admin – Technology Leadership Corporation

Nov 24

Fix yum hang on CentOS

ls -l /var/lib/rpm rm -f /var/lib/rpm/__db* rpm -vv –rebuilddb rm /var/run/yum.pid yum yum clean all OPTIONAL: yum update

Sep 16

LINUX PowerShell alias alias alias cmd=’new alias’ Set-Alias ‘new alias’ cmd cat a >> b cat a |sc b clear …

Jul 26

Print the number of bytes of storage capacity the current directory recursively uses:

ls -lR $1 | grep -v ^d | awk ‘{total+=$5;} END {print total;}’

Oct 21

Turn off color in vi

:syntax off

Line count output (rate) per 1 second (e.g. to determine # of apache web requests at 1 second intervals)

tail -f access.log|perl -e ‘while (<>) {$l++;if (time > $e) {$e=time;print “$l\n”;$l=0}}’