Unix Commands

admin on June 3rd, 2015

UNIX COMMANDS   $ LOGNAME : It displays the current user information $PWD : present working directory $DATE : It displays the system date & time 4. $clear           : To clear the screen 5. $cal : it current month and year $cal 2000           : Displays the 2000 year calendar $cal 8 2006 : […]

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admin on June 3rd, 2015

Difference between the output of echo ** and echo * * echo ** lists all the filenames in the current directory.. echo * * lists all the filenames in the current directory twice.   The other way of running shell script apart from using sh command and chmod? ans:- using ! we can run a […]

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admin on June 3rd, 2015

What’s the command to find out today’s date? date What’s the command to find out users on the system? who How do you find out the current directory you’re in? pwd What is the command to see the location of command? Whereis  <commandname> How do you find out your own username?  Whoami    (or)  logname How […]

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Password protection. File permissions. Encryption.

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admin on June 3rd, 2015

Any operating system designed based on unix kernel called as flavour of unix. The following are some flavours of unix Linux —- Red Hat Sun solaris — Sun Microsystem IBM-AIX —– IBM Hp-ux —– HP Sco-unix —– santa crus operations IRIX—— Silicon Graphics.

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admin on June 3rd, 2015

Kernel is core part of unix o/s. It is a group of hundreds of system calls.

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admin on June 3rd, 2015

Shell is a command line interpreter. Shell acts as an  interface between user and the kernel.

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