Does anyone knows how to do this?
I want to disable all numpads, the ones located on the right side of the keyboard.
How can I do that? Ofcource, including how to revert it back to re-enable it too?
I have tried different stuff, like remapping:
xmodmap -e "keycode # = """
But I get an error:
xmodmap commandline1: bad keycode value
Did I do it wrong?
In Linux bash shell, How can I print file content and delete printed content from file?
I have a program writing texts to a file repeatedly. On a Linux shell prompt, I want to print the contents of the file and then delete printed contents from the file repeatedly, to make my file size small enough.
Do we have bash command lines or combinations to do that?
Specs are here. I am using a K65 RGB. I am using the ckb-git package from the AUR to provide basic input functionality.
Startup finished in 3.100s (firmware) + 5.648s (loader) + 31.800s (kernel) + 5.664s (userspace) = 46.213s
Startup finished in 2.873s (firmware) + 5.652s (loader) + 2.395s (kernel) + 5.855s (userspace) = 16.777s
Startup finished in 3.120s (firmware) + 5.654s (loader) + 31.735s (kernel) + 5.583s (userspace) = 46.093s
Startup finished in 2.879s (firmware) + 5.653s (loader) + 2.279s (kernel) + 6.008s (userspace) = 16.821s
As you can see, the pure act of having the keyboard plugged into the computer causes the kernel to boot about 30 seconds slower. This is kindof rediculous.
While the kernel is booting it just says:
starting version 218
if I dont have it plugged in. I believe this is referring to the kernel booting.
If the keyboard is plugged in, then it says:
starting version 218
[ random number] usbhid 3-2:1.1: can't add hid device: -110
worker [66] /devices/pci0000:00/0000:00:14.0/usb3/3-2 is taking a long time
[ random number about times two] usbhid 3-2:1.2: can't add hid device: -110
Then it boots to arch.
It is good to note that if I plug in the keyboard after it boots to arch, it takes about 30 seconds for the keyboard to be recognized (but I can still use my old keyboard).
Try to write a code which indicates whether a named file exists or not in your home directory or any of its subdirectories. Any help??
in PHP the fileinode() functions returns the inode of a file. I was wondering if I can use it to determine if a file was renamed, moved or modified.
I did some tests and it seems the inode stays the same after rename. Is this behavior consistent? Does it work for any type of file, on any linux distribution?
I have 3 monitors (1 intel + 2 nvidia). After some magic with xorg.conf they started to work, but nvidia monitors works as one wide monitor (any fullsize window half/half seperated).
Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
Screen 2 "Screen2" RightOf "Screen0"
Screen 1 "Screen1" RightOf "Screen2"
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
Option "Xinerama" "on"
EndSection
Section "Device"
Identifier "Card0"
Driver "intel"
BusID "PCI:0:2:0"
EndSection
Section "Device"
Identifier "Card1"
Driver "nvidia"
BusID "PCI:1:0:0"
EndSection
Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Monitor"
Identifier "Monitor1"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Monitor"
Identifier "Monitor2"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection
Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
EndSection
Section "Screen"
Identifier "Screen1"
Device "Card1"
Monitor "Monitor1"
Option "TwinView" "0"
EndSection
Section "Screen"
Identifier "Screen2"
Device "Card1"
Monitor "Monitor2"
Option "TwinView" "0"
EndSection
I'm so sorry for my English and idiotic xorg.conf :)
I am trying to have a file inputted by my script and put into a string to be put into another file.
./script.sh -u uuids.txt -s servers.txt
Each file will have a list with each value being on it's own line and where each line on each file belong together each time the string is made.
user:UUID:*:SERVER
That is an example of the string with the variables put into it.
I have the getops part right and I am able to print out the file contents correctly. I am asking for a way to add the lines one by one to the string to be added to a new line in another file.
I was thinking having awk split the lines within a loop that runs how ever many times for the lines in the files this would then save the overall string (pictured above) to a new line of a file with the >>.
I would like run remote ssh commands and have them always load server-side startup files by default. I am looking for a solution that does not require:
I am not looking to transport local environment variables to the remote shell. I want to run a remote command using the vanilla ssh <host> <command> syntax and have it run using the same environment a remote login session would get.
The below assumes bash is being used for simplicity
By default, remote ssh commands start a non-interactive, non-login shell. Quoting the man page:
If command is specified, it is executed on the remote host instead of a login shell.
You can see this more explicitly on the shell by running:
# the lack of 'i' indicates non-interactive
$ ssh localhost 'echo $-'
hBc
$ ssh localhost 'shopt login_shell'
login_shell off
But what if your remote command needs certain environment variables set? Being a non-interactive, non-login shell means neither .bash_profile or .bashrc will be sourced.
This is problematic, for example, if you're using tools like perlbrew or virtualenv and want to use your custom interpreter in the remote command:
$ which perl
/home/calid/perl5/perlbrew/perls/perl-5.20.1/bin/perl
$ ssh localhost 'which perl'
/usr/bin/perl
Explicitly invoke a login shell in the remote command
$ ssh localhost 'bash --login -c "which perl"'
Requires extra boiler plate each time
Explicitly source your profile before the command
$ ssh localhost 'source ~/.bash_profile && which perl'
Requires extra boiler plate each time
Set environment variables in ~/.ssh/environment
Requires root to enable this functionality on the server
Duplicates environment variables already set in server startup files
Set ENV and BASH_ENV
Does not work: .bash_profile and .bashrc aren't sourced
Setting in ~/.ssh/environment works, but requires root access to enable
Preface the command with the environment variables you need
Requires extra boiler plate each time (potentially a lot)
Duplicates environment variables already set in server startup files
dot file not sourced when running a command via ssh
Someone of our team wanted to recursively change the user permissions on all hidden directories in a users home directory. To do so he executed the following command:
cd /home/username
chown -R username:groupname .*
We were pretty surprised when we realized, that he actually recursively changed the permissions of all user directories in /home, because .* equals to .. as well. Would you have expected this behavior in Linux though?
