HowTo Run a Script In Linux

How do I run a Linux shell script? How can I run a script in Linux?

By default script will not run. You need to set execute permission for your script. To execute or run script type the following command:
chmod +x script-name-here
OR
chmod 0755 script.sh
Use the ls command to view permission on the script:
$ ls -l script-name-here
To execute the script, type:
$ ./script-name-here
You can also run a script using any one of the following syntax:
$ /path/to/shell/script/backup.sh
Run a script called backup.ksh using ksh shell:
$ ksh backup.ksh
Run a script called backup.bash using BASH shell:
$ bash backup.bash

Example

Create a shell script called hello.sh using a text editor:

 
#!/bin/bash
echo "Hello $USER."
echo "Today is $(date)"
echo "Current working directory : $(pwd)"
 

Save and close the file. Set the permission:
$ chmod +x hello.sh
$ ./hello.sh
If the current directory is in the PATH variable, you can avoid typing the ./ before the hello.sh. It is a good idea to create your own bin directory as follows:
$ mkdir $HOME/bin
Add $HOME/bin to the PATH variable using bash shell export command:
$ export PATH=$PATH:$HOME/bin
$ echo $PATH
Move hello.sh in $HOME/bin using the mv command:
$ mv hello.sh $HOME/bin
Execute the script:
$ hello.sh
Sample outputs:

Hello vivek.
Today is Thu Nov 10 17:49:15 IST 2011
Current working directory : /nafiler05/users/v/vivek/bin/demos

See also:

• Hello, World! Tutorial from the Linux shell scripting wiki.

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