so here's the script that i am trying to get it work:

fileName="$( basename "$filePath" )"
dateTime=$( date "+%d.%m.%Y_%H:%M:%S" ) 

# Check if backup folder exists if not create them
if [ ! -d "$backupDir" ]; then
  mkdir "$backupDir"

# Create the Backup in a zip-file
zip -r "${backupDir}${fileName}-${dateTime}.zip" "$filePath" 

This error appears:

zip I/O error: Protocol error
zip error: Could not create output file (/my/backup/dir/filename-backups/

The problem seems to be the "dateTime" variable. Without this variable the script runs faultless.

EDIT: Ok the problem are the double points in the date string:

dateTime=$( date "+%d.%m.%Y_%H:%M:%S" )  

If i change it to

dateTime=$( date "+%d.%m.%Y_%H-%M-%S" )  

it works for me. Not really nice, but if there no other possibility...

up vote 1 down vote accepted

It's probably because ZIP is dos/windows-centric. In Windows, : is disallowed in filenames since it's used as separator between drive letter and path (C:\).

Unless you really need zip, I recommend using tar with gzip or xz compression instead.

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