Where Can I Get Help on Linux Commands?
Need help figuring out what a command is supposed to do? In an operating system with strange-sounding commands like >awk, >grep, and >sed, it's not surprising. The >man command (short for manual) is a source of online help for most Linux commands . For example, you can enter> man grep>
to learn all the secrets of the very useful >grep command. (For a summary of the most-used Li nux commands, see the section "Important Linux Commands").>
If >man claims no knowledge of the command in which you're interested, try >help instead. This command will list all the built-in bash commands with a brief syntax summary.>
Another help format called info is more powerful, since it provides hypertext links to make reading large documents much easier, but not all documentation is available in info format. T here are some very complete info documents on various aspects of Red Hat (especially the portions from the GNU project). >
To try it out, use the >info command without any arguments. It will present you with a list o f available documentation. Press >h to read the help for first-time users, or use the >tab key to move the cursor to a topic link and then press >enter to follow the link. Pressing >p returns you t o the previous page, >n moves you to the next page, and >u goes up one level of documentation. To exit info, press >q.>
For more information on the man command, see the man manual.
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