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Linux - Sudo

sudo allows a permitted user to execute a command as root (or another user), as specified by the security policy:

  • It reads and parses /etc/sudoers, looks up the invoking user and its permissions,
  • then prompts the invoking user for a password (normally the user’s password, but it can as well be the target user’s password. Or it can be skipped with NOPASSWD tag),
  • after that, sudo creates a child process in which it calls setuid() to switch to the target user,
  • next, it executes a shell or the command given as arguments in the child process above.


linux/sudo.txt · Last modified: 2023/07/17 20:53 by peter

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