Commands by HansReiser (1)

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Grep only files matching certain pattern (Advanced)

Encode a string using ROT47
This command will encode a string using the ROT47 cipher.

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

Watch the progress of 'dd'
run this in another terminal, were xxxx is the process ID of the running dd process. the progress will report on the original terminal that you ran dd on

FInd the 10 biggest files taking up disk space

Convert seconds to [DD:][HH:]MM:SS
Converts any number of seconds into days, hours, minutes and seconds. sec2dhms() { declare -i SS="$1" D=$(( SS / 86400 )) H=$(( SS % 86400 / 3600 )) M=$(( SS % 3600 / 60 )) S=$(( SS % 60 )) [ "$D" -gt 0 ] && echo -n "${D}:" [ "$H" -gt 0 ] && printf "%02g:" "$H" printf "%02g:%02g\n" "$M" "$S" }

Follow the flow of a log file
tailf same as tail -f follow the flow of a log file, showing it in real time to stdout.

write by vim need root privilege

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"

Determine an image's dimensions
Simple use of ImageMagick identify function.


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