Checking for installed packages and if not found install

Question

I need to check for installed packages and if not installed install them.

Example for RHEL, CentOS, Fedora:

rpm -qa | grep glibc-static glibc-static-2.12-1.80.el6_3.5.i686 

How do I do a check in BASH?

Do I do something like?

if [ "$(rpm -qa | grep glibc-static)" != "" ] ; then 

And what do I need to use for other distributions? apt-get?

Answer 1

Try the following code :

if ! rpm -qa | grep -qw glibc-static; then     yum install glibc-static fi 

or shorter :

rpm -qa | grep -qw glibc-static || yum install glibc-static 

---

For debian likes :

dpkg -l | grep -qw package || apt-get install package 

For archlinux :

pacman -Qq | grep -qw package || pacman -S package 

Answer 2

Based on @GillesQuenot and @Kidbulra answers, here's an example how to loop over multiple packages, and install if missing:

packageList="git gcc python-devel"  for packageName in $packageList; do   rpm --quiet --query $packageName || sudo yum install -y $packageName done