Commands using echo (1,545)

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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.

Selecting a random file/folder of a folder
Also looks in subfolders

Search for a string inside all files in the current directory

Display the output of a command from the first line until the first instance of a regular expression.
Slightly simpler version of previous sed command that does the same thing. In this case, the output will stop at the command, and the entire command will be terminated as well, instead of proceeding through the whole file.

Advanced python tracing
Trace python statement execution and syscalls invoked during that simultaneously

read a file line by line and perform some operation on each line
see sample output

Rename files in batch

Rotate a video file by 90 degrees CW
Change video orientation in metadata only


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