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Stat each file in a directory
Possible simplification of egrep-awk-sort with find and -exec with xargs.

list files recursively by size

Get count of kilobytes brew cleanup would free

download the contents of a remote folder in the current local folder

Query well known ports list
Uses the file located in /etc/services

Get your external IP address
Request all information about my IP address in json format

Create a local compressed tarball from remote host directory
The command uses ssh(1) to get to a remote host, uses tar(1) to archive a remote directory, prints the result to STDOUT, which is piped to gzip(1) to compress to a local file. In other words, we are archiving and compressing a remote directory to our local box.

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"

dd with progress bar and statistics
Will automatically take the size of the file but longer, usefull only if in an function.

Run a ext4 file system check and badblocks scan with progress info
Nothing fancy, just a regular filesystem scan that calls the badblocks program and shows some progress info. The used options are: -c ? check for bad sectors with badblocks program -D ? optimize directories if possible -f ? force check, even if filesystem seems clean -t ? print timing stats (use -tt for more) -y ? assume answer ?yes? to all questions -C 0 ? print progress info to stdout /dev/sdxx ? the partition to check, (e.g. /dev/sda1 for first partition on first hard disk) NOTE: Never run fsck on a mounted partition!


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