Linux and Unix cheatsheet
TIME_WAIT in netstat
So, ever wonder what all those TIME_WAITs are doing in your netstat listing? Okay, for those of you who don't spend all your waking hou...
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...
How to show my NIC MTU value, and how do I change it to use Jumbo Frame?
How to show my NIC MTU value, and how do I change it to use Jumbo Frame? list current value $ lsattr -E -l en0 -a mtu ...
Chroot SFTP via SSH
Edit sshd_config with options below to match with username. Restart to take effect.
Match User userA
ChrootDirectory /home/userA
ForceCommand internal-sftp
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