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You can read, add, delete and modify Windows permissions from Linux using smbcacls from the smb-client package.
Replace sed regular expressions with perl patterns on the command line.
The sed equivalent is: echo "sed -e"|sed -e 's/sed -e/perl -pe/'
While at the command line of of hosta, scp a file from remote hostb to remote hostc. This saves the step of logging into hostb and then issuing the scp command to hostc.
Find all files that contain string XXX in them, change the string from XXX to YYY, make a backup copy of the file and save a list of files changed in /tmp/fileschanged.