomcat_1 but not tomcat & tomcat_2 for 3 : kill tomcat_2 but not tomcat & tomcat_1

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  • Debian SMB share having permission issues in windows 7

    - by xxpor
    Hi Everyone, I setup a Debian squeeze server with samba. I then shared my /media directory with the following configuration: [media] comment=Hard Drives read only = no locking = no path = /media guest ok = yes browsable = yes directory mask = 0777 When the drives are mapped in Windows 7, the user can write to all of the subdirectories of media (sdb1, sdc1, etc), but cannot write to any folders that they create themselves in the subdirectories of media. For example, if the user mapped /media/sdb1 to Z:, and then creates a folder Z:\test, the folder is created successfully, but no files can be written to Z:\test. If the user ssh's into the server, they have no problems writing to these directories. I have included the screenshots, in order, of what happens on Windows. This samba share is mounted with ntfs-3g, if it makes a difference. Screenshots are here

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  • sa2 -A /var/log/sa/sa13: No such file or directory

    - by user53925
    I have systat version 7.0.2 and the /etc/sysconfig/sysstat has the entry HISTORY=27, this is on a redhat enterprise server 5.6, the cron setup for this is # run system activity accounting tool every minute * * * * * root /usr/lib64/sa/sa1 1 1 # generate a daily summary of process accounting at 23:53 53 23 * * * root /usr/lib64/sa/sa2 -A I get the following error from the cron sa2 -A find: /var/log/sa/sa13: No such file or directory, Looking at the directory /var/log/sa the files are created from sa01 through sa10 (sa1 created on sep1, sa2 created on sep2 and so on), then the rest of the files are from sa14 through to sa 31 (created from Aug 14 to Aug 31). I have not made any changes on the server so I am not sure why I am getting these error messages and is there a way to fix this?. Someone suggested creating empty files from sa11 through sa14 to fix this but I am not sure if this might mess up something .

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  • Allowing ssh in iptables

    - by sat
    I am doing iptables firewall configuration. Actually, I need to allow ssh connection only from particular IP. But, It is blocking the ssh connection. I used the below commands. sat:~# iptables -F sat:~# iptables -A INPUT -p tcp -s src_ip_address -d my_ip_address --dport 22 -m state --state NEW,ESTABLISHED -j ACCEPT sat:~# iptables -A INPUT -j DROP sat:~# iptables -nL Chain INPUT (policy ACCEPT) target prot opt source destination ACCEPT tcp -- src_ip_address my_ip_address tcp dpt:22 state NEW,ESTABLISHED DROP all -- 0.0.0.0/0 0.0.0.0/0 Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination If I try to connect from src_ip_address to my_ip_address, it is blocking the connection. Even, It is blocking from my_ip_address to src_ip_address . I haven't put any rules for OUTPUT chain. What is wrong with my commands? How to allow ssh in iptables?

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  • is there a way to tail a log from remote server without using any user credentials?

    - by suhprano
    I run a script tailing a log in a remote server, like so: ssh userx@someip tail -f /data/current.log|python2.7 monitorlog.py There are dependencies and service requirements that disallows me to run the script off the remote server. (DB, ACLs, and path to another service is uses) Is there a way I can tail and monitor a log without using the ssh userx@someip? I thought about generating RSA keys but I think you still need a user to ssh.

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  • MySql backup (MySqldump questions)

    - by Camran
    I have a vps with ubuntu 9 server. I need to backup my MySql database. Can MySql make backups automatically? If so, how? If not, how should I do it then? The website is a classifieds website (PHP, MySql etc) Thanks

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  • Syslog message '^@' indicates server crash

    - by user1456214
    The php-cgi's died on a vps I look after and the only syslog entry is this followed by me restarting the VM: ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@Jun 13 22:00:34 VM syslogd 1.5.0#5ubuntu4: restart. Everything before appears to be fine, and there's nothing in the php log even though php timing out was the most obvious symptom (nginx was returning 504s), any ideas how to debug this? Thanks, Jon

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  • Changing the name of a binary packaged application and its evoking command

    - by jerkstore
    I have taken the source code of a large project, App A, and made many modifications to it to produce my version, App B. Both App A and App B compile cleanly on Debian and Red Hat and now I would like to build binary packages for both platforms. The last modification I need to make is ensuring App B can be installed alongside App A without any interference. I should be able to evoke both application-a and application-b in the terminal and have both be listed as separate software in whatever desktop environment is present. The projects have a debian/ folder (containing rules, control, etc.) and an rpm/ folder containing a SPEC file. Currently, building and installing the .rpm and .deb packages works except that App B is recognized as App A and therefore does not meet the aforementioned requirements. ldd shows the programs have the same exact dependencies and I am not able to pursue static linking of libraries. What modifications do I need to make to my project to achieve the desired outcome? Please be specific as I do not have much experience with the packaging process.

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  • How to append to a file as sudo? [closed]

    - by obvio171
    Possible Duplicate: sudo unable to write to /etc/profile I want to do: echo "something" >> /etc/config_file But, since only the root user has write permission to this file, I can't do that. But this: sudo echo "something" >> /etc/config_file also doesn't work. Is there any way to append to a file in that situation without having to first open it with a sudo'd editor and then appending the new content by hand?