With my Xubuntu 12 with xfce I have configured a standard 80x24 window size for my terminals. But opening a window results in a smaller 79x24 window. (To me this looks like a bug - at least my former Xubuntu system did not show that behaviour -, but in case I missed something I welcome pointers.)
What can I do to get the window size I configured through my profile setting?
Additional information (in case it matters): Some additional configuration for terminal windows I have done is; activating vertical scroll bar, changing the font size to a larger font, and using a bold face font. (I think that none of that should result in a reduction of the configured dimension which is defined in units of to be displayed characters, or so I think.) And I also already looked into the configuration file ~/.config/Terminal/terminalrc (as proposed in another SE question), but there's also just the things visible that I configured by the GUI, specifically the 80x24 setting.)
(In case it's a bug I'd also welcome hints for alternatives.)
I want to generate a HTTP request with CURL: 
The purpose is that, I could make such request without need to "acctually click on a webpage".
Do you guys think this is correct?
curl --data "GENERATE_SNAPSHOT=Generate Snapshot" http://ift.tt/1yfM2Jh
I am reading an article from lwn and it mentions the following:
Binder has a number of serious security issues when used outside of an Android environment, he said, so he stressed that it should never be used by other Linux-based systems.
Does anyone know which issues this author is referring to ?
in order to understand another answer:
find / -type d -print0 | while read -r -d ''; do ls -ltr "$dir" | sed '$!d'
the first step is to understand the usage of the option -r of the read command.
First, I thought, it would be sufficient to simply execute
man read
to lookup the meaning of the -r option , but I realized the man page does not contain any explanation for option at all, so I googled for it got some read -t , read -p examples but no read -r .
I'm looking for any information regarding how secure an encrypted Linux file system is when contained in a VirtualBox virtual drive on a Windows host? Specifically I'm looking for answers to the following questions:
Android provides a device driver based IPC mechanism called Binder. I see it as one of the staging drivers in Linux. Although I can have a linux kernel running with this device driver, if I want to use it for IPC between applications in my desktop Linux, what other steps do I need to complete ?
Any reference would be helpful.
Lets say I have two process A and B.I have a library called libsample.so. The question is, Can I load libsample.so dynamically to process B using Process A. If I can , How can I do it?
I need to check for damage to my graphics card. I suspect I have done damage to my gpu through overclocking. Now, whenever I do anything graphically intensive my screen will flash various colours and then turn off. The system is also then unresponsive.
Here you can find the Dmesg and Xorg logs after such an event.
My question is, what should I be looking for in the system logs to confirm this? Also are there other tools that can give me more diagnostic information about the hardware?
I need to append would be aliases to the .bash_aliases file through the echo command
For example I echoed this command echo 'cp -r .git ls | grep -v .gitignore ~/env/' >> ~/.bash_aliases to the .bash_aliases file and later created the alias alias uu=cp -r .git ls | grep -v .gitignore ~/env/ (note escape characters missing)
I was not able to echo onto the .bash_aliases file until I made the below permission changes:
sudo chmod 660 .bash_aliases
chown tech-ministry:tech-ministry .bash_aliases
The resulting permission changes:
-rw-r----- 1 tech-ministry tech-ministry 231 Mar 26 02:05 .bash_aliases
Previously the file was owned by root and I was unable to echo onto the .bash_aliases file as I was told I did not have sufficient privileges. I even tried with the sudo command, but I was still unable to append. Thus I changed permissions as stated.
Now whenever I open a terminal shell I see this:
bash: alias: -r: not found
bash: alias: .git: not found
bash: alias: 2my_comp.sh: not found
bash: alias: cron_vs_sudo.txt: not found
bash: alias: cust_packages.txt: not found
bash: alias: Desktop: not found
bash: alias: Documents: not found
bash: alias: Downloads: not found
bash: alias: env: not found
bash: alias: examples.desktop: not found
bash: alias: morning-ravine-7736: not found
bash: alias: Music: not found
bash: alias: my_computer.sh: not found
bash: alias: pack_me_in: not found
bash: alias: Pictures: not found
bash: alias: Public: not found
bash: alias: skype-install.deb: not found
bash: alias: Templates: not found
bash: alias: Videos: not found
I used chown to revise the permissions back to root:root and I sourced the file, but I still see the above 'bash: alias:' dump every time I open a terminal shell.
What have I done and how could I repair? Does the .bash_aliases file NEED to be root?
In my bash script I have the following line
[backtick]mosquitto_pub -t '/$location/[backtick]
With this I want to 'publish' to the MQTT stream. The publishing part works great but it takes the variable name $location literally, and doesn't substitute $location with the initialized value for like NYC,Paris or Tokyo.
Q: How can make it so that the assigned value/string gets substituted to $location when the code is executed
Is it possible for Ext4 file systems (or maybe another one understood by Linux) to assign different metadata (like modification time, owner, access rights) to several hard-links that refer to the same data. (I know that for the size this is impossible, of course).
Rationale: I want to create a simple de-duplicated archive. It can (and often will) happen, that files contain precisely the same data, but the metadata differ. My idea was to create a hard-link per file and then set the metadata accordingly. But changing one hard-link seems to also change the others. (Or maybe there's another solution to my problem?)
