10+ Credit Fair Interview Questions and Answers

To edit an existing file on a Linux server, you can use a text editor like Vim or Nano.

• Use a text editor like Vim or Nano to open the file for editing

• Make the necessary changes to the file

• Save the changes and exit the text editor

To check the current path/directory, use the 'pwd' command in Unix/Linux or 'cd' command in Windows.

• In Unix/Linux, type 'pwd' and press Enter

• In Windows, type 'cd' and press Enter

To check the computer name or hostname in Linux, you can use the 'hostname' command.

• Use the 'hostname' command to display the current hostname of the system.

• To change the hostname, use the 'hostnamectl set-hostname' command followed by the new hostname.

• To view the fully qualified domain name (FQDN), use the 'hostname -f' command.

To check the current user in Linux terminal, you can use the 'whoami' command.

• Use the 'whoami' command to display the current user's username.

• Alternatively, you can also use the 'id' command to display information about the current user.

The command 'chmod' is used to change permissions of a file in Linux.

• Use 'chmod' command followed by the permission code and the file name to change permissions of a file.

• For example, 'chmod 755 file.txt' will give read, write, and execute permissions to the owner, and read and execute permissions to group and others.

Relative paths are based on the current directory, while absolute paths start from the root directory.

• Relative paths are shorter and do not include the full path from the root directory.

• Absolute paths start from the root directory and include the full path to the file or directory.

• Example of relative path: 'folder/file.txt'

• Example of absolute path: '/home/user/folder/file.txt'

To search for a string in a file, you can use tools like grep or findstr.

• Use the grep command in Unix/Linux systems: grep 'search_string' file_name

• Use the findstr command in Windows systems: findstr 'search_string' file_name

• You can also use text editors like Vim or Notepad++ to search for a string in a file

The echo command is used to display a line of text or a variable value in the terminal.

• Used to print text or variable values to the terminal

• Can be used to create simple scripts or display messages to users

• Commonly used in shell scripting to output information

To rename a file in Linux, you can use the 'mv' command.

• Use the 'mv' command followed by the current file name and the new file name

• Make sure to specify the full path if the file is not in the current directory

• You can also use relative paths for the file names