| To: Thomas A Watson who wrote (448) | 5/12/2017 3:13:31 PM | | From: FJB | | | | Free ebook for the next four hours. packtpub.com
Practical Linux Security Cookbook
As more and more organizations adopt Linux for their networks and servers, the number of security threats grows and grows. As a sysadmin, you'll be the first point of call when hackers threaten your network - and this free eBook will be your bible for building and maintaining a secure Linux system. |
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| From: Thomas A Watson | 11/10/2018 11:58:42 AM | | | | | | where is the mouse on your screen?
In a terminal run mousepos using xdotool
need xdotool installed
sudo apt-get install xdotool
or
watson@xen2[109]xterm -geometry 50x12 -e mousepos
watson@xen2[105]which mousepos
/usr/local/bin/mousepos
watson@xen2[106]
watson@xen2[106]cat `which mousepos`
#!/bin/csh
# /usr/local/bin/mousepos
set c=0
set last=99
while ( 1 )
xdotool getmouselocation --shell >ztmp
sleep .5s
# cat ztmp
set x=`cat ztmp|head -1`
set y=`cat ztmp|head -2|tail -1`
set screen=`cat ztmp|tail -2|head -1`
set window=`cat ztmp|tail -1`
echo $x $y" "$c" " $screen $window
echo ""
if ( $c < $last ) then
@ c++
else
set c=0
endif
end |
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| From: Thomas A Watson | 11/17/2018 12:16:16 PM | | | | | | ubuntu remote desk top.
How To Configure Remote Access To Your Ubuntu Desktop
howtoforge.com
On a local network you can display your linux desktop on a windows machine. you can also control it or run it. I followed the link above instuctions and on Win7 manchine display ubuntu 16.04 unity desktop and could control it in paralell with the the unbuntu machine.
I could not on my linux 14.04 xen2 manchine display unity desktop of xen1 machine. xen2 is fvwm window manager, not unity.
I tried starting nautilus that seems to gnomify my fvwm weirdly. same result.
in linus use remmina.
error in terminal.
]Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
loading channel cliprdr
unable to connect to 192.168.1.118:3389
Error: protocol security negotiation or connection failure
Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.
nautilus starts with error
watson@xen2[229]nautilus
(nautilus:15767): Gtk-WARNING **: Failed to register client: GDBus.Error:org.freedesktop.DBus.Error.ServiceUnknown: The name org.gnome.SessionManager was not provided by any .service files |
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| From: Thomas A Watson | 11/30/2018 7:36:22 AM | | | | | | Switching from multidisplay to a single display and changing video cards to support new resolution of monitor.
Basic OS of computer.
watson@xen2[22]uname -a
Linux xen2 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 11:50:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linu
This computer was running using a GALAXY MDT Nvidia Geforce GT610 1Gb PCIe card.
The card drove 4 Samsung 1204b monitors of 1600x1200.
I believe I used unity desktop to originally set up the Displays to create a 3200x2400 desktop.
But for working I used fvwm2.
The machine always boots to text mode. Then I start fvwm2 with xinit /usr/bin/fvwm2 or I could start unity
with xinit /usr/bin/unity.
The new monitor is an Acer ET0 Series ET430K IPS 43" LED Monitor IPS 4K UHD HDMI w/ Speaker.
The GT610 does not support 4k 3840 x 2160 resolution. So I choose a Geforce GT 1030
It has a far superior GPU over the GT610, but it is not a cutting edge gaming care. In that I never game, that did not matter to me.
After installing the new vid card and connecting up the monitor linux booted no prob to text mode.
I logged in and xinit /usr/bin/fvwm2 worked ok but the screen res was 12??x10??
I googled all manner of questions about linux ubuntu 16.04 and all I found was gui this and gui that in unity. Well xinit /usr/bin/unity would not come up. There were posts attempting to explain how to set up Xorg config but none really explained anything.
So finally I went to nvidia.com nvidia.com then Drivers Geforce
Did a manual search. I figured out that a 1030 card was a series 10 card in nvidiaeze.
So I menued Geforce, Geforce 10 series, Geforce GT 1030, linux 64-bit, English (US), Recommended Certified
Search...
Linux x64 (AMD64/EM64T) Display Driver
| Version | 410.78 | | Release Date | Thu Nov 15, 2018 | | Operating System | Linux 64-bit | | Language | English (US) | | File Size | 102.94 MB |
Download /XFree86/Linux-x86_64/410.78/NVIDIA-Linux-x86_64-410.78.run
*This download includes the NVIDIA display driver and GeForce Experience application. Details for use of this NVIDIA software can be found in the NVIDIA End User License Agreement.
Downloaded NVIDIA-Linux-x86_64-410.78.run
watson@xen2[25]file NVIDIA-Linux-x86_64-410.78.run
NVIDIA-Linux-x86_64-410.78.run: POSIX shell script executable (binary data)
This is Nvidia propriatary and not open source. To me that means it will use all of the power of the card.
Open source is nice but in video drivers, I prefer the companies stuff. It often solves many problems.
So I chmod 777 NVIDIA-Linux-x86_64-410.78.run and ran it. Oh I always create user root and login as root to manage my linux systems. I do not sudo.
The program ran no brain, asked obvious questions and permissions and agree terms. It reported it had created a new xorg config.
Then as me, not root xinit /usr/bin/fvwm2 and all is right with the world.
So I did not have to relearn all about mode lines and xconfig and edit some files some where to get it to work. How many times have I done that in the past? who knows..
I assume unity will work now also, but have not tested it yet. |
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| From: Thomas A Watson | 12/16/2018 7:45:00 PM | | | | | |
I came across another sysinfor tool for linux. It is like a belarc but more in a sense. it is called hardinfo.
I did sudo apt-get install hardinfo. I am running on ubuntu 16.04 and I bring it up from a terminal in my fvwm2 window manager. Also it work in unity. I expect it is compatible with most linux window managers.
It has numerous sub sections and will also create a web page of all results.
ikiw.homeip.net /xen2/hardinfo_report.html shows a full report. edited to sanitize. passwords etc.
It even cantains some bench marks.
Benchmarks| CPU Blowfish | | CPU Blowfish | | This Machine | 3680 MHz | 2.819 | | Intel(R) Celeron(R) M processor 1.50GHz | (null) | 26.1876862 | | PowerPC 740/750 (280.00MHz) | (null) | 172.816713 |
| CPU CryptoHash | | CPU CryptoHash | | This Machine | 3680 MHz | 546.596 |
| CPU Fibonacci | | CPU Fibonacci | | This Machine | 3680 MHz | 1.268 | | Intel(R) Celeron(R) M processor 1.50GHz | (null) | 8.1375674 | | PowerPC 740/750 (280.00MHz) | (null) | 58.07682 |
| CPU N-Queens | | CPU N-Queens | | This Machine | 3680 MHz | 4.724 |
| FPU FFT | | FPU FFT | | This Machine | 3680 MHz | 0.747 |
| FPU Raytracing | | FPU Raytracing | | This Machine | 3680 MHz | 3.481 | | Intel(R) Celeron(R) M processor 1.50GHz | (null) | 40.8816714 | | PowerPC 740/750 (280.00MHz) | (null) | 161.312647 |
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| From: Thomas A Watson | 2/5/2019 11:53:43 AM | | | | | | this is a post on some apps that i have found useful.
scrot is a very usefull screen capture utility
In a terminal.
cd to a directory
scrot -s some.filename.jpg
then you use the mouse to define the square to grab and it is saved as some.filename.jpg
no -s and you get the entire desktop.
A useful addon awesome screenshot can capture part or all of a webpage in a browser and then take image and allow some editing in the browser. default saves as png, but you can set to save as jpg. |
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| From: Mario :-) | 2/27/2019 5:09:47 PM | | | | | | Speedcrunch - high precision scientific calculator. I love it. It calculates 'on the fly', you don't ever need to finish your entry with <enter> key, saves a click. It is very fast, has more digits that regular calculator and it is loaded with goodies such as formulas, constants.... If you haven't tried it yet, give it a shot.
Also, i'm moving from Manjaro to MX Linux - Debian based, but developers are keep back-porting newer apps so you almost have some kind of semi rolling distro:
- stable Debian
- updated apps
- bunch of very useful tools (like snapshot, create your own install-abe iso from your current system with 3-4 mouse clicks, basically you have exact copy of your system that you can put on another computer...)
- oh, and it does not use systemD (although it is present for compatibility)
Will be back in a half of year or so ;-) |
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| From: Thomas A Watson | 9/3/2019 7:28:42 PM | | | | | | Running x apps on remote system using an ssh tunnel.
SSH X11 Forwarding youtube.com this video explains it all.
on server. this is the computer where x app runs. and displays on the client.
make sure you have xauth
apt list
sudo vi /etc/ssh/ssh_config
verify or edit
ForwardX11 yes
ForwardX11Trusted yes
after save
sudo service ssh restart
ssh stop/waiting
ssh start/running, process 2883
sudo vi /etc/ssh/sshd_config
X11Forwarding yes
X11DisplayOffset 10
after save
sudo service ssh restart
on client starting ssh with X forwarding.
ssh -X right # slowest response
echo $DISPLAY
ssh -X -C -c blowfish-cbc,arcfour right # -C compression -c cyfers blowfish-cbc,arcfour this gives faster response.
ssh -Y right # trusted.
youtube.com how to enable X11 forwarding on linux, |
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| To: Thomas A Watson who wrote (460) | 10/14/2019 11:46:40 PM | | From: FJB | | | | Welcome
The Unix Game is a fun, low-barrier-to-entry programming contest where players solve coding challenges by constructing "pipelines" of UNIX text processing utilities to compute the solution. Press the button below to take a quick tour around the UI:
unixgame.io |
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