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To allow serveradmin to login, change the default shell from nologin to /bin/sh by editing the passwd file. The chsh command is not currently available on the package site so you must edit edit the passwd file manually,
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cd ~
cp /etc/passwd ./passwd.2012.08.12.v0.0.tpham.bck # Make a backup first.
sudo vi /etc/passwd # Edit the file with vi or whatever is your favourite editor. |
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http://forum.synology.com/enu/viewtopic.php?f=14&t=44749&start=30
The advantage over the traditional cron tabe approach is less inconsistency in logs for when there are large time corrections. The cost is a little processing power and memory, but for a modern server this is negligible.