Linux Administration and Support Training

Managing the boot process

• Following the boot sequence
• Controlling services with systemctl

Rescuing an unbootable system

• Troubleshooting a boot loader
• Recovering with rescue media

Users and groups

• Enforcing access control policy with Pluggable Authentication Modules (PAM)
• Assigning users to groups
• Establishing and modifying accounts

Process control and logging

• ps
• pstree
• top
• vmstat
• Examining the /proc file system
• Signalling processes with kill and pkill
• Capturing important events with journalctl
• Meeting compliance requirements with journald and syslog

Device and volume management

• Installing new disks
• Establishing and extending logical volumes

Mounting file systems

• Creating and tuning journaled file systems
• Attaching to network file servers

Ensuring availability

• Backing up and restoring data
• Archiving system configuration

Managing software packages

• Manipulating portable tar archives
• Installing software with Red Hat Package Manager (RPM) to blend Red Hat with CentOS and other Linux distributions

Building software from source

• Working with SRPMs and packaging binary RPMs
• Resolving dependency issues with yum

Connecting to an IP network

• Setting IPv4 addresses and netmasks
• Configuring and testing IPv6 connectivity

Controlling network services

• Providing multiple websites with Apache virtual hosting
• Securing services with access control

Service for UNIX and Mac OS X clients

• Offering local and network print services
• Sharing files with NFS

Service for Windows clients

• Emulating Windows services with Samba
• Authenticating users

Kernel building and configuration

• Probing the PCI bus with lspci
• Discovering new hardware with sysfs
• Inserting new device drivers
• Determining required functionality

Running high–performance clusters

• Balancing network load with Linux Virtual Server (LVS)
• Ensuring high availability with keepalived