Posts Tagged ‘RHCE’
Nice Cacti Install How To
0 Comments | This entry was posted on Apr 21 2009
RedHat / CentOS Install and Configure Cacti Network Graphing Tool
Reset file permissions of RPM packages
0 Comments | This entry was posted on Apr 16 2009
A disastrous mistake anyone can make on their Linux server is to chown or chmod their entire filesystem.
You can reset the permissions of packages installed with rpm.
To reset file permissions:
root@empulse:$ rpm --setperms {packagename}
To reset ownership permissions:
root@empulse:$ rpm --setugids {packagename}
One-Liners
0 Comments | This entry was posted on Apr 04 2009
Search for multiple processes in one command. Example in using multiple variables.
root@empulse:$ ps auxf | grep -P '(wincompd:|proftpd:)'
Lower the reserved disk space to 0%. By default Linux will reserve 5% of each file system as reserve free disk space.
root@empulse:$ tune2fs -m 0 /dev/hda5 remove reserved space
Compare two files on two remote file systems. I saw this on Command-line-fu.
root@empulse:$ diff <(ssh alice cat /etc/apt/sources.list) <(ssh bob cat /etc/apt/sources.list)
More Tech Notes
0 Comments | This entry was posted on Oct 29 2008
I just created linux.empulsegroup.com to place my Voodoo pad notes. I touch on the various Linux topics that I see on a day to day basis. This includes Apache, MySQL, mail services, and my notes to study for the RHCE exam which I recently received.