Commands by dattaway (1)

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Go to the Nth line of file [text editor]
This is not printing, real editing using the text editor.

Print a list of standard error codes and descriptions.
Written by jmcnamara Taken from http://www.perlmonks.org/?node_id=274896

Lists all listening ports together with the PID of the associated process
Lists all opened sockets (not only listeners), no DNS resolution (so it's fast), the process id and the user holding the socket. Previous samples were limiting to TCP too, this also lists UDP listeners.

Rename files in batch

Show highlighted text with full terminal width
Show a full terminal line inverted with custom text.

Which processes are listening on a specific port (e.g. port 80)
swap out "80" for your port of interest. Can use port number or named ports e.g. "http"

Prefix every line with a timestamp

repeat any string or char n times without spaces between
(here is character '+' repeated 80 times) Sometimes needed to enhance the title of the script.

The BOFH Excuse Server

Convert tab separate file (TSV) to JSON with jq
With this command you can convert a tab separate file (TSV) into a JSON file with jq. For example, this input.tsv i-0b9adca882e5e6326 172.16.0.188 i-088dd69e5c3624888 172.16.0.102 i-0e70eac180537d4aa 172.16.0.85 will produce the showed output.


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