Output Strings in Lowercase -- UNIX

Bash · Linux · Unix

Bash · Linux · Solaris

This is something I found on someone else’s blog which i find useful, its always the simple things you forget.

# cat uppercasefile | tr "[:upper:]" "[:lower:]"

this file’s contents are in uppercase but its output should be lowercased

# tr "[:upper:]" "[:lower:]" < uppercasefile

this file’s contents are in uppercase

but its output should be

lowercased

# cat uppercase | tr '[A-Z]' '[a-z]'

this file’s contents are in uppercase

but its output should be

lowercased

# tr '[A-Z]' '[a-z]' < uppercasefile

this file’s contents are in uppercase

but its output should be

lowercased

Output lowercase strings to file

# tr '[A-Z]' '[a-z]'  outputfile_lower

# date | tr "[:upper:]" "[:lower:]"

sat sep  8 23:24:20 kst 2007