1. creat newfile sudo vim newfile read file sudo vim filename(if this file is not exist,creat a new one) an
1. sudo super user do ROOT is higest user2. man Pages man ping : describe ping command
1. cd etc cd /ect2. ls -l all information (name,permission,ownship) ls -m only name3. sudo find -iname (ignore HighLow capital a
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