5.2 The bash shell: commands, variables, history, help
5.3 Files and directories: FHS, file management, links, search
5.4 Streams, pipes, redirection and xargs
5.5 Text filters: cut, sort, uniq, tr, wc, head, tail
5.6 Regular expressions, grep and sed
5.7 The vi/vim editor and other editors
5.8 Archives and compression: tar, gzip, bzip2, xz, cpio, dd
rack 2 Users, permissions, packages 0/21 5.9 Users and groups
5.10 Passwords, aging and sudo
5.11 Permissions: rwx, chmod, chown, umask
5.12 SUID, SGID, sticky bit and ACLs
5.13 Debian and Ubuntu packages: dpkg and apt
5.14 RHEL packages: rpm, dnf, repositories and Flatpak
5.15 Shared libraries and software from source
rack 3 Processes, boot, services 0/20 5.16 Processes, signals and jobs
5.17 Process priorities, nohup and tmux
5.18 Boot process: UEFI, GRUB 2, kernel, initramfs
5.19 systemd: units, services and targets
5.20 Scheduling: cron, at and systemd timers
5.21 Logs: journald, rsyslog, logrotate
5.22 Time, locale and time zones
5.23 Hardware, kernel modules, udev and sysctl
rack 4 Disks and file systems 0/16 5.24 MBR and GPT partitions, disk layout
5.25 File systems ext4, XFS, VFAT, Btrfs and swap
5.26 Mounting: fstab, UUID, systemd mounts, autofs
5.27 Checking, repairing and free space
5.28 LVM: volumes, extending, snapshots
5.29 RAID, LUKS, Stratis and VDO
5.30 Network storage: NFS, SMB, iSCSI
5.31 TCP/IP for the Linux administrator
5.32 Network configuration: NetworkManager, netplan, systemd-networkd
5.33 Network troubleshooting: ip, ss, ping, tracepath, tcpdump
5.34 DNS client: resolv.conf, nsswitch, systemd-resolved, dig
5.35 Routes, bonds, bridges and VLANs
5.36 Firewall: firewalld, nftables, NAT and port forwarding
5.37 SSH: keys, server, tunnels, file transfer
rack 6 Scripting and automation 0/6 5.38 Shell environment: profiles, aliases, functions
5.39 Bash scripts: conditions, loops, arguments
5.40 Bash scripts in practice: command output, errors, reports
5.41 Git for administrators
5.42 Ansible: managing a server fleet
5.43 Host security: services, ports, limits, logins
5.44 SELinux
5.45 AppArmor
5.46 Encryption: GnuPG and OpenSSL certificates
5.47 Central accounts: LDAP, SSSD, domains
5.48 Auditing and hardening: auditd, updates, baselines
rack 8 Network services 0/7 5.49 Apache and Nginx web servers
5.50 Reverse proxy and load balancing: Nginx and HAProxy
5.51 BIND DNS server
5.52 NFS and Samba file servers
5.53 Mail: MTA, Postfix and aliases
5.54 PostgreSQL and MariaDB for administrators
5.55 CUPS printing and the desktop: X11, Wayland
rack 9 Virtualization and containers 0/4 5.56 Linux in VMs and the cloud: images, cloud-init
5.57 KVM and libvirt
5.58 Containers: Podman and Docker
5.59 Performance: top, vmstat, iostat, sar, tuned
5.60 The kernel: updates, parameters, building
5.61 Backup: rsync, tar, Borg, snapshots
5.62 Recovering from failures: rescue, root password, damaged file systems
5.63 High availability: keepalived and Pacemaker
5.64 Outage reviews and LPIC-1, RHCSA, LFCS preparation