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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"

Backup a local drive into a file on the remote host via ssh

Remove all the files except abc in the directory
This is for zsh with extended globbing.

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

copy from host1 to host2, through your host
Good if only you have access to host1 and host2, but they have no access to your host (so ncat won't work) and they have no direct access to each other.

Batch rename extension of all files in a folder, in the example from .txt to .md
Batch rename extension of all files in a folder, in the example from .txt to .md mmv most likely must be installed, but is very powerfull when you want to move/copy/append/link multiple files by wildcard patterns.

Show all the available information about your current distribution, package management and base
Just run this command and it will printout all the info available about your current distribution and package management system.

export iPad App list to txt file
This will generate the same output without changing the current directory, and filepath will be relative to the current directory. Note: it will (still) fail if your iTunes library is in a non-standard location.

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"

One command line web server on port 80 using nc (netcat)
Very simple web server listening on port 80 will serve index.html file or whatever file you like pointing your browser at http://your-IP-address/index.html for example. If your web server is down for maintenance and you'd like to inform your visitors about it, quickly and easily, you just have to put into the index.html file the right HTML code and you are done! Of course you need to be root to run the command using port 80.


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