Karl Morrison's questions

I'd like to speed up connecting to specific servers.

I have the servers let's say:

123.123.123.1
123.123.123.2
123.123.123.3

I normally connect with the following:

ssh -p 12345 [email protected]

This is a pain because the only difference between the servers is the last number of the ip.

I tried the following code:

alias ssht='{ ip=$(cat -); ssh -p 12345 my_user@"123.123.123.$ip"; }<<<'

However I get an error:

karl@karls-laptop ~/scripts $ ssht 1
Pseudo-terminal will not be allocated because stdin is not a terminal.

Is there a way to get this working?

I've seen a few posts wanting the same regarding usage, however the answers ALWAYS refer to installing some third party tool.

I do not want to install anything.

Any one liners? The following would be a nice output:

CPU 11% RAM 20% HDD 85%

Ok so i'm trying to build from source and to do that I must install it's dependencies.

So one of the dependencies is the following:

karl@karl-ux303ln:~/dev/RBDOOM-3-BFG/neo(master)$ sudo apt-get install libsdl2-dev
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies.
 libsdl2-dev : Depends: libpulse-dev but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

So I check libpulse-dev:

The following packages have unmet dependencies.
 libpulse-dev : Depends: libpulse0 (= 1:4.0-0ubuntu11.1) but 1:4.0-0ubuntu11.1+kxstudio1 is to be installed
                Depends: libpulse-mainloop-glib0 (= 1:4.0-0ubuntu11.1) but 1:4.0-0ubuntu11.1+kxstudio1 is to be installed
E: Unable to correct problems, you have held broken packages.

From here I'm pretty much stuck. I'm aware that pulse is responsible for the sound, but I'm lost as to how to fix such an issue.

I also tried everything this answer had to offer: https://askubuntu.com/a/142808/130518

I've installed mongodb v3.4. This starts up on boot.

So I'm wondering, how to I find out what is starting this up (and how to disable it from starting on boot)?

The following did not work:

How can I stop mongodb from starting on system boot (old)

Command to list services that start on startup? (old)

root@dev-demo-karl:/srv/www# supervisord -v
3.3.1

Trying to get supervisorctl working:

root@dev-demo-karl:/srv/www# supervisorctl
http://localhost:9001 refused connection

My config:

[supervisord]
nodaemon=true

[supervisorctl]

Supervisorctl doesn't seem to let me in:

$ supervisorctl -c /etc/supervisor/supervisord.conf
Error: .ini file does not include supervisorctl section
For help, use /usr/bin/supervisorctl -h
$ cat /etc/supervisor/supervisord.conf 
[supervisord]
nodaemon=true

I have both specified the config and [supervisord]. Is it possible my config is in the wrong place?

I've run into a problem on one of my servers running 16.04: there is no disk space left.

I have no idea what is taking up the space. Is there a command to list the current directory sizes, so I can traverse and end up in the directory taking up all the space?

I'd like to run the command /usr/sbin/cron in the foreground and not as a daemon. Is this possible?

I've been moving a private key manually via the terminal and I'm getting an error. I suspect this error is caused by malformed key.

Is there a way to check if a key string is correct?

I have the following output via ps aux | grep node:

karlm    17551  1.4  0.7 1000592 93604 pts/2   Sl   09:54   0:01 node -r babel-register -r babel-polyfill src/index.js --config=c.json

I try to kill this with killall node.

It doesn't kill the process though?

I have a file. I'd like to echo out the full path to it in the terminal.

Which command would?

States here that the package gtk+-3.0 was not found:

karl@karl-ux303ln:~$ pkg-config --cflags gtk+-3.0
Package gtk+-3.0 was not found in the pkg-config search path.
Perhaps you should add the directory containing `gtk+-3.0.pc'
to the PKG_CONFIG_PATH environment variable
No package 'gtk+-3.0' found

However I apparantly have gtk3 installed:

karl@karl-ux303ln:~$ dpkg -l libgtk* | grep -e '^i' | grep -e 'libgtk-*[0-9]'
ii  libgtk-3-0:amd64                            3.14.15-0ubuntu1~14.04~ricotz1                              amd64        GTK+ graphical user interface library
ii  libgtk-3-bin                                3.14.15-0ubuntu1~14.04~ricotz1                              amd64        programs for the GTK+ graphical user interface library
ii  libgtk-3-common                             3.14.15-0ubuntu1~14.04~ricotz1                              all          common files for the GTK+ graphical user interface library
ii  libgtk2.0-0:amd64                           2.24.23-0ubuntu1.3                                          amd64        GTK+ graphical user interface library
ii  libgtk2.0-bin                               2.24.23-0ubuntu1.3                                          amd64        programs for the GTK+ graphical user interface library
ii  libgtk2.0-common                            2.24.23-0ubuntu1.3                                          all          common files for the GTK+ graphical user interface library

However I can't seem to find the file gtk+-3.0.pc:

karl@karl-ux303ln:~$ sudo find / -name "gtk+-3.0.pc"
karl@karl-ux303ln:~$ 

Any ideas? I'm trying to use cmake however it can't find gtk3.

