Basic usage:

htop

htop --help

As you can see, htop adds color to its output, making it a bit easier to pick out the elements that interest you quickly. It also shows a bit more detail about your hardware by default. CPU, memory, and swap conditions are displayed by default. You can get a great idea of what’s happening on your system with just a quick glance. Use the function keys to change settings, kill processes, and more.

column – Print Data in Neat, Aligned Columns

Have you ever found yourself looking at a file of comma, space, or semicolon-separated values, wishing there was a quick and easy way to organize it on the screen and make it easier to read? This is where column comes in. When you just need to get some quick information out of a file and don’t want to actually process the data, column transforms your file into organized, easy-to-read tables right in the terminal.

This command should be available on virtually all Linux distributions with no need to install anything.

Here is an example of viewing a CSV file in the terminal with no extra formatting:

And here is how it looks when run through column:

Basic usage:

# Format data.txt into a table
cat data.txt | column -t

#Format data into a table and run through more
cat data.txt | column -t | more

#Specify comma separator and make a table
column -s, -t < file.csv

#Specify semicolon separator and make a table
column -s; -t < file.csv

#Truncate data in column 1 if needed
column -s, -t --table-truncate 1 < file.csv

#See help for full explanation of switches
Column --help

You can get more out of column by piping its output into other tools or files. You can save the output as a new file or pipe it into more for the ability to move backward and forward through the data.

watch – Monitor Any Command in Real Time

The watch command will let you run any other command at specific time intervals (default of two seconds) and keep an eye on the output. It’s perfect when you need to monitor some part of your system for changes.

The watch command should be available on all Linux distributions by default.

Basic usage:

#Watch disk usage

watch df -h

#Monitor directory for file changes

watch ls -l

#Watch memory and highlight changes

watch -d free -m

#Full help

watch --help

man watch

Whether you’re looking for a runaway process or trying to verify that desired changes are happening, the watch utility can give you insights into things you might now be able to see otherwise.

pv – A Progress Bar For Long-Running Commands

There are many Linux commands, such as cp and mv, that don’t give any kind of useful output about their progress. If you’re trying to manipulate large files or need to run other commands that can take some time to complete, you’ve undoubtedly found yourself in the “Is it actually doing anything?” situation. This is where pv comes in.

Install with:

sudo apt install pv

sudo dnf install pv

Basic usage:

#Monitor file copy progress

pv source_file > destination_file

#Monitor file compression progress

pv file_to_compress | gzip > compressed_file.gz

#Full help and usage

pv --help

man pv

The pv command provides a progress bar complete with percentage and time estimates of job completion. You no longer have to scratch your head wondering if you should let the process go or kill it and try something else.

tldr – Simplified Manual Pages For Common Commands

The man pages built into Linux are a great resource when you need a detailed description of how something works and can be used. Sometimes, however, the information gets so detailed and complex that you end up more confused than when you started reading. That’s where tldr comes in.

Install with:

sudo apt install tldr

sudo dnf install tldr

Basic usage:

tldr tar

tldr cp

tldr <any command here>

The tldr command works similar to man but it will give you simplified and more straightforward explanations. For most commands it also provides easy-to-understand command line examples to help you get through the most common tasks quickly.

eza – A Modernized ls Replacement

The directory listing command ls is probably the single most used command on any Linux system—and the oldest. eza gives the same basic functionality but adds many extras that enhance the experience of today’s hyper productive power users.

Install with:

sudo apt install eza

sudo dnf install eza

Basic usage:

#List all including hidden

eza --all

#List tree structure

eza --long --tree --level=3

#List headers, icons, and Git statuses

eza --long --header --icons --git

#Help

eza --help

For developers, analysts, and other power users, eza can quickly become an indispensable tool. It provides more meaningful information than its older counterpart and the color-coded output makes it easy to focus on exactly what you are looking for.

tree – View the Tree Structure of File Systems

The tree command will let you view the contents of any directory in a tree-like structure, allowing you to visualize the hierarchy of folders and files. It can be an effective tool to help keep things organized and in the right place.

Install with:

sudo apt install tree

sudo dnf install tree

Basic usage:

#Tree of current directory

tree

#Tree of specific directory

tree /etc/

#Help and usage:

tree --help

man tree

The tree command is a great tool to help you get a visual idea of the layout of any part of your file system. You can look at anything from the entire root directory down to collections of small personal files. It makes it easy to spot duplicated items, small directories that could be consolidated, and more.

One of the most appealing things about Linux is the abundance of alternatives and choices it makes available to everyone. It’s normal to grow accustomed to the way you do things over time, but it never hurts to check out the alternatives once in a while. You just might find a hidden gem that will make a positive difference in your daily workflow.