单项选择题
What is the proper way to ensure that updates to the /etc/aliases file are seen by sendmail？（）
A.Refresh the named daemon B.Run the alias command C.Refresh the snmpd daemon D.Run the sendmail -bi command
单项选择题 Whatistheproperwaytorefreshsendmail？（）
单项选择题 AclientcannotmountafilesystemfromanNFSserver.Whichofthefollowingoptionsisthemostprobablecauseforthemountfailure？（）
单项选择题 Onasystemwidebasis，whichofthefollowingproceduresisbesttomakeNISnameresolutiontakeprecedenceoverDNS？（）
