# which "command_name"
# which cp
alias cp='cp -i'
# which useradd
In case you get the below error# which samba
/usr/bin/which: no samba in (/usr/lib/qt-3.3/bin:/usr/local/sbin
It means your PATH variable does not contains the path for samba command. In that case which will not help you find the location of the command.
So, you can use the below command for the same purpose
# whereis command_name
# whereis useradd
useradd: /usr/sbin/useradd /usr/share/man/man8/useradd.8.gz
Follow the below links for more tutorials:
Tutorial for Monitoring Tools SAR and KSAR with examples in Linux
How to configure Samba 4 Secondary Domain Controller
How to secure Apache web server in Linux using password (.htaccess)
How to register Red Hat Linux with RHN (Red Hat Network )
Red hat Enterprise Linux 5.5 Installation Guide (Screenshots)
15 tips to enhance security of your Linux machine
Why is Linux more secure than windows and any other OS
What is the difference between "su" and "su -" in Linux?
What is kernel-PAE in Linux?
What is swappiness and how do we change its value?
How to log iptables messages in different log file
What are the s and k scripts in the etc rcx.d directories
How to check all the currently running services in Linux
How to auto start service after reboot in Linux
What is virtual memory, paging and swap space?