Below are some linux basic questions which are generally asked by the interviewer.
Question1: what we must check first if we get, cant connect to local MySQL server through socket /var/mysql/mysql.sock on typing at shell prompt mysql?
Answer: First we check if mysql is running or not using commands service mysql status or service mysqld status. We start the service if mysql service is not running.
Question2: What is GNU
Answer: GNU stands for GNUs not Unix. The Project "GNU's Not Unix!" was started to develop a free software operating system.
Question3:The default port for Apache/Http
Answer: Apache/Http is configured on port 80 by default .
Question4: Primary Partitions possible on one drive?
Answer: Maximum of 4 primary partition possible on a drive.
Question5: Adding a new user to the system.?
Answer: Answer :We will add a new user to the Linux system using the bellow commands i.e.,
Question6: What is LILO?
Answer: LILO is a boot loader for Linux. It is used mainly to load the Linux operating system into main memory so that it can begin its operations.
Question7: Command to rename a file in Linux.?
Answer: The mv command is used to rename a file in Linux.
Question8: Which command is used to create and display file in Linux?
Answer: The cat command is used to create and display file in Linux.
Question9: Which protocol layer is responsible for user and the application program support such as passwords, resource sharing, file transfer and network management?
Answer: The Layer 7 Protocol is responsible for user and the application program support.
Question10: Command that will look for files with an extension txt, and has the occurrence of the string desktop in it
Answer: Find ./ -name *.txt | xargs grep i desktop
Question11: How can we change the permissions under Linux
Answer: We use chmod command to grant permission. Use + symbol to add permission or - symbol to deny permission, with any of the letters: u (user), g (group), o (others), a (all), r (read), w (write) and x (execute). For example the command to grant read and write access to the file testfile.txt for groups and others is: chmod go+rw testfile.txt.