RHEL

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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