Unix - Study Mode

[#986] Which column contains all details of the permissions of a file when you issue the ls -l command?
Correct Answer

(D) first

Explanation

Solution: When you issue the ls -l command in Unix, the output displays detailed information about files and directories in the current directory. The first column in the output represents the permissions of the file or directory. This column provides information about read, write, and execute permissions for the owner, group, and others, respectively. So, Option D is the column that contains all details of the permissions of a file when you issue the ls -l command.

[#987] Which of the following commands is used to display your working directory?
Correct Answer

(C) pwd

Explanation

Solution: In Unix, the pwd command stands for "print working directory". When you issue this command, it displays the full pathname of the current working directory. This helps users to know which directory they are currently working in within the Unix filesystem. So, Option C is the command used to display your working directory in Unix.

[#988] While working with mail command, which command is used to save mail in a separate file?
Correct Answer

(C) w

Explanation

Solution: In Unix, when using the mail command to read or compose emails, the w command is used to save the mail in a separate file. After composing or reading an email, if you want to save it to a file, you can use the w command followed by the filename. This command writes the email content to the specified file. So, Option C is the command used to save mail in a separate file while working with the mail command in Unix.

[#989] The command used to compare the files is known as
Correct Answer

(B) cmp

Explanation

Solution: In Unix, the cmp command is used to compare two files byte by byte and determine whether their contents are identical or not. When you execute this command followed by the names of two files, it compares the files and provides information about the first byte where they differ, if any. So, Option B is the command used to compare files in Unix.

[#990] Which command is used to terminate a process?
Correct Answer

(D) kill

Explanation

Solution: In Unix, the kill command is used to terminate or send signals to processes. By default, it sends the TERM signal to a process, which instructs it to gracefully terminate. However, you can specify different signals using various options of the kill command. For instance, using kill -9 sends the KILL signal, which immediately terminates the process without allowing it to clean up. So, Option D is the command used to terminate a process in Unix.