Linux Fundamentals Part

SSH

Secure shell - all traffic is encrypted with cryptography - Allows to remotely manage a given device - Sends encrypted data over network

ssh <host>@MACHINE_IP

Example:

ssh tryhackme@10.10.224.148

Flags and Switches

Flags/switches - arguments provided after most linux commands

Example:

Man Page

Source of information and documentation for linux commands or applications

man ls

Copying and Moving Files

To copy a file, use cp and then the 1) name of existing file, and the 2) name of the new file

cp note note2

To move a file, use mv and the same format

mv note2 note3

To determine what the file type is, use file.

tryhackme@linux2:~$ file note
note: ASCII text

Permissions

Switching between users:

su <user>

Common Directories

/etc Short for 'etcetera'. Stores system files used by OS.

/var Variable data. Stores data frequently accessed or written by services or applications running on the system.

/root Home directory for 'root' system user.

/tmp Volatile, stores temporary data. Data is cleared/wiped on system restart.