Unix

What is the purpose of the chmod command in UNIX? a) To change file permissions b) To change the ownership of a file c) To modify the content of a file d) To delete files Answer: a) To change file permissions Explanation: The chmod command in UNIX is used to change file permissions. File permissions […]

Which command in UNIX is used to remove an empty directory? a) rmdir b) rm c) deldir d) delete Answer: a) rmdir Explanation: The rmdir command in UNIX is used to remove an empty directory. If the directory contains any files or subdirectories, the command will not delete it, and an error message will be

What does the uptime command show in UNIX? a) The system’s uptime since the last reboot b) CPU usage c) Disk space usage d) List of active users Answer: a) The system’s uptime since the last reboot Explanation: The uptime command in UNIX displays how long the system has been running since its last reboot.

Which UNIX command is used to display the current system time and date? a) time b) date c) clock d) uptime Answer: b) date Explanation: The date command in UNIX displays the current system date and time. When you type date in the terminal, it outputs the current date and time in a standard format.

What does the du command display in UNIX? a) Disk usage of files and directories b) List of open files c) User information d) CPU usage Answer: a) Disk usage of files and directories Explanation: The du (disk usage) command in UNIX is used to estimate the disk space used by files and directories. By

What does the top command do in UNIX? a) Displays the contents of a file b) Shows system uptime c) Displays real-time information about running processes d) Lists all files in a directory Answer: c) Displays real-time information about running processes Explanation: The top command in UNIX displays real-time information about running processes, including CPU

What does the df command display in UNIX? a) Disk space usage b) File system type c) Memory usage d) List of files in a directory Answer: a) Disk space usage Explanation: The df command in UNIX is used to display information about disk space usage. It provides details such as the total size of

How do you display all currently logged-in users in UNIX? a) who b) w c) users d) All of the above Answer: d) All of the above Explanation: The who, w, and users commands can all be used to display information about logged-in users. The who command shows detailed information such as usernames, terminal names,

What does the tail command do in UNIX? a) Displays the last few lines of a file b) Displays the first few lines of a file c) Shows the contents of a file d) Lists files in a directory Answer: a) Displays the last few lines of a file Explanation: The tail command in UNIX

Which command is used to display the first few lines of a file in UNIX? a) head b) tail c) cat d) more Answer: a) head Explanation: The head command in UNIX is used to display the first few lines of a file. By default, it shows the first 10 lines, but you can specify

What is the purpose of the grep command in UNIX? a) To find and display lines in a file that match a pattern b) To list the files in a directory c) To remove files from the system d) To count the number of lines in a file Answer: a) To find and display lines

Which command in UNIX is used to count the number of lines, words, and characters in a file? a) wc b) count c) nl d) grep Answer: a) wc Explanation: The wc (word count) command in UNIX is used to count the number of lines, words, and characters in a file. By default, it shows

Which command is used to move files in UNIX? a) cp b) mv c) rm d) move Answer: b) mv Explanation: The mv command in UNIX is used to move files or directories from one location to another. It can also be used to rename files. For example, mv file1 /path/to/destination will move file1 to

What is the function of the man command in UNIX? a) To manage system resources b) To display manual pages for commands c) To monitor network activity d) To display memory usage Answer: b) To display manual pages for commands Explanation: The man command in UNIX stands for “manual” and is used to display the

What is the default text editor in UNIX? a) emacs b) nano c) vi d) gedit Answer: c) vi Explanation: The vi editor is the default text editor in many UNIX systems. It is a powerful text editor that provides advanced editing features, although it has a steep learning curve compared to simpler editors like

Which command is used to copy files in UNIX? a) cp b) mv c) rm d) copy Answer: a) cp Explanation: The cp command in UNIX is used to copy files and directories from one location to another. Its syntax is cp source destination, where source is the file to be copied and destination is

Which command is used to change the ownership of a file in UNIX? a) chown b) chgrp c) chmod d) own Answer: a) chown Explanation: The chown command in UNIX is used to change the ownership of a file or directory. The basic syntax is chown new_owner filename, where new_owner is the username of the

Which command is used to terminate a process in UNIX? a) end b) kill c) stop d) quit Answer: b) kill Explanation: The kill command in UNIX is used to terminate a running process. It works by sending a signal to the process, which can either stop it immediately or allow for a more graceful

What does the ps command do in UNIX? a) Shows the list of currently running processes b) Prints system information c) Stops a running process d) Powers off the system Answer: a) Shows the list of currently running processes Explanation: The ps command in UNIX is used to display information about the currently running processes.

What does the chmod command do in UNIX? a) Changes the owner of a file b) Changes the permissions of a file c) Modifies the file content d) Deletes a file Answer: b) Changes the permissions of a file Explanation: The chmod command in UNIX is used to change the permissions of a file or

Which UNIX command is used to remove a file? a) rm b) mv c) delete d) erase Answer: a) rm Explanation: The rm command is used to remove files in UNIX. When you use rm filename, it deletes the specified file from the directory. If you want to remove directories along with files, you can

Which UNIX command is used to create a new directory? a) touch b) mkdir c) rmdir d) cp Answer: b) mkdir Explanation: The mkdir command in UNIX is used to create a new directory. The syntax is simple: mkdir directory_name. This command allows users to create directories, which act as containers for files and subdirectories,

What is the use of the ls command in UNIX? a) It lists files and directories in the current directory b) It creates a new directory c) It deletes a file d) It changes the current directory Answer: a) It lists files and directories in the current directory Explanation: The ls command in UNIX is

Which command is used to display the current directory in UNIX? a) pwd b) ls c) cd d) dir Answer: a) pwd Explanation: The pwd command in UNIX is used to print the current working directory. It stands for “print working directory,” and its function is to show the full path of the directory you

What does UNIX stand for? a) Universal Internet Exchange b) Uniplexed Information and Computing System c) Unorganized Information Network d) United Interface Network Exchange Answer: b) Uniplexed Information and Computing System Explanation: UNIX stands for Uniplexed Information and Computing System. It is a powerful operating system developed in the 1970s at Bell Labs. Originally, UNIX