bash script lowercase every string in the input file and output result to new file

Question

how to lowercase everything in a text file and then output the result to a new file in bash script? for example the input file contains

a
bC
D
E

output

a
bc
d
e

See also: stackoverflow.com/questions/2264428/… – Ja͢ck May 12 '12 at 7:28 — Ja͢ck, May 12 '12 at 7:28

Prince John Wesley · Accepted Answer · 2012-05-12 12:44:39Z

up vote 4 down vote accepted

Use tr command:

tr '[:upper:]' '[:lower:]' < infile > outfile

answered May 12 '12 at 5:31

Prince John Wesley
28.2k74459

3

Better: '[:upper:]' '[:lower:]' – Dennis Williamson May 12 '12 at 10:54

@DennisWilliamson: yes. i'll update it – Prince John Wesley May 12 '12 at 12:44

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