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my server ntp point to 2 ntp servers; however, their clock are not sync due to mistake.

I found it is interesting that my server sync both time servers in round-robin, that +47s and -47 per ~10...

my apps use port 40001; however, for example, firstly, I ftp to other server, it made a high port locally, remote is port 21, unfortunately, it hit my port 40001 and my apps is unable to startup....

I enabled accton and lastcomm can show all users command
can restrict specified users, eq. root / user1, users command only?

let me share my idea here
1) ~100 users
2) ~100 linux machines, not NIS or any domain
3) authenticate by window AD
4) the most difficult question - automount home (don't know use NIS or Window)...

can anyone help to share the knowledge on linux os improvement?
1) os account
- use window AD authentication, such as ldap, but how to set /etc/passwd, where to put user home?

2) user account...