The Unix version of the file, after all, has been stripped of its carriage returns so it's four characters smaller. They also show that the size of the file has changed slightly.
The other commands are meant to show that the file's timestamp hasn't changed. In the commands below, the script is being used to convert the DarkBeers.txt file.
#MAC TEXT FILE CR LF CODE#
In the awk command below, we have to look at the return code to determine if awk found a carriage return (\r) in the file.
#MAC TEXT FILE CR LF WINDOWS#
There are also some other ways that you can determine if a file contains Windows style line terminations. rw-r- 1 shs staff 116 Aug 15 17:06 DarkBeers.txt $ dos2unix DarkBeers.txtĭos2unix: converting file DarkBeers.txt to UNIX format. If you don't want the timestamps to change, use the -k or -keepdate options as shown in the second set of commands below. Note that the date/time fields will reflect the date time you made the changes. And they make the changes "in place." In other words, you don't have to generate a second file and then rename it to get back to the original file.
#MAC TEXT FILE CR LF HOW TO#
So how to you go about converting the files from one form of line terminators to the other? Most Unix systems will include two utilities - dos2unix and unix2dos - to convert the files from either format to the other. In the figure below, the carriage return (15 in octal and displayed as \r) and the linefeed or "newline" as it is often called (12 in octal and displayed as \n) are highlighted in red. If you would like to view the carriage return linefeed sequence within your files, you can use the od (octal dump) command to show them to you. DarkBeers.txt: ASCII text, with CRLF line terminators bin/typescript: ASCII text, with CRLF, LF line terminators bin/crlf: ASCII text, with CRLF line terminators Terminators, with escape sequences, with overstriking lab6: ASCII English text, with very long lines, with CRLF, CR, LF line whatever: ASCII text, with CRLF, LF line terminators Then tack on a pipe and look for that CRLF identifier that we saw in the command above. If you want to look through an entire file structure, make use of the find command and use the exec option to run the file command. Whatever: ASCII text, with CRLF, LF line terminators Typescript: ASCII text, with CRLF, LF line terminators Me-dos.txt: ASCII text, with CRLF line terminators With CRLF, CR, LF line terminators, with escape sequences, with overstriking Lab6: ASCII English text, with very long lines, Lab1: ASCII text, with CRLF, LF line terminators If you want to look through a group of files with one handy command, you can just send the output of your file command to grep: $ file * | grep CRLF For files that use only linefeeds, you would instead see something like this: $ file junk2 The file command clearly identifies files that use the Windows convention. DarkBeers.txt: ASCII text, with CRLF line terminators
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