Shell scripts

Tip1:

• 1st command:
  # chown example:example
  /var/www/vhost/default-domain.com/httpdocs/example.html
• 2nd command:
  #^example.html^other.html
• The second command will substitute example.html with other.html and the result is:
  # chown example:example /var/www/vhost/default-domain.com/httpdocs/other.html

This is nice for long command especially when bash is not available.

Tip2:

• 1st command
  # ls /var/www/vhost/default-domain.com/httpdocs/example.html
• 2nd command
  # cat !^
• This time the second command it is executing cat with the argument of the last command and the result will be:
  # cat /var/www/vhost/default-domain.com/httpdocs/example.html
• In a similar way:
  !:2, !:3... are the second, third(and so on) arguments of the last command
  !-2, !-3, … are earlier commands
  !-2^, !-2:2, !-2$ will be the first, second and last argument of the pre-previouous command.
• And now the question: What is " !-2:0 -R !^ !-3:2 " ? :)