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Try this

$ print "ra\n" > na
$ print "ras" >> na

Try this, but be careful about accidentally deleting file. :)

grep -l 'blah' * | xargs /bin/rm -f

Try the option -r, for example:

mailx -c $CC -r $FROM -s $SUBJECT

I'm using this for automatic script that will send mail for requesting to run job. The requestor will be changed according to...