Commands tagged built-in (4)

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Block all IP addresses and domains that have attempted brute force SSH login to computer
I use iptables. To rate limit connections. Very easy and no ban lists to manage.

Reverse ssh
Both hosts must be running ssh and also the outside host must have a port forwarded to port 22.

find text in a file
this will find text in the directory you specify and give you line where it appears.

Disable beep sound from your computer
This command will disable the beep sound from the PC speaker.

Lists all directories under the current dir excluding the .svn directory and its contents

Down for everyone or just me?
Check if a site is down with downforeveryoneorjustme.com

Simple Comment an entire file
With this simple sed command we can easily comment and entire file.

pulsed terminal clock
hypnotizing pendulum

Recursively remove directory with many files quickly
rsync'ing an empty directory over a directory to be deleted recursively is much faster than using rm -rf, for various reasons. Relevant only for directories with really a lot of files.

Refresh the cache of font directory
Refresh the cache of font directory , usefull after you download font (.ttf or other) from various website and you don't want to reboot or relogin . Close your word processor before using the command , after the refresh reopen your word processor , new fonts is avaible !


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