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Usefool Shell Tools

On this page you can found a lot of usefool shell tools to earn time.


Pandoc is an documents converter, he can convert a lot of scripts files in other. (like markdown to dokuwiki or latex)

Complete list of possible conversion is available here.


Fedora => sudo dnf install pandoc
Debian => sudo apt install pandoc
Arch   => sudo pacman -S pandoc

Conversion examples

To convert (markdown) to dokuwiki markdown syntax.

pandoc -r commonmark -t dokuwiki

When you type this command normally your terminal must display the new syntax of the document recently converted.

To do the same thing but this time with an different output file.

pandoc -r commonmark -t dokuwiki -o my_outputfile

With this command your terminal don't display anything but the new file is created on the desired path.

Exa : the ls replacement

exa is an improved file lister with more features and better defaults. It uses colours to distinguish file types and metadata. It knows about symlinks, extended attributes, and Git. And it’s small, fast, and just one single binary.

Install exa

On debian based

curl -sSf | sh
wget -c
mv exa-linux-x86_64 /usr/local/bin/exa && chown root:root /usr/local/bin/exa

On RPM based & arch.

dnf install exa #on fedora
pacman -S exa #on ArchLinux

Exa usage

Few good argument to use with exa.

exa -lh #ls -l equivalent with more information in header of the output
exa -lhuUa # more informations like user acces/​creation

To have more example of uses you can visit the official website of exa.

Bat : the cat replacement

A cat(1) clone with syntax highlighting and Git integration.

Install bat

For Debian based you must download the archive on the official repository here.

# Debian
dpkg -i bat_0.8.0_amd64.deb #adapt the command at the version and your architecture

# ArchLinux
pacman -S bat

# FreeBSD
pkg install bat
# or built your own from BSD port
cd /usr/ports/textproc/bat
make install

# MacOS
brew install bat

# Windows
scoop install bat

Bat usage

# Display a single file
bat /home/$USER/.bashrc

# Read from stdin, determine the syntax automatically
curl -s | bat

# As replacement for cat
bat >  # quickly create a new file

bat >

bat -n  # show line numbers (only)


Mcrypt is a powerful and easy to use tool to encrypt your files and folder.

Install mcrypt

apt install mcrypt

Mcrypt usage

mcrypt yourfile.txt # keep the password you have entered during the encryption he is necessary to unlock your files.

When it's done you get a new file with the extension .nc. It's your encrypted file.

Uncrypt files

mcrypt -d #type your password


Nmon is an alternative at HTOP to monitor your system. It offers more functions than HTOP and he have a better look.

Install nmon

apt install nmon && nmon

When you launch nmon as simple user you can see options with hit "h" on the keyboard.


Tool to colorize your logs, he support a lot of extension. Use "man ccze" to have complete list.

CCZE usage

ccze < /var/log/syslog

CCZE & tail

tail -200 /var/log/syslog | ccze -A

With combinaison of commands.

journalctl | tail -200 | ccze -A

Use CCZE to get .html page from logs

tail -100 /var/log/syslog | ccze -h > ~/syslog.html