Linux and Unix cheatsheet
AIX compression with TAR, COMPRESS, GZIP, ZCAT
tar tar in AIX by default does not support compression. You will need to incorporate with gzip command to have it tar and compress at the...
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...
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...
running a cron at every month end
If tomorrow's date is 01, condition will be true and it will execute subsequent command.
55 23 * * * [ `date -d tomorrow +\%d` -eq '01' ] && /path/to/script
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