Git Essentials

May 6, 2017

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This chapter is from the book 

Linux for Developers: Jumpstart Your Linux Programming Skills

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Installing Git

You might already have Git¹ on your system because it is sometimes installed by default (or another administrator might have installed it). If you have access to the system as a regular user, you can execute the following command to determine whether you have Git installed:

ocs@ubuntu:~$ which git
/usr/bin/git

If Git is installed, then the path to the git command is provided, as shown in the preceding command. If it isn’t installed, then you either get no output or an error like the following:

[ocs@centos ~]# which git
/usr/bin/which: no git in (/usr/lib64/qt-3.3/bin:/usr/local/bin:/usr/local/sbin:/usr/
bin:/usr/sbin:/bin:/sbin:/root/bin)

As an administrator on a Debian-based system, you could use the dpkg command to determine whether the git package has been installed:

root@ubuntu:~# dpkg -l git
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/
➥Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name     Version       Architecture  Description
+++-========-=============-=============-========================================
ii  git      1:1.9.1-1ubun amd64         fast, scalable, distributed
➥revision con

As an administrator on a Red Hat–based system, you could use the rpm command to determine whether the git package has been installed:

[root@centos ~]# rpm -q git
git-1.8.3.1-6.el7_2.1.x86_64

If Git isn’t installed on your system, you must either log in as the root user or use sudo or su to install the software. If you are logged in as the root user on a Debian-based system, you can use the following command to install Git:

apt-get install git

If you are logged in as the root user on a Red Hat–based system, you can use the following command to install Git:

yum install git

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