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  • Access denied for user 'root@localhost' (using password:NO)

    - by murgatroid99
    I am attempting to install a network management package called cacti onto Ubuntu running under Windows Virtual PC. I attempted to install MySQL as it is one of cacti's dependencies. I can install and start the MySQL server, but whenever I try to access it in any other way, such as to change the password, I get the error message Access denied for user 'root@localhost' (using password:NO). I would like to know what is causing this and how to fix it. Edit: (just in case my comments are not visible) The answers from HD and Devin Ceartas did not work for me.

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  • Installing Debian 7.6.0 on Lenovo Y50

    - by Girauder
    I was trying to install Debian on my new laptop: a Lenovo Y50 64bit running Windows 8. I got together with a friend and installed Debian in his computer first and had no problems. However I've tried to install Debian several times using the AMD64 KDE and netinst versions and accomplished nothing. First try: installed the KDE version. Grub would let me choose which operating system I wanted, but when I selected Debian it would only load the command line. Second try: Reinstalled but this time with the netinst version. I only got a black screen where I could type but nothing else. Third Try. Tried the netinst again. This time after making the partitions I got a message that said that no EFI partition was found. I ignored the message and this time it wouldn't even load Grub. only a command like interface with grub rescue or something. Not once did I get an error during the installation. What am I doing wrong? I assume the problem is I need to make an EFI partition or something like that. So why is it that during the first installations I didn't ask me for that. And if that is indeed the problem, How can I solve it? Update So the installation failed again... as predicted. Here you can find the Disk Management picture. http://postimg.org/image/433cpfkjz/ Please somebody help me. I keep getting the grub rescue thing. secure boot is disabled and legacy support is set first.

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  • Why is 64 bit Ubuntu not recomended for daily usage?

    - by REA_ANDREW
    I am just in the process of setting up a new laptop which came with Windows 7 64 bit installed. I am going to set it up to dual boot Windows 7 and Ubuntu. When I went to get the Ubuntu download I noticed that the 64 bit version is labelled with Not recomended for daily desktop usageNot recomended for daily desktop usage Why would this be? Why is 64 bit Ubuntu not recommended for daily desktop usage?

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  • Mac Terminal - Color Co-ordinated

    - by Biscuit128
    I would like to create a couple of short cuts on my iMac which ssh on to my dev box and on to my prod box. I would like my dev connection to use the settings something similar to home-brew (green text black background) and my prod connection to use red text black background) - How can this be configured so that this is possible. Would I need multiple bashrc files one for prod and one for dev and source individually? If this is the case, how can i get the profiles to be sources as soon as i double click the shortcuts? Thanks

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  • ip6tables blocking output traffic

    - by jmccrohan
    My OpenVZ VPS is blocking outbound IPv6 traffic, but correctly filtering inbound IPv6 traffic. Below is my ip6tables-restore script. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] -A INPUT -i lo -j ACCEPT -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p ipv6-icmp -j ACCEPT -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT -A INPUT -p udp -m udp --dport 1194 -j ACCEPT -A INPUT -p tcp -m tcp --dport 51413 -j ACCEPT -A INPUT -p udp -m udp --dport 51413 -j ACCEPT -A INPUT -m limit --limit 5/min -A INPUT -j REJECT --reject-with icmp6-adm-prohibited -A FORWARD -j ACCEPT -A OUTPUT -j ACCEPT COMMIT ICMPv6 traffic is still able to pass both inbound and outbound. When I flush these rules using -F, outbound traffic flows fine. What am I missing here? EDIT: It appears that ip6tables is marking ESTABLISHED packets as INVALID. Consequently, the outbound traffic is NOT actually being blocked. The reply packets are not allowed inbound again, hence appearing like blocked outbound traffic. Allowing INVALID packets inbound solves the outbound issue, but also renders the inbound filter useless.

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  • Why does changing a truecrypt password take such a long time?

    - by Alex
    I am changing the password of a truecrypt file container. This takes around 1 minute. Why? time truecrypt --text --change /tmp/user1.tc --keyfiles= --new-keyfiles= --password=known --new-password=known --random-source=/dev/null" If I use strace I see that it basically does not do anything: it simply reads lots of random data from /dev/urandom (even if i specified /dev/null as random source) and finally changes the password: open("/dev/urandom", O_RDONLY) = 6 read(6, "\36&{\351\212\212\343\202\34\313\242\312I\326\235\245\224\300\354O)\270Q\200 \201J\227\224\311_\212\367"..., 640) = 640 close(6) = 0

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  • use ubuntu from a removable drive to work both on laptop and desktop computer

    - by moragos
    my laptop, which i run ubuntu on, is getting a bit old and i find it's getting slower and slower at running applications. My desktop computer is stronger, but I can't give up on the portability of my laptop. I was thinking of installing a HD drawer for both my laptop and desktop. and when I come home just pull the HD from the laptop and plug it into the desktop. I wanted to ask if anyone have tried it or have any inputs on the idea

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