Question: How do you print the value of a variable in Linux?

How do I print a variable value in Linux?

Sh, Ksh, or Bash shell user type the set command. Csh or Tcsh user type the printenv command.

How do you print a variable value in Unix?

To Print the value of above variables, use echo command as shown below :

1. # echo $HOME. # echo $USERNAME.
2. $ cat myscript.
3. #!/bin/bash. # display user information from the system. …
4. $ echo “The cost of the item is $15” …
5. $ echo “The cost of the item is $15” …
6. var1=10. …
7. $ cat test3. …
8. Running the script produces the following output:

How do you print a variable in Shell?

To display the value of a variable, either use echo or printf command as follows:

1. echo $varName # not advisable unless you know what the variable contains.
2. echo “$varName”
3. printf “%sn” “$varName”

How print all variables in Linux?

Linux List All Environment Variables Command

1. printenv command – Print all or part of environment.
2. env command – Display all exported environment or run a program in a modified environment.
3. set command – List the name and value of each shell variable.

How do I export a variable in Linux?

To make an environment persistent for a user’s environment, we export the variable from the user’s profile script.

1. Open the current user’s profile into a text editor. vi ~/.bash_profile.
2. Add the export command for every environment variable you want to persist. export JAVA_HOME=/opt/openjdk11.
3. Save your changes.

How do I find the PATH variable in Linux?

Display your path environment variable.

When you type a command, the shell looks for it in the directories specified by your path. You can use echo $PATH to find which directories your shell is set to check for executable files. To do so: Type echo $PATH at the command prompt and press ↵ Enter .

How do you set a variable in UNIX?

Set environment variables on UNIX

1. At the system prompt on the command line. When you set an environment variable at the system prompt, you must reassign it the next time you log-in to the system.
2. In an environment-configuration file such as $INFORMIXDIR/etc/informix.rc or .informix. …
3. In your .profile or .login file.

How do you set a value to a variable in UNIX?

Unix / Linux – Using Shell Variables

1. Defining Variables. Variables are defined as follows − variable_name=variable_value. …
2. Accessing Values. To access the value stored in a variable, prefix its name with the dollar sign ($) − …
3. Read-only Variables. …
4. Unsetting Variables.

Which command is used to display variable values?

Summary:

How do you set a variable in Bash?

The easiest way to set environment variables in Bash is to use the “export” keyword followed by the variable name, an equal sign and the value to be assigned to the environment variable.

How do I print a variable in Bash?

After typing in this program in your Bash file, you need to save it by pressing Ctrl +S and then close it. In this program, the echo command and the printf command is used to print the output on the console.

What is environment variable in shell script?

Environment variables – Variables that are exported to all processes spawned by the shell. Their settings can be seen with the env command. … In the C shell, a set of these shell variables have a special relationship to a corresponding set of environment variables. These shell variables are user, term, home, and path.