Linux and Unix cheatsheet
PMTU (Path MTU) Discovery
Summary Internet computers, mostly servers, sometimes send packets too large for part of a given path. Not handling this correctly can m...
Linux Netfilter tweaks for High traffic servers
If you are serving a high traffic web/DNS server, and recently having PING loss to the server and not all HTTP request were successful to i...
AIX CPU Info
There are number of commands to show what are the current number of processors and their information. 1. show processor multithreading cap...
find files that does not contain a specific string
Let say you want to know if all the metadata.rb file that DOES NOT contains a string called "name" from start of line.
egrep -L ^name */metadata.rb
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