
Linux


GNU Regex POSIX character classes

How to remove/delete CTRL-M (^M) characters from text files in Linux and UNIX systems

AWK as Grep

Colorize linux programs output
Learn how to make your Bash/Shell script colourful and attractive without installing any plugins and configuration.

7-bit ASCII Character Codes

nftables geoip - continents ip

nftables and GeoIP

How nftables log to external file
BIND DNS server - permission denied
