i followed the oracle guidelines to start vnc server at boot using
svccfg -s application/x11/x11-server add display1
svccfg -s application/x11/x11-server:display1 addpg options application
svccfg -s application/x11/x11-server:display1 addpropvalue options/server astring: "/usr/X11/bin/Xvnc"
svccfg -s application/x11/x11-server:display1 addpropvalue options/server_args astring: '"SecurityTypes=None"'
mkdir -p /etc/dt/config
cp /usr/dt/config/Xservers /etc/dt/config/Xservers
echo " :1 Local local_uid#none root /usr/X11/bin/Xserver :1" >> /etc/dt/config/Xservers
pkill -HUP dtlogin
and that works just fine. My problem is that i need a very specific Xvnc with parameters "-cc3 -depth 8". So i added them with
svccfg -s application/x11/x11-server:display1 addpropvalue options/server_args astring: '"-cc 3"'
svccfg -s application/x11/x11-server:display1 addpropvalue options/server_args astring: '"-depth 8"'
listprop in svccfg looks okay but the server does not start after pkill -HUP dtlogin and also not after a reboot. Also tried to put all params into a single string.
setpprop options/server_args "SecurityTypes=None -cc 3 -depth 8"
Before adding cc and depth, when the vnc was running, ps -ef | grep vnc revealed, that -depth 24 was automatically added to the command line. So i also tried only the cc option - no success. I also can not see which logs might contain relevant information.
Has anyone successfully startet an VNC with pseudocolors at boot time?
(The inetd way works with pseudocolors, but in the end i need 2 fixed vnc servers running on display :1(pseudocolor) and :2(FullColor)
Related
What is the significance of -- in the command line of commands like lxc-create or lxc-start.
I tried to use Google in order to get an answer but without success.
// Example 1
lxc-create -t download -n u1 -- -d ubuntu -r DISTRO-SHORT-CODENAME -a amd64
// Example 1
application="/root/app.out"
start="/root/lxc-app/lxc-start"
$start -n LXC_app -d -f /etc/lxc/lxc-app/lxc-app.conf -- $application &
As explained in the references provided in the comments, the "--" indicates the end of the options passed to the command. The following parameters/options will be eventually used by a sub-command called by the command.
In your example:
lxc-create -t download -n u1 -- -d ubuntu -r DISTRO-SHORT-CODENAME -a amd64
lxc-create command will interpret "-t download -n u1" and the remaining "-d ubuntu -r DISTRO-SHORT-CODENAME -a amd64" will be passed to the template script which will configure/populate the container.
In this specific example, the "-t download" makes lxc-create run a template script named something like "/usr/share/lxc/templates/lxc-download" to which it will pass "-d ubuntu -r DISTRO-SHORT-CODENAME -a amd64".
I have the need to start a java rest server with concourse that lives on an Ubuntu 18.04 machine. The version of concourse my company uses is 5.5.11. The server code is written in Java, so a simple java -jar <uber.jar> suffices from the command line (see below). In production, I will not have this simple luxury, hence my question.
I have an scp command working that copies the .jar from concourse to the target Ubuntu machine:
scp -i /tmp/key.p8 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ./${NEW_DIR}/${ARTIFACT_NAME}.${ARTIFACT_FILE_TYPE} ${SRV_ACCOUNT_USER}#${JAVA_VM_HOST}:/var/www
Note that my private key is passed with -i and I can confirm that is working.
I followed this other SO Q&A that seemed to be promising: Getting ssh to execute a command in the background on target machine
, but after trying a few permutations of the suggested solution and other answers, I still don't have my rest service kicked off.
I've tried a few permutations of this line in my concourse script:
ssh -f -i /tmp/pvt_key1.p8 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${SRV_ACCOUNT_USER}#${JAVA_VM_HOST} "bash -c 'nohup java -jar /var/www/${ARTIFACT_NAME}.${ARTIFACT_FILE_TYPE} -c \"/opt/testcerts/clientkeystore\" -w \"password\" > /dev/null 2>&1 &'"
I've tried with and without the -f and -t switches in ssh, with and without the file stream redirection, with and without nohup and the Linux background ('&') command and various ways to escape the quotes.
At the bash prompt, this line successfully starts my server. The two switches are needed to point to the certificate and provide the password:
java -jar rest-service.jar -c "/opt/certificates/clientkeystore" -w "password"
I really think this is possible to do in Concourse, but I'm stuck at this point.
