How to rename all the files in the directory in such a way the files get added "_1" before ".txt"  apac_02_aug_2017_file.txt emea_02_May_2017_file.txt ger__02_Jun_2017_file.txt   To  apac_02_aug_2017_file_1.txt emea_02_May_2017_file_1.txt ger__02_Jun_2017_file_1.txt
I would like to change a file extension from *.txt to *.text. I tried using the basename command, but I'm having trouble on changing more than one file.  Here's my code:  files=`ls -1 *.txt`  for x in $files do     mv $x "`basename $files .txt`.text" done   I'm getting this error:  basename: too many arguments Try basename --help' for more information
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