🐧 Linux & the Command Line
Administer Linux the way the LFCS exam tests it — essential commands, operations & packages, systemd services, users & permissions, networking, and storage. Preps you for the Linux Foundation Certified System Administrator (LFCS) exam.
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Essential commands
Move confidently around the shell: wrangle files and links, slice text with grep/sed/awk, lock down permissions via chmod, and pack it all into tar archives.
Operations & packages
Take command of a running system: control boot targets, tune the kernel with sysctl, reprioritize processes, schedule jobs, install packages, and navigate SELinux.
Chapter review
Chapter 1 review — Commands & operations
Lab: Files, processes & packages · 10-question check
Service & system config
Author your own systemd units, chase down failures in journalctl logs, keep clocks honest with chrony, and run rootless containers using podman.
Users, groups & permissions
Decide exactly who can do what: provision users and groups, grant sudo through sudoers, layer on ACLs and resource limits, and wire up PAM and LDAP.
Chapter review
Chapter 2 review — Services & users
Lab: Stand up a service and a user · 10-question check
Networking
Get a box talking to the world: configure interfaces with ip and nmcli, fix name resolution, gate traffic with firewalld and nftables, harden sshd, and debug when it breaks.
Storage & filesystems
Give data a reliable home: partition disks, build filesystems, pin persistent mounts by UUID in fstab, grow storage with LVM, add swap and mdadm RAID, and share it over NFS.
Chapter review
Chapter 3 review — Network & storage
Lab: Connect and persist · 10-question check
Final exam
Linux & the Command Line — comprehensive capstone
Hands-on capstone + course-wide exam · scored to a role level