Often you have a process that we need to terminate by process ID number. For this task you can use the kill command. Kill sends the process a signal telling it to end itself. If that doesn't work you can send it a different signal that forcibly removes the process. You can also kill all processes with a certain name or even all processes that were started by a certain user.
- [Instructor] It's common to send signals to processes.…One of those signals would be terminate,…if you wanted to end the process.…If that doesn't work, we can forcibly kill a process…by sending a kill signal.…First, though, we need to know the process ID.…We've already talked about the PS command for this,…but we have a couple of other tools that are simpler.…In the terminal, type in pidof, space, crond,…and hit Enter.…Also type in pgrep, space, crond, and hit Enter.…
Pgrep is more powerful and allows us to filter…on a lot of items like username and command.…But for the purpose of just getting a process ID,…either will work fine.…Once we have the process ID,…we can use the kill command to send it a signal.…To list all possible signal types,…type in kill, space, -l, and hit enter.…There are 64 different signals,…but it's not common practice to use all of them.…Generally, we want to send the process…a non-destructive signal, like SIGHUB or SIGUSR1,…or we want to terminate a process with SIGTERM or SIGKILL.…
In many cases, SIGHUB forces a process…
- 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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