linuxexpert-practice-labs/labs/rhcsa/1-7-system-documentation/README.md

RHCSA 1.7: System documentation

Man page sections, finding a setting without the internet, the man page index, and the documentation a package installs.

Before you start

The lab moves the man page index away (/var/cache/man/index.db), so man -k and whatis find nothing until you rebuild it in task 3. Write your findings to the files in /root/lab-answers/ named in the tasks.

Tasks

1. Find which man page section documents the format of /etc/crontab, and open that page. Write the section number to /root/lab-answers/1.
2. Without the internet, find the sshd_config keyword that sets the maximum number of authentication attempts per connection. Write the keyword and its current value, as sshd -T shows them (for example logingracetime 120), to /root/lab-answers/2.
3. As root, rebuild the man page index, then search it for timers. man -k timer should list systemd.timer (5).
4. List every documentation file installed by the sudo package and find its example sudoers file. Write its full path to /root/lab-answers/4.

Hints

• man -k crontab and whatis crontab need the index (task 3); man -aw crontab lists the pages without it. Section 5 is file formats.
• man sshd_config, then / to search; sudo sshd -T | grep -i.
• mandb.
• rpm -qd sudo.