Today, in order to strengthen the authority of the machine control, operation and maintenance so that the brothers root privileges to recover all the training machines, just gave dev authority, when I boarded dev found no written permission, operation and maintenance to quickly find a temporary root privileges to each user to configure an account, assign a directory can be written, and to run third-party command some of empowerment, then a problem, too big steps lead to major problems in the assigned rights when accidentally / bin / su privileges to change, and all ordinary users su not move, Google it,
Problem Description: You can not use su among ordinary users -
the cause: the case of groups and permissions as / bin / su is modified human
solution: chown root.root / bin / su && chmod 4755 / bin / su && ls -lda / bin / su
result is normal ls as shown below:
