remove unkown device from VG

add a new disk and assign the missing uuid to it

pvcreate --uuid 56ogEk-OzLS-cKBc-z9vJ-kP65-DUBI-hwZPSu /dev/sdc1

then remove it from the VG and PVs

bash read file line by line

cat myfile.lst | while read field1 field2;do echo $field1 $field2;done

comm - join like utility on linux

Compare sorted files FILE1 and FILE2 line by line.

       With  no  options,  produce  three-column  output.  Column one contains lines unique to FILE1, column two contains lines unique to FILE2, and column
       three contains lines common to both files.

ssh disable host authenticity checking

ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -l user 10.10.1.70

thanks to http://linuxcommando.blogspot.com/2008/10/how-to-disable-ssh-host-key-checking.html