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Very good knowledges of Linux mandrake/Mandriva/CenOS server (in particular with shell command lines)
management of samba server (PDC, file sharing).
management of a telnet or ssh services (allowing to control the remote server)
writing Shell script allowing me to manage 400 peoples approximately and 60 clients (with writing backup routine daily with a week backup, manage the transition of a one year account to another)
manage the quotas group and quotas users (50 MO for each users)
writing NT script (logon.bat)
knowledges of the group policies, machines policies, users policies, etc under Xp pro.
using especially : gpedit.msc
management of a NAS with automatically backup with the crontab.
management àf a second server which the mirror of the first.