Search help

man yum
man yum.conf

Mount cdrom :

lsblk
mkdir -p /mnt/cdrom
mount -r -t auto /dev/sr0 /mnt/cdrom

Create Local repo :

yum install createrepo
cp /mnt/cdroom/repodata/k2j34kj23k4j324k-c7-x86_64-comps.xml /repo/comps.xml
createrepo -g /repo/comps.xml /repo/Packages
yum clean all

nano >>
  [my-repo-id]
  name=My Repo Name
  baseurl=file:///repo/Packages
  enabled=1
  gpgcheck=0

Search Packages:

yum whatprovides */semanage
yum provides */semanage
yum --disablerepo=** --enablerepo=local-repo search

Work with yum :

yum list installed
yum groups list hidden
yum groups info “Basic Web Server"

Work with history :

yum history
yum history info 4
yum history undo 4

Work with rpm :

rpm -qa  —all packages
rpm -ql htop
rpm --query --state htop
rpm -q -f /usr/bin/passwd -d  -vv