Zipping a file in bash fails

Question

I have this line of code in a file called backup sh  located in  backup  so the path is  backup backup sh   The code is      bin bash zip -r  backup Backup-  date   Y- m- d   ftb   The file has permissions 777  However  it errors with      -bash   backup backup sh   bin bash M  bad interpreter  No such file or directory    backup and  ftb both exist  I m running this as a root user

User · Accepted Answer

Run dos2unix or similar utility on it to remove the carriage returns (^M).

This message indicates that your file has dos-style lineendings:

-bash: /backup/backup.sh: /bin/bash^M: bad interpreter: No such file or directory

Utilities like dos2unix will fix it:

 dos2unix <backup.bash >improved-backup.sh

Or, if no such utility is installed, you can accomplish the same thing with translate:

tr -d "\015\032" <backup.bash >improved-backup.sh

As for how those characters got there in the first place, @MadPhysicist had some good comments.

[bash] Zipping a file in bash fails

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