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Configure sudo
2012/05/29 |
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Configure sudo to separate users' duty if some people share privileges.
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| [1] | Transfer root privilege to a user all. |
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[root@dlp ~]#
# add at the last line: user 'fedora' can use all root privilege fedora ALL=(ALL) ALL # how to write ⇒ destination host=(owner) command # make sure with user "fedora" [fedora@dlp ~]$ /sbin/shutdown -r now shutdown: Need to be root # denied normally [fedora@dlp ~]$ Password:
The system is going down for reboot NOW! # own password # just executed
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| [2] | In addition to the setting [1], set that some commands are not allowed. |
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[root@dlp ~]#
# near line 49: add aliase for the kind of shutdown commands Cmnd_Alias SHUTDOWN = /sbin/halt, /sbin/shutdown, \ /sbin/poweroff, /sbin/reboot, /sbin/init # add ( commands in aliase 'SHUTDOWN' are not allowed ) fedora ALL=(ALL) ALL, !SHUTDOWN # make sure with user 'fedora' [fedora@dlp ~]$ Password: Sorry, user fedora is not allowed to execute '/sbin/shutdown -r now' as root on dlp.srv.world. # denied normally
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| [3] | Transfer some commands with root privilege to users in a group. |
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[root@dlp ~]#
# near line 51: add aliase for the kind of user management comamnds Cmnd_Alias USERMGR = /usr/sbin/useradd, /usr/sbin/userdel, /usr/sbin/usermod, \ /usr/bin/passwd # add at the last line %usermgr ALL=(ALL) USERMGR groupadd usermgr
[root@dlp ~]#
vi /etc/group # add a user in this group usermgr:x:502: fedora # make sure with user 'fedora' [fedora@dlp ~]$ [fedora@dlp ~]$ # done normally [fedora@dlp ~]$ Changing password for user testuser. New UNIX password: # set testuser's password Retype new UNIX password: passwd: all authentication tokens updated successfully. |
| [4] | Transfer a command with root privilege to a user. |
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[root@dlp ~]#
# add at the last line
fedora ALL=(ALL) /usr/sbin/visudo cent ALL=(ALL) /usr/sbin/useradd, /usr/sbin/userdel, /usr/sbin/usermod, /usr/bin/passwd ubuntu ALL=(ALL) /bin/vi # make sure with user 'fedora' # possible to open and edit ## Sudoers allows particular users to run various commands as ## the root user, without needing the root password. ## # make sure with user 'cent' [cent@dlp ~]$
[cent@dlp ~]$
# done normally # make sure with user 'ubuntu' # possible to open and edit # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that |
| [5] | The logs for sudo are kept in '/var/log/secure', but there are many kind of logs in it. So if you'd like to keep only sudo's log in a file, Set like follows. |
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[root@dlp ~]#
# add at the last line Defaults syslog=local1
[root@dlp ~]#
vi /etc/rsyslog.conf
# The authpriv file has restricted access.
[root@dlp ~]# local1.* /var/log/sudo.log # line 45: add authpriv.* /var/log/secure systemctl restart rsyslog.service |