mstyne's sysadmin pro-tip series

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mstyne’s sysadmin pro-tip series, #X:

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#1 disk space is finite
#2 hire one
#3 DNS: You is kind. You is smart. You is important.
#4 expired says "we don't care". self signed says "we're cheap"
#5 update your systems after you deploy them and then keep them updated
#6 keep your domains renewed
#7 make sure the host you're migrating to has enough disk space
#8 there's a special place in hell for people who run ssh on a non-standard port
#9 don't let them talk you out of having failover connectivity
#10 don't blacklist google
#11 if you need to ask someone's permission before you decommission a server, get their permission