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...
Chroot SFTP via SSH
Edit sshd_config with options below to match with username. Restart to take effect.
Match User userA
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