Associated stations - making hostnames visible across multiple APs

[66enligne]

looks exactly like yours except /5 instead of /1

root@XXX:~# crontab -l
*/5 * * * * scp /tmp/dhcp.leases root@IP_AP1:/tmp/dhcp.leases
*/5 * * * * scp /tmp/dhcp.leases root@IP_AP2:/tmp/dhcp.leases

and as said previously everything works (copy is updated every 5mn) but with a logged cron.err message

[mpa]

@66enligne

But one concern with my system log reporting such message looking like cron error message

Tue Nov 22 00:42:00 2022 cron.err crond[6299]:  line scp /tmp/dhcp.leases root@AP_IP:/tmp/dhcp.leases

If you want to suppress these messages:

uci set system.@system[0].cronloglevel='9'
uci commit system
/etc/init.d/cron restart

@66enligne

true error or standard cron report?

I cannot tell this from the crond log message alone, but since it works fine, I would guess there was no error.

[66enligne]

OK THX I'll stay like it is by default to level 5
as moving to cronloglevel=9 well modifies the reporting level with no report of the cron start nor of the scp copies every 5 mn. But it also donnot report of true errors (I introduced a wrong line in the crontab for testing and it was not detected)

This post gives an explanation at the end

Cron.err - why?

I have the following crontab. It executes the jobs in it, but it is filling the system log with cron.err messages. crontab, edited with crontab -e # Once a year, refresh the SSL certificates 0 0 1 */12 * /usr/bin/refresh_ssl_certificates.sh # This script works fine if I just execute it from the terminal */1 * * * * /usr/bin/test.sh # Debug with the simplest possible command */1 * * * * echo "hello" And yet, in logread it is full of these errors. What is it trying to tell me? Tue Jul 7 1…

BR

[eR2022]

Wow, working great!
Should add the same command on startup also?
Maybe cron job is executing the code also on startup?

[e97]

Thanks @pkmann !! Learned something new and improved user experience on access points

@66enligne same cron reports err even if command executed successfully. looks like its done to save memory Cron.err - why? - #5 by biangbiangmian

[account4538]

This may help as well:

Real-Time Updating Dumb AP Associated Stations!

This method will update your Dumb AP devices hostnames in Real-Time! No cronjob or whatsoever. Run this SSH commands on your Main router: mkdir /root/.ssh dropbearkey -t rsa -f ~/.ssh/id_dropbear Copy the full key (without Fingerprint) to the Dumb AP System > Administration > SSH-Keys Run this command once on Main router to add it as trusted host (PuTTy) : scp /tmp/dhcp.leases root@<dumb-ap-ip>:/tmp/dhcp.leases Create script in /etc/hotplug.d/dhcp and chmod +x the file : #!/bin/s…

[ThiloteE]

Any chance this can be made into a package or added to Luci by default for all those folks to like to manage their devices from within Luci?

[Chatmandu]

@BlueWings

mkdir ~/.ssh/

I'm having trouble making the directory.

It won't create the folder because a file exists, but no file exists?

root@rp4-openwrt:/# mkdir ~/.ssh/
mkdir: can't create directory '/root/.ssh/': File exists
root@rp4-openwrt:/# ls
bin         dev         lib         lost+found  overlay     rom         sbin        tmp         var
boot        etc         lib64       mnt         proc        root        sys         usr         www
root@rp4-openwrt:/# mkdir ~/.ssh/
mkdir: can't create directory '/root/.ssh/': File exists
root@rp4-openwrt:/# cd /.ssh/
-ash: cd: can't cd to /.ssh/: No such file or directory

Edit

It has created a new folder /root/.ssh is that the correct folder structure or should it be /.ssh/ ?

Edit 2

I've got it working. Thanks for adding those tips.

[4zims]

@pkmann

2. Add the generated public key to the accepted keys on the secondary access point(s) (System > Administration > SSH-Keys)
   (note if you need to get the public key again, you can dump it with dropbearkey -y -f ~/.ssh/id_dropbear on the primary device)

How to do this from command line?

[lleachii]

@4zims

How to do this from command line

Your answer is contained within the quote. What issue are you experiencing?

[4zims]

My question is how to add a public key from the command line instead of Luci Web UI.

[RuralRoots]

Post # one.

@pkmann

dropbearkey -t rsa -f ~/.ssh/id_dropbear

[4zims]

@pkmann

dropbearkey -t rsa -f ~/.ssh/id_dropbear

I thought this was about generating SSH keys, not adding a public key on the secondary device.

[RuralRoots]

And?

dropbearkey

Usage: dropbearkey -t <type> -f <filename> [-s bits]
-t type	Type of key to generate. One of:
		rsa
		ed25519
-f filename    Use filename for the secret key.
               ~/.ssh/id_dropbear is recommended for client keys.
-s bits	Key size in bits, should be a multiple of 8 (optional)
           Ed25519 has a fixed size of 256 bits
-y		Just print the publickey and fingerprint for the
		private key in <filename>.

[4zims]

I want to do this:

using command-line

[RuralRoots]

dropbearkey ssh-keygen -t rsa -f ~/.ssh/id_dropbear`

[4zims]

root@OpenWrt:~# ssh-keygen -t rsa -f ~/.ssh/id_dropbear
-ash: ssh-keygen: not found

I think you don't understand my question.

I want to paste SSH key using command line and not in Luci.

[RuralRoots]

@4zims

-ash: ssh-keygen: not found

Yep. You need to add it. Or just use the dropbearkey stanza if you want to replicate the OP’s method. Generating public and private keys

[4zims]

can you show me?

[RuralRoots]

From your animation, yes you should be able to use a dropbearkey to copy the public key to LuCI/Administration/SSH-Keys. I believe it is OpenSSH compatible, but if you want to replicate the OP’s post, the dropbearkey` is required because Dropbear needs the keys in a different format to OpenSSH. Reread the wiki link.