Convert all text in a file from upper-case to lower-case Advanced Linux Add comments Jan 272012 Convert all text in a file from upper-case to lower-case Answer: Just one command needed: # tr '[:upper:]' '[:lower:]' < input.txt Related posts: Case conversion of string in Linux Convert Windows text file to UNIX format without dos2unix Convert DOS/MAC to UNIX text file format converter Convert a Nero .nrg file to .iso file Is PHP’s function name case-sensitive or case-insensitive? Leave a Reply Cancel reply Name (required) E-mail (required) URI Your Comment You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>