To channel the output of one command or program into the input of another, you use:

The cal command...

To show the grand total, in kilobytes, of all directories (to which you have access) at or below the current point in the file system, you use:

chmod allows you to specify permissions for a file using octal numbers. 1000 permission is:

You instruct a program to take its input from a previously prepared text file using the input redirection character:

When searching the path, if there are two commands with the same name:

Which character would be used in the grep filter to specify a pattern which consists of any one of a set of characters?

Which option of the grep filter prints out all those lines that do not match the pattern specified by the regular expression ?

Which character of the grep filter specifies that the pattern preceding it must occur at the end of each line ?

Which screen manipulation command sets the screen back to normal?

You want to specifically search for the character [ . What character(s) would you use in the expression to achieve this ?