Lab

Preparation

1. Download the chrome extension for SSH (link)
2. Login to the lab by typing “ssh “
3. then paste this “student@35.232.213.76″

Execution

1. To execute the program in the lab it is a must to remember few commands.
2. File naming convention:
   • <last4digitofregistrationno>_firstname_programno.c
   • Like Registration No: 205237001, Name: Aakash Singh
   • File Name: 7001_aakash_01.c, 7001_aakash_02.c, 7001_aakash_03.c
3. Create a file with the name and programno
   • To create a file an editor is a must to write programs. Here you will be having VI editor to use.
   • VI editor works in three modes, out of which you only need two to learn.
     • Insert Mode (enter by pressing ‘i‘)
     • Command Mode (enter by pressing ‘ESC‘)
   • Saving a file needs a command to execute. Like to save a file, first press ‘ESC‘ then type ‘:wq‘ (this will be visible in left down corner)
   • vi 7001_aakash_01.c -> (Press ‘i’)->(Write your program)->(Press ‘ESC‘)-><type ‘:wq‘)
4. Edit a file: To edit a file simply type the same command vi 7001_aakash_01.c, if the is already present it will open the file otherwise it will create a new file.
5. Execute a file
   • To execute a file
   • First Compile the file: gcc 7001_aakash_01.c -o 7001_aakash_01
   • if there is any error it will show it, otherwise run the following command.
   • Run the output file: ./7001_aakash_01
6. See the output of the file
7. For More Reference: See below screenshots-

Insert Mode and Writing a Program

Save and Quit after pressing ESC

gcc compiler file compile process and execution