This report is just a quick flyover of Linux commands and how to use them to do quick troubleshooting. Even with the commands covered in the report, I excluded many, many options to keep it simple. But sometimes, even in the heat of troubleshooting a system problem, you need a bit more help. This chapter covers where you can go to get it.
man (manual page) command provides documentation on commands,
system configuration files, and much more. This command is good for when
you can’t access the Internet, or doing so isn’t convenient because you
are on a machine console or similar setup. Figure 10-1 shows the first page of
The output is run through pagination similar to
less, so all its
navigation and find commands will work. You can, of course, find out more
about how to use
man by running
How do you know what you don’t know? Sometimes you might not know (or
remember) the name of a command. For example, you may recall that this
guide mentioned disk space, but can’t remember the actual commands.
Luckily, you can use the
apropos command to jog your memory, as shown in Figure 10-2.
apropos command is simple. All it does is ...