Practicing Unix/ Linux: Command Lines Exercises

btd
35 min readJan 30, 2024
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…

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