Often you have to type in the same command multiple times. You can either use our up/down arrow keys or preferably use the shell history. Learn how to execute commands on certain lines of the history. Learn how to re-execute entire lines as well as appending the arguments from the previous line onto our current one.
- [Instructor] Using the shell's history can keep you from…having to type in commands over again.…If you want to just bring up the last command,…you may want to use your up and down arrow keys.…If you want to see what commands you've typed in,…use the history command, by typing in history into a shell.…History shows the most recent commands we've typed,…up to the shell limit.…The limit is usually 500 or 1,000 items,…depending on the configuration.…If you want to bring back the entire last line…from the history, type in !!…and hit enter.…
In my case, it's the history command,…which we just typed in.…If you want to execute the command…four lines from the bottom,…you'll use !-4…and hit enter.…Type in history again to see the list.…We can see that four lines from the bottom…was the clear command for me.…For you, it may be something else.…If you want to run a specific line,…just specify the number after the !…For instance, to run the command on line seven,…you would type in !7 and hit enter.…
If you do not have a seventh item,…
- Write the command that will take you to the most recent directory.
- Write the command that brings back the arguments and options from the previous line.
- Explain what extended globs can do.
- Identify the access.conf line that will restrict all users from using the cron service except for the user named bob.
- List the line that will get a list of only running services.
- Identify what typing ‘systemctl enable crond’ will do.
Skill Level Intermediate
Linux: User and Group Managementwith Grant McWilliams1h 8m Intermediate
1. Linux Shells Overview
2. Using the Bash Shell
3. Linux Processes
4. Job Scheduling
5. System Services
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