RHEL

• What is yum and how do I use it? https://access.redhat.com/solutions/9934

yum is the primary tool for getting, installing, deleting, querying, and managing Red Hat Enterprise Linux RPM software packages from official Red Hat software repositories, as well as other third-party repositories. yum is used in Red Hat Enterprise Linux versions 5 and later. Versions of Red Hat Enterprise Linux 4 and earlier used up2date.

https://access.redhat.com/articles/yum-cheat-sheet

RHEL 7 https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/system_administrators_guide/ch-yum

yum search libcurl
yum list installed | grep libcurl

# better
sudo yum list *libcurl*

# configure dynamic linker run-time bindings
ldconfig -p | grep libcurl

Obtaining information about control groups - https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/resource_management_guide/sec-obtaining_information_about_control_groups

systemctl show user.slice

https://www.certdepot.net/rhel7-get-started-cgroups/

Fresh install

# check for update
sudo yum check-update

# update all packages and dependencies
sudo yum update

# searching
sudo yum search ssh

# install
sudo yum install ssh

# ssh
sudo yum install openssh-clients.x86_64

Uninstall

sudo yum remove ssh