Commands tagged fail2ban (1)

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Big Countdown Clock with hours, minutes and seconds
Figlet is easy to find for download on the internet, and works for any text. Quite cool.

backup your history
simple and easy backup your history with timestamp

Find the package that installed a command

recursive search and replace old with new string, inside files
Using -Z with grep and -0 with xargs handles file names with spaces and special characters.

Capitalize the first letter of every word

find all active IP addresses in a network

Convert unix timestamp to date

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

View user activity per directory.
View all files opened by a user in specified directory. The +D option makes lsof search all sub-directories to complete depth, while ignoring symbolic links.

Get International Space Station sighting information for your city
This command outputs a table of sighting opportunities for the International Space Station. Find the URL for your city here: http://spaceflight.nasa.gov/realdata/sightings/


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