After a lot of trial an error, it seems I needed to do this:
ssh -f -i /tmp/pvt_key1.p8 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null ${SRV_ACCOUNT_USER}#${JAVA_VM_HOST} "bash -c 'sudo java -jar /var/www/${ARTIFACT_NAME}.${ARTIFACT_FILE_TYPE} -c \"/path/to/my/certificate\" -w \"password\" > /var/www/log.txt 2>&1 &'"
The key was I was missing the 'sudo' portion of the command. Using nohup as opposed to putting in a Linux bash background indicator ('&') seems to give me an error in the pipeline. This works for me, but others are welcome to post responses with better answers or methods that might be a better practice.
I would like to connect to a VPN on start-up of OSMC.
Environment:
installed OSMC on Raspberry 2
downloaded, compiled and installed shrew soft vpn on the device
As user 'osmc' with ssh
> sudo iked starts the daemon successfully
> ikec -r "test.vpn" -a starts the client, loads the config and connects successfully
rc.local:
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
sudo iked >> /home/osmc/iked.log 2>> /home/osmc/iked.error.log &
ikec -a -r "test.vpn" >> /home/osmc/ikec.log 2>> /home/osmc/ikec.error.log &
exit 0
after start of raspberry iked is as process visible with ps -e
but ikec is not running
osmc#osmc:~$ /etc/rc.local starts the script and connects to vpn successfully
Problem:
Why does the script not working correctly on start-up?
Thank you for your help!
I was also looking to do the same thing as you and ran into the same problem. I'm no linux expert, but I did figure out a workaround.
I created a script called ikec_after_reboot.sh and it looks like this...
$ cat ikec_after_reboot.sh
#!/bin/bash
echo "Starting ikec"
ikec -r test.vpn -a
I then installed cron.
sudo apt-get update
sudo apt-get install cron
Edit the cron job as root and run the ikec script 60 seconds after reboot.
sudo crontab -e
SHELL=/bin/bash
#reboot sleep 60 && /home/osmc/ikec_after_reboot.sh & >> /home/osmc/ikec.log 2>&1
Now edit your /etc/rc.local file and add the following.
sudo iked >> //home/osmc/iked.log 2>> /home/osmc/iked.error.log &
exit 0
Hopefully, this is helpful to you.
I started a Dancer/Starman server using:
sudo plackup -s Starman -p 5001 -E deployment --workers=10 -a mywebapp/bin/app.pl
but I'm unsure how I can stop the server. Can someone provide me with a quick way of stopping it and all the workers it has spawned?
Use the
--pid /path/to/the/pid.file
and you can kill the process based on his PID
So, using the above options, you can use
kill $(cat /path/to/the/pid.file)
the pid.file simply stores the master's PID - don't need analyze the ps output...
pkill -f starman
Kill processes based on name.
On Windows you can do "CTRL + C" like making a copy but Cancel in this case. Tested working.
I am using salvas' Net::Openssh module, but not able to figure how to use sudo. I have tried the following, but it is not working...
There is nothing printed in results. Single word commands like ls, pwd are also not producing anything.
version of sudo on target system:
$ /usr/local/bin/sudo -V
CU Sudo version 1.5.7p2
$ /usr/local/bin/sudo -h
CU Sudo version 1.5.7p2
usage: /usr/local/bin/sudo -V | -h | -l | -v | -k | -H | [-b] [-p prompt] [-u username/#uid] -s | <command>
since CU sudo does not allow more than 1 option at a time, i supply -k before supplying the command.
please note that this sudo version does not have -S switch to pass password using stdin. so it expects password from terminal. can u pl help more. thx.
$ssh->system("$sudo_path -k");
my #output = $ssh->capture({tty => 1,
stdin_data => "$PASS"},
$sudo_path,
"-p",'', "$cmd");
print " result=#output \n";
OR
$ssh->system("$sudo_path -k");
my #output = $ssh->capture({stdin_data => "$PASS"},
$sudo_path,
"-p",'', "$cmd");
print " result=#output \n";
It would be more helpful if you explained more of what you were trying to accomplish in your question, but I'm assuming you're trying to run a command that requires sudo via ssh using the Net::OpenSSH module in perl.
If that is the case, you should consider trying a 'heredoc' to script a series of commands.
Here is the PerlDoc for Quote-Like operators - look for the area talking about <<EOF as I've often used here docs to script things like this.
If for some reason using a heredoc within the Net::OpenSSH command doesn't work - Net::OpenSSH also works with Expect as documented here.
And if for some reason that doesn't work for you, you could always create a shell script that runs the command with sudo via a heredoc on the remote system, and just execute that script via your Net::OpenSSH connection.