Red Hat System Administration I
In this exercise, you will look up information stored in GNU Info documents by navigating those documents with command-line tools.
Outcomes
You should be able to navigate GNU Info documentation with command-line tools.
Log in to workstation as student using student as the password.
On workstation, run the lab help-info start command.
[student@workstation ~]$lab help-info start
On
workstationlaunch pinfo without any arguments.[student@workstation ~]$pinfoNavigate to the
Common optionstopic.Use UpArrow or DownArrow until
(coreutils) Common optionsis highlighted.
Figure 4.2: Bash documentationPress Enter to view this topic.
Figure 4.3: Common options info topicBrowse through this Info topic. Learn whether long-style options can be abbreviated.
Use PageUp and PageDown to navigate through the topic. Yes, many programs allow long options to be abbreviated.
Determine what the symbols
--signify when used as a command argument.The symbols
--signify the end of command options and the start of command arguments in complex commands where the shell's command-line parser might not correctly make the distinction.Without exiting pinfo, move up to the
GNU Coreutilsnode.Press u to move up to the top node of the topic.
Return to the top level topic.
Press u again. Observe that when positioned at the top of a topic node, moving up returns to the directory of topics. Alternately, pressing d from any level or topic moves directly to the directory of topics.
Search for the pattern
coreutilsand select that topic.Press / followed by the search pattern “coreutils”. With the topic highlighted, press Enter.
Figure 4.4: Search resultIn the menu at the top, locate and select
Output of entire filesby pressing n. Browse the topic.Use Enter to select
cat invocation. Use the arrow keys to browse the topic.Move up two levels to return to
GNU Coreutils. Move toSummarizing files.Press Enter to select the topic then browse the topic.
Press q to quit pinfo.
Use the pinfo command again, specifying
coreutilsas the destination topic from the command line.[student@workstation ~]$pinfo coreutilsSelect the
Disk usagetopic.Press DownArrow to highlight
Disk usage, then press Enter to select this topic.Read the
df invocationanddu invocationsubtopics.Use arrow keys to highlight a topic, PageUp and PageDown to browse the text, then press u to move up one level. Press q to quit when you are finished.
This concludes the guided exercise.
