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How to remove newline character in bash script?

I have a little problem with a small script. There are many entries in the text file, for example:

permission-project1-admin
permission-project2-admin
....

The script looks like this (really, it's terrible, but still helps me):

#!/bin/bash
for i in $(cat adminpermission.txt); do
    permission=$(echo $i | cut -f1)

printf "dn:$permission,ou=groups,dc=domain,dc=com \n"
printf "objectclass: groupOfUniqueNames \n"
printf "objectclass: top \n"
printf "description: \n"
printf "cn:$permission \n\n"
done

The result looks great, but since there is a newline at the end of the text file, the first printf line is split across two lines:

dn:permission-project1-admin
,ou=groups,dc=domain,dc=com
objectclass: groupOfUniqueNames
objectclass: top
description:
cn:permission-project1-admin

My question is, how can I eliminate the newline character between the first two lines?

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3 answers


Get it right first.

while read permission rest
do
  ...
done < adminpermission.txt


In addition, heredocs.

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Try:



$(echo $i | tr -d "\n" | cut -f1)
+2


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Have you checked if your code will return adminpermission.txt

to DOS? Your code will cut lines, but depending on how you view the output, carriage returns might break the lines you describe.

You may try

mv adminpermission.txt backup.txt
tr -d '\r' < backup.txt > adminpermission.txt

to convert to UNIX EOL and then run your script again.

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