Forge server 1.17.1 on Linux won't run - No main manifest attribute [closed]

I'm trying to get a Minecraft forge server up and running. I have Java 16:

[opc@better-minecraft1 ~]$ java --version
java 16.0.2 2021-07-20
Java(TM) SE Runtime Environment (build 16.0.2+7-67)
Java HotSpot(TM) 64-Bit Server VM (build 16.0.2+7-67, mixed mode)

Vanilla Minecraft server 1.17.1 is installed (also in /home/opc/) and working fine.

I downloaded the Forge installer from https://files.minecraftforge.net/net/minecraftforge/forge/index_1.17.1.html. Then I ran the installer with java -jar forge-1.17.1-37.1.0-installer.jar --installServer (still in the same directory). This seemed to work - the last line of the output was The server installed successfully.

Now I have two problems. First, I was expecting the Forge jar to appear in the directory but it didn't. I eventually found it in /home/opc/libraries/net/minecraftforge/forge/1.17.1-37.1.0/forge-1.17.1-37.1.0-universal.jar.

Second, trying to run it from there doesn't work:

[opc@better-minecraft1 ~]$ java -Xmx5120M -Xms2048M -jar ~/libraries/net/minecraftforge/forge/1.17.1-37.1.0/forge-1.17.1-37.1.0-universal.jar nogui
no main manifest attribute, in /home/opc/libraries/net/minecraftforge/forge/1.17.1-37.1.0/forge-1.17.1-37.1.0-universal.jar

Any ideas? This is a headless linux server, so no gui tools.

The directory where all this was done now looks like this:

-rw-rw-r--.  1 opc opc        2 Dec  2 11:48 banned-ips.json
-rw-rw-r--.  1 opc opc        2 Dec  2 11:48 banned-players.json
-rw-rw-r--.  1 opc opc      180 Dec  2 11:38 eula.txt
-rw-rw-r--.  1 opc opc  2067991 Dec  2 11:42 forge-1.17.1-37.1.0-installer.jar.log
drwxrwxr-x. 12 opc opc     4096 Dec  2 11:41 libraries
drwxrwxr-x.  2 opc opc       78 Dec  2 11:48 logs
-rw-rw-r--.  1 opc opc        2 Dec  2 11:48 ops.json
-rw-rw-r--.  1 opc opc      362 Dec  2 11:41 run.bat
-rwxrw-r--.  1 opc opc      365 Dec  2 11:41 run.sh
-rw-rw-r--.  1 opc opc 43621201 Jun  8 11:03 server.jar
-rw-rw-r--.  1 opc opc     1037 Dec  2 11:48 server.properties
-rw-rw-r--.  1 opc opc        2 Dec  2 11:48 usercache.json
-rw-rw-r--.  1 opc opc      339 Dec  2 11:41 user_jvm_args.txt
-rw-rw-r--.  1 opc opc        2 Dec  2 11:38 whitelist.json
drwxrwxr-x. 10 opc opc     4096 Dec  2 14:03 world