The the following to add my user to the group:

sudo usermod -aG vboxusers karl

Got the error message:

usermod: group 'vboxusers' does not exist

My groups are as following:

karl adm cdrom sudo dip plugdev lpadmin sambashare vboxsf

I'm using VirtualBox 5.0.14, Ubuntu 14.04, Guest Additions 5.0.14 and Extension Pack 5.0.14. I can see my USB device in my host OS.

I am currently:

root@sensu-server-client:/# 

I wish to change to:

sensu@sensu-server-client:/# 

How does one do this. I tried: su sensu but nothing happens.

I am trying to get some commands to run in these files nothing is working.

First file ~/.xinitrc:

#!/bin/bash
echo DERP >>  /home/karl/xinitrc-derp1.log

Second file ~/.xsession:

#!/bin/bash
echo DERP >>  /home/karl/xsession-derp1.log

The logs just do not appear. I'm running pantheon with Ubuntu 14.04.

#!/bin/bash
ids=$(xinput list | awk '/SteelSeries Sensei Raw Gaming Mouse .*pointer/ {print $8}' | sed 's/id=\(.*\)/\1/')

if [ -z "$ids" ]; then
  exit 0;
fi

read -a ids_array <<< $ids

echo fixing id ${ids_array[0]}
xinput set-prop ${ids_array[0]} 'Device Accel Profile' -1
xinput set-prop ${ids_array[0]} 'Device Accel Constant Deceleration' 2.5
xinput set-prop ${ids_array[0]} 'Device Accel Adaptive Deceleration' 1
xinput set-prop ${ids_array[0]} 'Device Accel Velocity Scaling' 1

echo fixing id ${ids_array[1]}
xinput set-prop ${ids_array[1]} 'Device Accel Profile' -1
xinput set-prop ${ids_array[1]} 'Device Accel Constant Deceleration' 1.5
xinput set-prop ${ids_array[1]} 'Device Accel Adaptive Deceleration' 1
xinput set-prop ${ids_array[1]} 'Device Accel Velocity Scaling' 1

sudo sensei-raw-ctl --show
sudo sensei-raw-ctl --polling 500
sudo sensei-raw-ctl --cpi-on 450
sudo sensei-raw-ctl --cpi-off 5670

unset ids
unset ids_array

I wish for the following script to run once when I login or when the computer starts up. The above script is located in /home/karl/.scripts/startup/sensei-raw-startup.sh.

I DO NOT wish to use the GUI to add the script. I wish to learn a bit more about how to do it manually.

What files do I need to create, what must be in them and where should they be located to be able to run my script which is located in the said directory.

Now while installing the dependencies I've realized that they actually take up quite a lot of space (depending on what the dependencies are). So my question is:

• How do I remove all of the dependency files which my operating system does not require? Is sudo apt-get autoremove enough?

I've been building a lot of software from source as I've been wanting to learn it for quite a while now. The following happens:

1. Download source files (normally a tarball file)
2. Install dependencies (normally a bunch of libraries)
3. Configure, build and either install or just run

I am still confused as to what files relate to what etc. so my question might appear as stupid.

I have 128gb of ssd hard drive space. This is not a lot for me. I need every single bit!

When building from source it compiles the file into a so called dist folder which can then be run (or installed). So my question is:

• As I assume the source files are not needed since I built the software, how do I remove these files safely?

UNetbootin is not detecting a mounted USB, the image below shows.

I am currently using the following command to get a process:

ps -xa | grep node

Which results in the following:

13611 ?        Sl     0:03 /opt/brackets/Brackets-node /opt/brackets/node-core
20713 pts/1    Sl     0:00 node --harmony app.js
20838 pts/1    S+     0:00 grep node

I use the command kill -9 20713 to kill the node --harmony app.js process.

How can I kill the node --harmony app.js every single time with one command? I am tired of typing in the process number every time.