mahmood - 3 months ago 12

Linux Question

I have a file like this(which is space delimited):

`AX-18 Chr1_419085 1 41908545 T C -1 98 0.51`

AX-19 Chr1_419087 1 41908740 T C 0 15 0.067

AX-20 Chr1_419087 1 41908741 T C 0 13 0.067

and I want to use

`sort`

`sort -n -k 4,1 out1.txt`

sort -n -k 4 out1.txt

sort -n -k4 out1.txt

sort -nk4 out1.txt

sort +4 out1.txt

so after running all these commands I get this output( which is identical to my input):

`AX-18 Chr1_419085 1 41908545 T C -1 98 0.51`

AX-19 Chr1_419087 1 41908740 T C 0 15 0.067

AX-20 Chr1_419087 1 41908741 T C 0 13 0.067

I want to get an output like this:

`AX-19 Chr1_419087 1 41908741 T C 0 15 0.067`

AX-20 Chr1_419087 1 41908740 T C 0 13 0.067

AX-18 Chr1_419085 1 41908545 T C -1 98 0.51

Answer

```
sort -nk4 file
-n for numerical sort
-k for providing key
```

or add `-r option`

for reverse sorting

```
sort -nrk4 file
```