Commands tagged block (4)

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Merge Multiple PDFs
Merge Multiple PDFs In Alphabetical Order

Join lines
It's works only when you replace '\n' to ONE character.

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"

Convert CSV to JSON
Replace 'csv_file.csv' with your filename.

Rename files in batch

display an embeded help message from bash script header
With this one liner you can easily output a standard help message using the following convention: Usage: is the start marker Stop at the last #

Pack up some files into a tarball on a remote server without writing to the local filesystem
I recently found myself with a filesystem I couldn't write to and a bunch of files I had to get the hell out of dodge, preferably not one at a time. This command makes it possible to pack a bunch of files into a single archive and write it to a remote server.

check open ports without netstat or lsof

Monitor a file's size
use "watch" instead of while-loops in these simple cases

remove *.jpg smaller than 500x500


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