Use the sort command in Unix
The sort
command sorts the contents of a file, in numeric
or alphabetic order, and prints the results to standard output
(usually the terminal screen). The original file is unaffected.
For example, if filename
is a file containing a list of
words, at the Unix prompt, you would enter:
sort filename
This will print the list to the screen in alphabetical order (numbers first, then capital words, then lowercase words). To eliminate any duplicate entries in the list, use:
sort -u filename
To sort case-insensitively, use:
sort -f filename
To sort case-insensitively and in reverse order, use:
sort -fr filename
As with many Unix commands, you can redirect the output to a new file:
sort filename > newfilename
The output of the sort
command will then be stored in a
file named newfilename
in the current directory.
You can also pipe the output of the sort
command into
other Unix commands, for example:
sort filename | more
This sends the output through the more
command for easy
reading.
To print only the first word of each line, enter:
sort filename | cut -f1 -d" "
The cut
command selects the field specified by the
-f
option and distinguishes fields by the
delimiter character specified by the -d
option, a space in this example.
To view the online manual for the sort
command, at the
Unix prompt, enter:
man sort
At Indiana University, for personal or departmental Linux or Unix systems support, see Get help for Linux or Unix at IU.
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This is document afjb in the Knowledge Base.
Last modified on 2023-06-27 10:13:03.