Practicing Unix/ Linux: Command Lines Exercises

Outline:

I. Command 
II. egrep/ grep
III. Regular Expression/ Shell Globbing
IV. Syntax

Identify cmd name options, arguments if any, in the following cmd lines.

$ ls -l / /usr .

• Command: ls
• Options: -l
• Arguments: /, /usr, .
• Explanation: This ls command is used to list the contents of directories.
• ls: This command is used to list directory contents.
• -l: This option specifies a long listing format, providing detailed information about each file or directory.
• /: This is the root directory of the filesystem. When used as an argument to ls, it lists the contents of the root directory.
• /usr: This is a directory typically containing user binaries, libraries, and other shared resources.
• .: This represents the current directory. When used as an argument to ls, it lists the contents of the current directory.

$ cat /etc/passwd ../../project

• Command: cat
• Arguments: /etc/passwd, ../../project
• Explanation: This cat command is used to concatenate and display the contents of…