Curl command what do I make wrong?

Question

I get:

root@dm820:~# ExecStart=/usr/bin/curl'https://dynupdate.no-ip.com/nic/update' --header "Authorization: Basic <$xxxx:$xxx>" -d 'hostname=<hostname>.xxxx.ddns.net'
-sh: --header: command not found

Answer 1

what do I make wrong?

ExecStart=/usr/bin/curl'https://dynupdate.no-ip.com/nic/update' --header "Authorization: Basic <$xxxx:$xxx>" -d 'hostname=<hostname>.xxxx.ddns.net'

1. You're defining ExecStart variable and trying to run --header. The syntax is like

   foo=bar some_command option1 option2
   

2. You're using the full path /usr/bin/curl. Unless you know it's right and you need the full path, you should rely on your $PATH and use just curl.

3. You have no space after curl.

4. You're trying to run curl as root.

5. You're running a command (like random code from the Internet?) you apparently don't understand as root.

To fix:

• Write 100 times "I won't run commands I don't understand as root". :)
• Drop ExecStart=, it's a part of systemd syntax.
• Use just curl.
• Put a space after curl.

It will be like

curl 'https://dynupdate.no-ip.com/nic/update' --header "Authorization: Basic <$xxxx:$xxx>" -d 'hostname=<hostname>.xxxx.ddns.net'

where <$xxxx:$xxx> and <hostname> are still placeholders you need to change to something valid.

Answer 2

If you want to run this from the command line and not from systemd, you have to run it like this:

curl 'https://dynupdate.no-ip.com/nic/update' --header "Authorization: Basic <$xxxx:$xxx>" -d 'hostname=<hostname>.xxxx.ddns.net'