Monthly Archives: April 2010

Lock and Unlock Linux accounts

Using passwd it is possible to quickly lock and unlock Linux accounts. To lock an account. passwd -l username To unlock an account. passwd -u username

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Using telnet to test POP server

Using telnet (or putty) it’s possible to some simple tests against a POP server. By no means exhaustive, it can give you insights in where to start troubleshooting. First, using telnet and open a connection the remote POP server telnet mailserver 110 Where mailserver is the mail server you want to connect to. Note that [...]

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Linux IPv6 Neighbor Discovery

Using ping6 and ip neigh it’s possible to discover other IPv6 hosts on your local network using the link-local addresses. First, use ping6 to ping all hosts on the local network using the IPv6 link-local address ping6 -c 2 -I eth0 ff02::1 Then, use ip neigh to show a list of IPv6 enable hosts on [...]

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