How to Use Bash For Loop Commands

1. How do I run a loop in bash?
2. How do you run a loop in a shell script?
3. How do you repeat a command in Linux?
4. How do I run a bash file?
5. How do I write a script in Linux?

How do I run a loop in bash?

The for loop will take each item in the list (in order, one after the other), assign that item as the value of the variable var, execute the commands between do and done then go back to the top, grab the next item in the list and repeat over. The list is defined as a series of strings, separated by spaces.

How do you run a loop in a shell script?

Each time the for loop executes, the value of the variable var is set to the next word in the list of words, word1 to wordN. The until loop is executed as many as times the condition/command evaluates to false. The loop terminates when the condition/command becomes true.

How do you repeat a command in Linux?

How to Run or Repeat a Linux Command Every X Seconds Forever

1. Use watch Command. Watch is a Linux command that allows you to execute a command or program periodically and also shows you output on the screen. ...
2. Use sleep Command. Sleep is often used to debug shell scripts, but it has many other useful purposes as well.

How do I run a bash file?

Make a Bash Script Executable

1. 1) Create a new text file with a . sh extension. ...
2. 2) Add #!/bin/bash to the top of it. This is necessary for the “make it executable” part.
3. 3) Add lines that you'd normally type at the command line. ...
4. 4) At the command line, run chmod u+x YourScriptFileName.sh. ...
5. 5) Run it whenever you need!

How do I write a script in Linux?

How to Write Shell Script in Linux/Unix

1. Create a file using a vi editor(or any other editor). Name script file with extension . sh.
2. Start the script with #! /bin/sh.
3. Write some code.
4. Save the script file as filename.sh.
5. For executing the script type bash filename.sh.