Commands using cat (502)

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List folders containing only PNGs

Check every URL redirect (HTTP status codes 301/302) with curl
curl -sLkIv --stderr - https://t.co/2rQjHfptZ8 -s: silences the output when piped to a different command -L: follow every redirect -k: ignores certificate errors -I: just request the headers -v: be verbose --stderr - : redirect stderr to stdout https://t.co/2rQjHfptZ8: URL to check for redirects piped to grep -i location: -i: grep target text ignoring case location: : greps every string containing "location:" piped to awk {'print $3'} prints the third column in every string piped to sed '/^$/d' removes blank lines

Provide the ten largest subfolders in the current folder

Install pip with Proxy
Installs pip packages defining a proxy

Command to keep an SSH connection open
This runs the uptime command every 30 seconds to avoid an SSH connection dropping due to inactivity. Granted there are better ways of solving this problem but this is sometimes the right tool for the job.

Place the argument of the most recent command on the shell
This works if your terminal is in Vi mode

list files recursively by size

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

Recursively chmod all dirs to 755 and all files to 644

Create a single-use TCP proxy with debug output to stderr
or you can add "-x" to get a typical hexdump like output


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