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remove empty lines

list files recursively by size

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 directory structure
Copies a directory structure from /home/ to /backups/home (notice that the destination does not have a trailing slash)

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"

Quick access to the ascii table.

Current running process ordered by %CPU
Useful to detect which process is causing system loads. It shows process PID so as we can take further actions.

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"

finding cr-lf files aka dos files with ^M characters
Looking for carriage returns would also identify files with legacy mac line endings. To fix both types: $ perl -i -pe 's/\r\n?/\n/g' $(find . -type f -exec fgrep -l $'\r' "{}" \;)

check site ssl certificate dates
remotely connects to an https site, fetches the ssl certificate and displays the valid dates for the cert


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