Howto use enterprise Linux ‘extras’ to mount a XFS filesystem on a CentOS v5.2 VM Install RPM’s Note: Due to this bug (3205), install binutils to overcome the error “xargs: nm: No such file or directory” while installing kmod-xfs-xen. # yum install binutils # yum install xfsprogs yum-kmod kmod-xfs-xen # mkfs.xfs -f /dev/sda1 Check A chunk of…
To search for text through the entire filesystem from the current path down in Linux use the following : find / -type f -print0 | xargs -0 grep -l "string to search" 2>/dev/null
Listing the mac addresses of nic cards excluding null or loopback MACs i.e. 00:00:00:00:00:00 grep -H . /sys/class/net/*/address | awk ‘{split($0,array,”address:”);print array[2]}’ | grep -v ’00:00:00:00:00:00′
Since live systems are near to impossible to fsck when running (unless you can pull one side of the mirror then clone it to the other (very messy). Become Root sudo su – or su – As root create file in root folder a file named forcefsck touch /forcefsck Restart the system. shutdown -r now
Though there are many ways to redirect using the HTTP 301 status code. (make sure the AllowOverride is set to all on the apache config) The .htaccess must be as follows: Options +FollowSymlinks RewriteEngine on rewritecond %{http_host} ^orig.domain.com [nc] rewriterule ^(.*)$ http://new.domain.com/ $1 [r=301,nc] Replace the orig.domain.com and new.domain.com with the ones needed for your…
/usr/local/nagios/libexec/check_ifstatus -H localhost   Can’t locate Net/SNMP.pm in @INC (@INC contains: /usr/local/nagios/libexec /usr/local/lib/perl5 /usr/local/share/perl5 /usr/lib/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib/perl5 /usr/share/perl5 .) at ./check_ifstatus line 38. BEGIN failed–compilation aborted at ./check_ifstatus line 38. Solution: yum install perl-Net-SNMP
After testing a nagios configuration update ( including a new service or renaming some host etc..) before committing the changes and reloading / restarting the nagios service a good test is the following: /usr/local/nagios/bin/nagios -v /usr/local/nagios/etc/nagios.cfg
On one of my servers running CentOS 6 I had iptraf not displaying the boxes in dialogues correctly. It’s usually fixed by updating the session configuration on putty to translate to utf-8 but in this case that did not work. While the system is a clone from another machine where it works well (puppet confirms) all…
If you need to automate the retrieval of the latest Nagios version path to download this is how I do it. Nothing fancy and it breaks if they change the sourceforge site but we can fix when that happens 🙂 curl -v http://www.nagios.org/download/core/thanks/ 2>&1 | grep tar\.gz | cut -d \” -f 2 |…
DisplayFilters Wireshark uses display filters for general packet filtering while viewing and for its ColoringRules. The basics and the syntax of the display filters are described in the User’s Guide. The master list of display filter protocol fields can be found in the display filter reference. If you need a display filter for a specific protocol, have a look for…
