$HOME: Gives path of home directory. $HOSTNAME: Gives name of the host. $LANG: Gives the default system language. $EDITOR: Gives default file editor.
WHAT IS HOME environment variable?
They are part of the environment in which a process runs. For example, a running process can query the value of the TEMP environment variable to discover a suitable location to store temporary files, or the HOME or USERPROFILE variable to find the directory structure owned by the user running the process.
What is a Unix environment variable?
Simply put, environment variables are variables that are set up in your shell when you log in. They are called “environment variables” because most of them affect the way your Unix shell works for you. … The env command (or printenv) will list all of the enviroment variables and their values.
Where is home defined Linux?
Default home directory per operating system
The file /etc/xdg/user-dirs. defaults on many Linux systems defines the subdirectories created for users by default.
What is an example of a system variable?
Examples of system variables include factors such as the instructions given to eyewitnesses prior to their viewing a lineup or the number of people who are used in a lineup. … In general, the impact of system variables is likely to depend somewhat on the levels of the estimator variables.
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 use environment variables?
Setting environment variables in windows take a more graphical approach. Go to Control PanelSystem and SecuritySystem and in the left panel, click on Advanced system settings . A popup dialog appears, click on environment variables. In the popup that appears, there are two sections.
What is environment variable in operating system?
Environment variables store information about the operating system environment. … The environment variables store data that is used by the operating system and other programs. For example, the WINDIR environment variable contains the location of the Windows installation directory.
How do you set a variable in Unix?
Set environment variables on UNIX
- 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.
- In an environment-configuration file such as $INFORMIXDIR/etc/informix.rc or .informix. …
- In your .profile or .login file.
What are the two types of shell variables?
A shell can have two types of variables:
- Environment variables – Variables that are exported to all processes spawned by the shell. Their settings can be seen with the env command. …
- Shell (local) variables – Variables that affect only the current shell.