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

Show network throughput
Real gurus don't need fancy tools like iftop or jnettop.

List the URLs of tabs of the frontmost Chrome window in OS X
This also works with Safari if you just change the application name. Replace $ window 1 with $ windows to list the URLs of tabs in all windows instead of only the frontmost window. This also includes titles: $ osascript -e{'set o to""','tell app"google chrome"','repeat with t in tabs of window 1','set o to o&url of t&"\n"&" "&title of t&"\n"',end,end}|sed \$d .

Displays process tree of all running processes
G - uses VT100 line drawing a - shows command line arguments of process p - prints PID of process For other options, man pstree :)

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"

Replace space in filename
This commands removes space from all the files with specific extension. I've specifed *.jpg as an example.

Get IP from hostname
Get the IP of a hostname.

Nmap list IPs in a network and saves in a txt

Start another instance of X via SSH

Execute a command on multiple hosts in parallel
Ssh to host1, host2, and host3, executing on each host and saving the output in {host}.log. I don't have the 'parallel' command installed, otherwise it sounds interesting and less cryptic.


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