Linux Bash Script Variable as command-CodePudding

I have to create a script on RHEL and was wondering if I am able to save the output of a command as a variable. For example:

4.2.2 Ensure logging is configured (Not Scored) : = OUTPUT (which comes from the command sudo cat /etc/rsyslog.conf)

This is what I have now.

echo " ### 4.2.2 Ensure logging is configured (Not Scored) : ### "
echo " "
echo "Running command: "
echo "#sudo cat /etc/rsyslog.conf"
echo " "

sudo cat /etc/rsyslog.conf

Thank you!

CodePudding user response：

variable=$(command)
variable=$(command [option…] argument1 arguments2 …)
variable=$(/path/to/command)

Taken from https://linuxhint.com/bash_command_output_variable/

CodePudding user response：

Here is an example:

MESSAGE=$(echo "Hello!")
echo $MESSAGE
Hello!

Or the old standard:

MESSAGE=`echo "Hello!"`
echo $MESSAGE
Hello!

In your case:

FILE_CONTENT=$(cat /etc/rsyslog.conf)

NOTE!!!: It is very important to not use spaces near equal!

This form is incorrect:

MESSAGE = `echo "Hello!"`
MESSAGE: command not found