Differentiate cmp command from diff command.
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Write a grep (or grep) command that selects the lines from a file that have exactly three characters.
Give a regular expression that finds two things, try to come up with regular expressions that find each individually using "egrep" command?
What is shrinking file system in AIX where it actually resides?
Is command prompt unix?
Is there any method to erase all files in the current directory, along with its all sub-directories, by using only one command?
Name the various commands that are used for the user information in unix.
Can you explain a little bit about command substitution?
How do you remove a crontab file?
How does shebang work?
what are the different operating systems available?
what is the command to find out which shell you are running?
What is the command to find hidden files in the current directory?