Linux Administration 1

Explore how the grep command works with a sample temp dot txt, searching lines by patterns like apple, ap, and lines starting with a, x, or grape.

Explore grep's case-insensitive search using the -i option, with examples showing how apple matches regardless of lowercase or uppercase letters.

Use grep to search for a pattern across multiple files and directories, including recursive searches with the -R option, and view file names alongside matched lines.

Explore how to use grep with the dash v invert option to display only lines that do not contain a given pattern in temp.txt, including patterns like grep and ra.

Master the cd command to move between directories, using home, root, and print working directory, and employ cd dash and cd dot dot to switch to previous and parent directories.

Explore redirection operators and piping in Linux. Redirect ls output to a file with '>' and pipe to less, and compare terminal column behavior between Linux and Unix.

Learn to configure systemd by creating a basic service and a timer, manage with systemctl, enable at boot, and observe logs to understand timer-driven execution.

Explore linux logging with syslog and rsyslog, covering installation, configuration in /etc/rsyslog.conf, filtering by facility and severity, templates, remote logging, and log rotation.

Place a dash before the log file name in configuration files to disable sync on each log entry, boosting performance; since version 3, default is non-synchronizing.

Learn to compile squid from source, enable ssl bump and delay pools, and manage builds with make, make check, and make install, including time, nice, and rc stabilizer usage.

Compare sudo and su -, showing that sudo runs a single command as root with the user password and logs activity, while su - opens a root login shell.