Issue with awk, bad interpretor

Asked Jun 21 '18 at 17:22

Active Jun 21 '18 at 17:22

Viewed 49 times

I have a neuroimaging script that uses a command called mat2det. Example shown bellow:

    eTIV=`./mat2det data_path/subject_T_brain.mat | awk '{ print $2 }'`

This mat2det command is coded like this:

    #!/bin/awk -f



    BEGIN { i=0; } {
    if (i==0) {a=$1;b=$2;c=$3; i=i+1;} else

    if (i==1) {d=$1;e=$2;f=$3; i=i+1;} else

    if (i==2) {g=$1;h=$2;I=$3; i=i+1;} }

    END {

    det=a*e*I+b*f*g+c*d*h-a*f*h-b*d*I-c*e*g;

    printf("%f\t%f\n",det,1/det);}

Whenever I try to run ./mat2det, it fails, giving me the error message:

    bash: ./mat2det: /bin/awk: bad interpreter: No such file or directory

The file has full permissions, via chmod 755 and I'm unsure why this is the case. Does anyone know why this might be the case?

Apologies for my ignorance around the topic and if I haven't explained this issue well.

Thanks!

asked Jun 21 '18 at 17:22

user9974454

Is `awk` located at `/bin/awk` on your system? – JNevill Jun 21 '18 at 17:27
Try running `which awk` to find where it lives. – Mark Setchell Jun 21 '18 at 17:29
You may find it `/usr/bin/awk` which is where it is dropped on Ubuntu. In which case your script should start with `#!/usr/bin/awk -f` instead – JNevill Jun 21 '18 at 17:30
adding #!/usr/bin/awk -f worked! Thank you so much for your help! – user9974454 Jun 22 '18 at 10:23

Issue with awk, bad interpretor

0 Answers0