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Sort and uniq lines of a file while keeping a header line

 
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# 1  
Old 05-11-2009
Sort and uniq lines of a file while keeping a header line
So, I have a file that has some duplicate lines. The file has a header line that I would like to keep at the top.

I could do this by extracting the header from the file, 'sort -u' the remaining lines, and recombine them. But they are quite big, so if there is a way to do it with a single command, that would be great.

Anyone any ideas? Thanks in advance.

Here's an example file

Code:
MAKEBITS 1.0 574331 /home/woodd/workspace2/ibis_3d/scripts/pdblist2fps.py
a139_371_frag1 1 2 3 4 5 6 10 11
a139_371_frag2 2 4 5 158 159 160 161 162
a139_371_frag3 2 6 159 160 161 258 259 260
a139_371_frag4 1 2 3 4 5 6 10 11
a139_371_frag5 1 2 3 4 5 6 10 11
a139_371_frag6 1 2 3 4 5 6 10 11
a139_IMD_frag1 1 3 4 6 57 58 59 89
a139_371_frag1 1 2 3 4 5 6 10 11
a139_371_frag2 2 4 5 158 159 160 161 162
a139_371_frag3 2 6 159 160 161 258 259 260
a139_371_frag4 1 2 3 4 5 6 10 11
a139_371_frag5 1 2 3 4 5 6 10 11
a139_371_frag6 1 2 3 4 5 6 10 11
a139_IMD_frag1 1 3 4 6 57 58 59 89

# 2  
Old 05-11-2009
Here are some ideas:
https://www.unix.com/unix-dummies-que...struction.html

Check this one out on page 2 from vgersh99:
https://www.unix.com/unix-dummies-que...-top-file.html
 
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