Command Line

To check what directories are in your $PATH, you can use echo $PATH. But since directories are separated by a colon, the output can be difficult to read.
Use tr ":" "\n" to translate ":" to "\n" and the directories will be separated by a new line instead.
Read this article if you don’t know what is $PATH IN Unix/Linux.
 

Have you ever wanted to write one command instead of multiple commands to run a script with different parameters? That is when bash for loop comes in handy.
The code above uses bash for loop to process data 1, 3, and 5. Now you can do something else while waiting for all your data to be processed.

As a data scientist or programmer, the terminal might be your to-go tool for much of your work. Wouldn’t it be nice if you can view your schedule, to-do list, system information, docker, git, and updates of your favorite blogs like below?
That is when WTF comes in handy. In my latest article, I will show you how to create a terminal dashboard exactly like above using WTF.
Link to the article about WTF.

ls is a Linux and Unix command that allows you to list all files and directories in a directory. You can also use ls -d to view only directories and use ls -f to view only files as shown above.

Have you ever wanted to run 2 commands at once? If you want to run 2 commands at the same time, use | . If you want the first command to run successfully before running the second command, use &&.
In the video above, I use sleep 5 to pauses the execution for 5 seconds.
When using |, “Hello” was displayed right away. When using &&, “Hello” was displayed after 5 s.

If you don’t take time to organize your local files frequently, your machine can be messy with files of different types and different purposes. But it is time-consuming to organize files frequently.
Is there a way that you can automate organizing your files using the command line? That is when the organize package comes in handy.
In the code above, I use organize to set rules to delete empty files, move screenshots into “Screenshots” folder, and many more. After setting the rules, I can:

Use organize sim command to simulate how rules can be executed.
Use organize run to execute the rules.

Now, every time you want your machine to be cleaner, just type organize sim and organize run and your files are organized!
Link to organize.
Rules I set to organize my local files.

Have you ever wanted to record your terminal to share the recording with others? If so, use terminalizer.
terminalizer allows you to record your terminal, upload it to its website, and render it as GIF.
You can also customize how recording shows up with terminalizer.
Here is a video that I recorded using terminalizer.
Link to terminalizer.

If you want to save command output to a file, use tee. tee is an Linux/Unix command that allows you to write or append command output to a file.
To save the output of a command using tee, type command | tee filename.txt as shown above.
Use tee -a to append text instead of overwriting text.

If you want to track the time it takes to execute a file in Linux, use time command. The snippet below shows how it works.

real is the time from start to finish of the call. It is the time from the moment you hit the Enter key until the moment the execution is finished.

user – amount of CPU time spent in user mode.

sys – amount of CPU time spent in kernel mode.