Some very useful examples of code that will help you in your endevors….

Remove Semaphore Arrays that no longer have home.

ipcs -s|grep nobody|awk '{print $2}'|xargs ipcrm sem

This will show all IPs currently connected to port 80. You can change the :80 to any port you want to monitor. So, this isn’t just applicable to apache.

netstat -tn 2>/dev/null | grep :80 | awk '{print $5}' | cut -f1 -d: | \sort | uniq -c | sort -rn | head

Oh Noz! My / partition is full! Gosh darn those pesky old kernels.

So mytop presents you with: Error in option spec:”long|!” here is an easy fix.

replace ‘long|!’ ‘long!’ — /usr/bin/mytop

Handy way to quickly tune the file system to “hopefully” avoid a disk check on reboot.

for i in $(fdisk -l|grep Linux|grep dev|awk {‘print $1′}); do tune2fs -C 0 -T now $i;done