A Linux administrator needs to restart a server and wants to see if any users are currently connected to it. Which of the following commands should the administrator run to find this information?
A Linux administrator is troubleshooting an SSHD issue on a server. Users are receiving error messages stating the connection is refused. Which of the following commands should be used to verify whether the service is listening?
A Linux administrator is changing the default system umask. The newly created files should have the -rw-r----- permission, and the newly created directories should have the drwxr----- permission. Which of the following commands should the administrator use?
A Linux administrator is working with a CPU-intensive program called data-analysis1. The administrator needs to prevent the program from monopolizing CPU resources and ensure that other critical processes are not impacted when the program starts. Which of the following commands would start the program with a reduced level of impact to the system?
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