If installed mysql may fail to upgrade during a d-u:
Code:
Setting up mysql-server-5.5 (5.5.23+dfsg-2) ...
/lib/lsb/init-functions: line 428: FANCYTTY: unbound variable
invoke-rc.d: initscript mysql, action "stop" failed.
So far for me, stopping mysql manually fails:
Code:
/etc/init.d/mysql stop
/lib/lsb/init-functions: line 428: FANCYTTY: unbound variable
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