上QQ阅读APP看书，第一时间看更新
Linux commands
In this subsection, let's open the command line and execute some basic commands. In every Linux host, there are command-line interfaces named shells that interpret and execute typed commands and scripts. There are many shell environments, such as Bourne Again Shell (Bash, which is the most common shell), C shell (csh), Korn shell (ksh), and so on. To find the shells available for your environment, just open the command-line interface and type cat /etc/shells:
Now, let's get around some vital basic Linux commands from the shell:
- pwd: To know which directory you are in
- ls: To list files in a directory
- cd: To enter a directory
- mkdir: To create a new directory
- rmdir: To remove a directory
- touch: To create a new file
- cat: To read a file
- cp: To copy a file
- mv: To move a file
- man: To be shown how to use a command
Linux is case-sensitive (to give users many command option possibilities -T, - t, -a, - A, and so on), so you need to check how you are writing every command.
As a penetration tester, there are multiple important commands that you need to know in order to test the security posture of a Linux infrastructure:
- hostname: Information about the host
- cat /proc/version: Kernel information
- uname -r: Kernel release
- uname -a: More detailed information about the system
- cat /proc/cpuinfo: Reads information about the processor
- echo $PATH: Display information about the PATH variable
- history: Display command history