Make sure you are familiar with the following content:
/usr/share/man - Location of man page files/usr/share/info - Location of info files/usr/share/docCommands:
Searches for files in a directory hierarchy.
Common options for find:
-f - files-d - directories-l - links-user - File is owned by user (numeric user ID allowed)! Is the same as -not'locate' is faster than 'find' because it has its own database (prepared by updatedb).
# which locate
/usr/bin/locate
📝 NOTE: it looks like locate is installed with the systemd timer and 'updatedb'. For the test if the binary locate is not installed, look for mlocate with dnf
Update the DB manually
# updatedb
If you need to enable automatic update of the locate database on RHEL 8, you can do so by enabling the systemd timer
# systemctl status mlocate-updatedb.timer
● mlocate-updatedb.timer - Updates mlocate database every day
Loaded: loaded (/usr/lib/systemd/system/mlocate-updatedb.timer; disabled; vendor preset: disabled)
Active: inactive (dead)
Trigger: n/a
# systemctl enable --now mlocate-updatedb.timer
systemctl enable --now mlocate-updatedb.timer
Created symlink /etc/systemd/system/timers.target.wants/mlocate-updatedb.timer → /usr/lib/systemd/system/mlocate-updatedb.timer.
# systemctl status mlocate-updatedb.timer
● mlocate-updatedb.timer - Updates mlocate database every day
Loaded: loaded (/usr/lib/systemd/system/mlocate-updatedb.timer; enabled; vendor preset: disabled)
Active: active (waiting) since Mon 2020-12-07 15:33:02 EST; 6s ago
Trigger: Tue 2020-12-08 00:00:00 EST; 8h left
Dec 07 15:33:02 rhel8.localdomain systemd[1]: Started Updates mlocate database every day.
The mlocate version published in RHEL8 does not create the /etc/cron.daily/mlocate to automatically run the updatedb daily. A systemd.timer named mlocate-updatedb.timer has replaced the cron. However, in RHEL 8 the mlocate-updatedb.timer is disabled by default.
Use dnf whatprovides to find out what package (in the repo) provides a file or package.
# dnf whatprovides /etc/ssh/sshd_config
Updating Subscription Management repositories.
Last metadata expiration check: 2:37:05 ago on Thu 12 Nov 2020 01:52:19 PM EST.
openssh-server-7.8p1-4.el8.x86_64 : An open source SSH server daemon
Repo : rhel-8-for-x86_64-baseos-rpms
Matched from:
Filename : /etc/ssh/sshd_config
openssh-server-8.0p1-3.el8.x86_64 : An open source SSH server daemon
Repo : rhel-8-for-x86_64-baseos-rpms
Matched from:
Filename : /etc/ssh/sshd_config
openssh-server-8.0p1-4.el8_1.x86_64 : An open source SSH server daemon
Repo : rhel-8-for-x86_64-baseos-rpms
Matched from:
Filename : /etc/ssh/sshd_config
openssh-server-8.0p1-5.el8.x86_64 : An open source SSH server daemon
Repo : @System
Matched from:
Filename : /etc/ssh/sshd_config
openssh-server-8.0p1-5.el8.x86_64 : An open source SSH server daemon
Repo : rhel-8-for-x86_64-baseos-rpms
Matched from:
Filename : /etc/ssh/sshd_config
# dnf repoquery whatprovides /etc/ssh/sshd_config
Updating Subscription Management repositories.
Last metadata expiration check: 2:37:52 ago on Thu 12 Nov 2020 01:52:19 PM EST.
openssh-server-0:7.8p1-4.el8.x86_64
openssh-server-0:8.0p1-3.el8.x86_64
openssh-server-0:8.0p1-4.el8_1.x86_64
openssh-server-0:8.0p1-5.el8.x86_64
📝 NOTE: You can use either the full path of the file/binary or a wildcard (like `/sshd_config`)*
# rpm –ql package name
# rpm -qd openssh-server-8.0p1-5.el8.x86_64
/usr/share/man/man5/moduli.5.gz
/usr/share/man/man5/sshd_config.5.gz
/usr/share/man/man8/sftp-server.8.gz
/usr/share/man/man8/sshd.8.gz
📌 EXAM TIP: If you can't remember where the docs or info files are, use rpm or locate with grep.
Using rpm
Find the full package name
# rpm -qa | grep rsync
rsync-3.1.3-9.el8.x86_64
Use rpm -ql [package name]
# rpm -ql rsync-3.1.3-9.el8.x86_64 | egrep '(doc|man)'
/usr/share/doc/rsync
/usr/share/doc/rsync/NEWS
/usr/share/doc/rsync/OLDNEWS
/usr/share/doc/rsync/README
/usr/share/doc/rsync/support
/usr/share/doc/rsync/support/Makefile
/usr/share/doc/rsync/support/atomic-rsync
/usr/share/doc/rsync/support/cvs2includes
/usr/share/doc/rsync/support/deny-rsync
/usr/share/doc/rsync/support/file-attr-restore
/usr/share/doc/rsync/support/files-to-excludes
/usr/share/doc/rsync/support/git-set-file-times
/usr/share/doc/rsync/support/instant-rsyncd
/usr/share/doc/rsync/support/logfilter
/usr/share/doc/rsync/support/lsh
/usr/share/doc/rsync/support/lsh.sh
/usr/share/doc/rsync/support/mapfrom
/usr/share/doc/rsync/support/mapto
/usr/share/doc/rsync/support/mnt-excl
/usr/share/doc/rsync/support/munge-symlinks
/usr/share/doc/rsync/support/rrsync
/usr/share/doc/rsync/support/rsync-no-vanished
/usr/share/doc/rsync/support/rsync-slash-strip
/usr/share/doc/rsync/support/rsyncstats
/usr/share/doc/rsync/support/savetransfer.c
/usr/share/doc/rsync/tech_report.tex
/usr/share/man/man1/rsync.1.gz
Using locate
# locate rsync | egrep '(doc|man)'
/usr/share/doc/rsync
/usr/share/doc/rsync/NEWS
/usr/share/doc/rsync/OLDNEWS
/usr/share/doc/rsync/README
/usr/share/doc/rsync/support
/usr/share/doc/rsync/tech_report.tex
/usr/share/doc/rsync/support/Makefile
/usr/share/doc/rsync/support/atomic-rsync
/usr/share/doc/rsync/support/cvs2includes
/usr/share/doc/rsync/support/deny-rsync
/usr/share/doc/rsync/support/file-attr-restore
/usr/share/doc/rsync/support/files-to-excludes
/usr/share/doc/rsync/support/git-set-file-times
/usr/share/doc/rsync/support/instant-rsyncd
/usr/share/doc/rsync/support/logfilter
/usr/share/doc/rsync/support/lsh
/usr/share/doc/rsync/support/lsh.sh
/usr/share/doc/rsync/support/mapfrom
/usr/share/doc/rsync/support/mapto
/usr/share/doc/rsync/support/mnt-excl
/usr/share/doc/rsync/support/munge-symlinks
/usr/share/doc/rsync/support/rrsync
/usr/share/doc/rsync/support/rsync-no-vanished
/usr/share/doc/rsync/support/rsync-slash-strip
/usr/share/doc/rsync/support/rsyncstats
/usr/share/doc/rsync/support/savetransfer.c
/usr/share/man/man1/rsync.1.gz