[shell] removing ^M : Dos text to unix

tr -d '\015' < inputfile > outputfile

Detecting ^M (\r\n)

Note that “^M” is “Cntrl+V and Enter” Key

#!/bin/sh
 
if grep "^M" $1 > /dev/null
then
   echo $1 contains DOS Carriage Return
fi

[shell] find command

Check $path folder for the files that are older that 7 days and delete them.

 find $path 2>>$DLOG -mtime +7 ! -exec rm -rf {} \;

check man page