The which command is a helpful utility for finding the location of executable files in the system’s PATH. It is useful for determining the binary file being executed when multiple versions of the same program are installed or for troubleshooting purposes.
[root@geeks ~]# which grep -bash: which: command not found
In this short tutorial, we’ll explain how to install the which command on CentOS.
Step 1: Update Your System
Before installing any new packages, it’s a good practice to update your system. To update your CentOS system, run the following command:
sudo yum update -y
Step 2: Install Which Command
To install the which command on CentOS, run the following command:
sudo yum install which -y
This command installs the which package from the default CentOS repositories.
[root@CentOS57 ~]# yum install which Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * base: centos.ipserverone.com * extras: centos.ipserverone.com * updates: centos.ipserverone.com Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package which.i386 0:2.16-7 set to be updated --> Finished Dependency Resolution Dependencies Resolved =================================================================================================== Package Arch Version Repository Size =================================================================================================== Installing: which i386 2.16-7 base 23 k Transaction Summary =================================================================================================== Install 1 Package(s) Upgrade 0 Package(s) Total download size: 23 k Is this ok [y/N]: y Downloading Packages: which-2.16-7.i386.rpm | 23 kB 00:00 Running rpm_check_debug Running Transaction Test Finished Transaction Test Transaction Test Succeeded Running Transaction Installing : which 1/1 Installed: which.i386 0:2.16-7 Complete!
Step 3: Verify Which Command Installation
After the installation is complete, you can verify that the which command is installed and working correctly by running it with a common command, such as ls:
which ls
The output should display the full path to the ls command, which typically looks like this:
/usr/bin/ls
Programs Mentioned:
- which – A utility for finding the location of executable files in the system’s PATH, used for troubleshooting and managing installed programs on Unix-like operating systems.
Conclusion
In this guide, you have successfully installed the which command on your CentOS system. You can now use the which command to locate the full path of executable files in your system’s PATH, helping you troubleshoot and manage your installed programs more effectively.
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