kali file perms and stuff

perm types:

• r- read perm
• w - write perm
• x - execute perm

giving ownership to a specific user:

• sudo chown username path/file

giving perms to a group:

• sudo chgrp groupname file/program

checking perms:

• ls -la
• explanation:
• 
  1. file type
     • d = directory
     • • = file
  2. perms on the file for the owner, group and other users in order
     • example:
     • 
       • owner has read write and execution perms
       • group has read and execute perms
       • other users have the same perms as the group
  3. file owner
  4. file group
  5. file size in bytes
  6. date and time of last modification or creation
  7. file name

changing file perms:

• only the root user and owner can change file perms
• two ways to change perms
  1. Binary-Octal Method
  2. Symbolic method

Binary-Octal Method:

• easier way to remember (use the 1, 2 4 rule):
  • 
• if we wanna give a file with rw-r--r-- perms rwxrwxr-x perms:
  • sudo chmod 775 filename

Symbolic Method:

• syntax after chmod :
  • u - user
  • g - group
  • o - others
  • • removes a perm
  • • adds a perm
  • = sets a perm
• example:
  • sudo chmod u-w filename (removes write perms from user)
  • sudo chmod u-w,g+x filename (removes write perms from user and adds execute perms to the group)
• owner: rwx
• group: r-x 55
• other: r—