Entries Tagged as ''

Special Variables in the Bourne Shell

The Bourne shell defines several special variables are useful in the scripts. Following are some of the predefined variables.

Predefined Variable

Tags: Linux by hengdu
No Comments »

Sequence for login

Quick post for the sequence for login Unix (Linux) shell, since we may not know some procedures in details.

  1. The system is connected to a tty (user port)
  2. The kernel invokes the getty program
  3. A login prompt is displayed continuously monitoring the communication port for any type of input.
  4. Control is passed on by invoking the program name found in the user’s entry in the password file.

Tags: Linux by hengdu
No Comments »