Sorting file except 1st line

[fabien]

Hi!

Is there a way to use sort -u to sort a file and remove all duplicate lines but the sorting should only apply after the first line (i.e, the first line will always remain the first line whatever sorting is done below).

Thanks,

 

[aigles]

Try this :

head -1 input_file > output_file
tail +2 input_file | sort -u >> output_file


Jean Pierre.

 

[bigoldbulldog]

ex -s <file_to_modify> <<EOF
2,\$!sort -r
w
q
EOF

# or as

ex -s <file_to_modify> <<EOF^J2,\$!sort -u^Jw^Jq^JEOF

# or as

echo &quot;2,\$!sort -r^Jw^Jq&quot; | ex -s <file_to_modify>

Cheers,
ND

bigoldbulldog@hotmail.com

 

[cardy]

A variation on aigles solution (without the output_file):

head -1 input_file; tail +2 input_file | sort -u

or put this in a script (called, say, nsort)

head -1 $1; tail +2 $1 | sort -u

then run

nsort input_file

 

[Ygor]

Or ..
[tt]
( head -1 file1
tail +2 file1 | sort -u ) > file2[/tt]

 

[stefanwagner]

Don't forget to unique the lines!

head -1 input_file > output_file
tail +2 input_file | sort -u | uniq >> output_file

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung

 

[PHV]

stefanwagner, uniq is not needed when the -u option of sort is used.

Hope This Help, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244

 

[stefanwagner]

oh - I didn't know (and was too lazy to look what -u is used for)

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung