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How to hide kernel boot message on the Google Coral ?
# cat /etc/debian_version
10.0
but i can't find the grub file (i tried, like for debian, /etc/default/grub ... nothing) to edit and add "quiet" (like for a regular Ubuntu/Debian), then regenerate grub :(
embeded linux usually uses uboot instead of grub as it is too large. Specifics on how to customizing kernel should take more researches, however, you can add loglevel=0 to the kernel command line to eliminate some kernel messages.
Download boot.txt:
$ curl https://coral.googlesource.com/uboot-imx-debian/+/refs/heads/master/debian/boot.txt\?format\=TEXT | base64 --decode | tee boot.txt > /dev/null
Install mkimage:
$ sudo apt install u-boot-tools
Make your necessary changes in the cmdline="" line, for this example, we need to add "quiet loglevel=0":
cmdline=<preexsisting> + quiet loglevel=0
compile to boot.scr:
$ mkimage -A arm -T script -O linux -d boot.txt boot.scr
replace old boot image file
$ mv boot.scr > /boot
Reboot and the new kernel params should be loaded.
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Closed 4 years ago.
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I'm testing an ansible role using molecule. The role install a corporate binary over which I've no insight, I'm just mean to ./binary --silent and that's it. Over RedHat.
It work for a RedHat 6.9 VM. But it doesn't work over the docker container registry.access.redhat.com/rhel6:6.9.
The error message says:
"Operating system bad language (en_US not found)".
What could be missing from the container that would be on the VM? Some localedef ...? I wasn't able to find a doc about this, but is there some RedHat description about the delta between their "minimal install from ISO" VMs and containers?
Thanks for any help
If you run locale -a on the Docker image you're using, you'll get the following output:
C
en_US.utf8
POSIX
Run the same command in your VM and compare output. If it contains line en_US (without utf-8 suffix), try adding the following lines dicrectly below FROM directive in your Dockerfile:
RUN localedef -v -c -i en_US -f UTF-8 en_US; exit 0
RUN sed -i 's/en_US.UTF-8/en_US/g' /etc/sysconfig/i18n && source /etc/sysconfig/i18n
This will generate locale en_US with encoding UTF-8 named en_US (without any suffix).
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Closed 7 years ago.
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How can I Iinstall a package on Travis-ci with sudo:false in travis.yml ?
I have my travis.yml :
sudo: false
install:
- wget http://security.ubuntu.com/ubuntu/pool/main/i/icu/libicu52_52.1-3ubuntu0.4_amd64.deb
- sudo dpkg -i libicu52_52.1-3ubuntu0.4_amd64.deb
I have an error :
sudo: must be setuid root
The command "sudo dpkg -i libicu52_52.1-3ubuntu0.4_amd64.deb" failed and exited with 1 during .
Yes you can, at least some.
Travis has a whitelist of allowed packages you can install from using the containerised environment. Instead of using wget and dpkg, or apt, you define the packages in your yaml under the addons section. Check https://docs.travis-ci.com/user/installing-dependencies/.
In the yaml you'd have something like:
addons:
apt:
packages:
- ncftp
ncftp is whitelisted here.
If you need packages which are not whitelisted, you can set sudo: true and your build will be launched in a non-containerised environment, so you have root (sudo) access to install whatever you want. Alternatively you can raise an issue on their Github to add a whitelist for your package.
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It would help me to setup my system-wide proxy. I'm using latest Ubuntu and tried /etc/X11/xinit/xinitrc ~/.xinitrc and ~/.xsession,
export HTTP_PROXY=http://....
But that did not work.
Apparently i3 uses sh to launch stuff, and does not source $PATH from ~/.bashrc :
cat ~/.xsession-errors
(...)
/bin/sh: 1: mycommand: not found
So, just create a ~/.xsessionrc file and put your statements in it :
export HTTP_PROXY=http://....
Then logout and back in ; It should work now.
System-wide environment can be setup by placing a script in /etc/profile.d/
For example, you may create /etc/profile.d/proxy with your
export HTTP_PROXY=http:// # enter your proxy settings here
Then chmod +x this file, then reboot :
chmod +x /etc/profile.d/proxy
systemctl reboot
After reopening your session you could check the variables are there :
env | grep HTTP
You should see the variables set with the values you entered in the profile script.
In order to set system wide proxy settings you can add the following:
export http_proxy='http://172.27.100.5:4444/'
export https_proxy='http://172.27.100.5:4444/'
export ftp_proxy='http://172.27.100.5:4444/'
export no_proxy='localhost,127.0.0.0/8,::1
to your bash.bashrc file which is located in /etc folder. Of course, you should replace addresses with your ones. It works at least for Debian.
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Is it possible to create a batch file thats check if a website / url redirect to another site?
for example check if http://www.google.com/ redirect to http://www.google.com/randomsite.php/ and i would be great if it could do a status like:
www.google.dk/ Redirects to www.google.dk/randomsite.php/
for example with echo and some varible like:
echo %Google1% Redirects to %Google2%
And that would look like this
www.google.dk/ Redirects to www.google.dk/randomsite.php/
There are no built-in tools in Windows, but if you download a Windows compatible version of curl, you can use that to print the headers. This blog article seems a good place to start.
For example:
curl -sL http://www.stackoverflow.com --head | find "301" OR
curl -sL http://www.stackoverflow.com --head | find "302"
If found, the %ERRORLEVEL% variable will be greater than 0, so you can check that.
Under Linux, curl -I http://yoururl.com. You just need the first line, so start maybe with curl -I http://yoururl.com | head -n 1
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Apple's iOS SDK use a modified version of pngcrush for converting png files in iOS bundles.
Their version can also revert the changes (using the "-revert-iphone-optimizations" switch), but the original version can't.
Is there a tool that can be run on Linux and revert the iphone optimizations?
Thanks.
iphone-fixpng works in Linux. See this discussion explaining what it does. I'm linking to web.archive.org because the original is down.
You can choose to use one of this:
Install Hackintosh inside linux, with VirtualBox. install Xcode inside it, then do something like this
$ /Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/pngcrush -dir uncrushed -revert-iphone-optimizations -q *.png
This uses a modified pngcrush from apple to undo its optimizations. Guess this will work with all crushed pngs. See this for more accurated command xcrun
Download iPIN.py from this blog and execute as
$ python ipin.py
This will uncrush all files from actual directory and its subdirectories. Don't worry about call it twice, from my experience does not corrupt already uncrushed pngs. From here you will find that ipin.py does not deoptimize all apple pngs
It (ipin.py) cannot handle multiple IDAT chunks, does not work with Adam7 interlaced images, and does not fix pre-multiplied alpha.
Use an specific gnome binary tool. This needs a few low level steps:
$ git clone https://github.com/hadess/fixpng-thumbnailer.git
$ cd fixpng-thumbnailer
$ ./autogen.sh
$ make
$ sudo make install
After that, you have available a new command gnome-fixpng-thumbnailer which works like this
$ gnome-fixpng-thumbnailer [INPUT FILE] [OUTPUT FILE]
Take care with this command, because it corrupts pngs if is called twice on same png.
I use it this way:
$ for file in *.png; do echo " $file";gnome-fixpng-thumbnailer $file $file; done
You will guess why echoed the filename. Thats because this command could fail silently, (no $? with nonzero if fails) and the only clue you will have is a "ZLib error! -3" message. It's a quick solution because funnily enough you will find ipin.py does uncrush those files.
Read this for yet another tool around pngdefry. It provides an invaluable info about all this stuff -even its source- but I haven't tried myself.
My hope is in pngcrush absorbs those functionality so you have it out of the box, at least I have send a mail to pngcrush maintainer (hi Glenn).