There is a nice option when setting up zsh on Ubuntu However, on a fresh Arch Linux install the option is missing. Is there a way to have it (or maybe, I am being picky here) ? Answer This happens when you haven’t got a .zshrc and there’s a /etc/zsh/recommended.zshrc. If you say yes, it’ll j…
Tag: linux
OpenCV 3.1 Upgrade Leads to Linker Errors on Linux
I’ve recently upgraded from OpenCV 2.4.11 to OpenCV 3.1 by following this guide. This sudo make install seems to have worked successfully and when I run pkg-config –modversion opencv, I get the appropriate version (3.1.0). But for some reason, I am now running into linker errors, and even simple p…
Rabbitmq remote call with Pika
I am new to rabbitmq and trying to figure out how I can make a client request a server with information about memory and CPU utilization with this tutorial (https://www.rabbitmq.com/tutorials/tutorial-six-python.html). So the client requests for CPU and memory ( I believe I will need two queues) and the serve…
substitute consecutive tabs for “tNAt”
Have a badly formatted tsv file with empty fields all over the place. I wish to fill these empty spaces with “NA” on linux. I tried awk ‘{gsub(“tt”,”tNAt”); print$0)’ but that only substitutes one empty space to NA instance. Chaining the command awk ‘{gsub…
How to invert the l-flag of grep
First question here, so go easy (: I have a 385 files which are the result of simulations, named ###_result.dat. However, some of the results resulted in errors, which I can grep for using the -l flag since these files always contain the character “=”. So getting the error-files is no problem: Whe…
Remote access to web server on linux
I have access to a server running CentOS 6.7 on which I installed apache and configured the /etc/httpd/conf/httpd.conf file. I can see the webpage if I ssh to the server and run but I would like to access it using a real browser. If I try to access it from my computer, it tells me that this webpage is unavail…
SigCgt value is not getting updated in /proc//status file?
I have read about the signal handling in linux processes. I am using centOS 7.1 (kernel 3.10+). I am registering handler only for SIGTERM in my c++ program. As per my knowledge(not sure if my assumptions are correct). We can check all the signals a process is listening to in /proc/$pid/status file by using Si…
Why ls -Q give output as “Z\1” if the file name is ‘Z1’?
Why “ls -Q” give output as “z\1” if the file name is ‘z1’? The output is coming with double slash in between ‘z’ and ‘1’. Answer The -Q-Switch (also –quote-names) will quote the names. How this quoting is done is defined by the –quoting-s…
improperly configured at /accounts/login/
In order to simulate sdn networks i downloaded the mini net 64 bit version and imported it in vmware Workstation pro 12 and through github all the project related stuff have been installed but the thing is when i wanna run it i encounter an error , do you think it’s because of the mysql not being config…
Where is mod_passenger.so, installed with yum?
I have a combo of Centos 6-Apache-Passenger-Ruby. Install was made following instructions here. I also have whm, which means changes to httpd.conf must be made by click. While trying to include /etc/httpd/conf.d/*.conf, tells me there is an error because: Cannot load /usr/local/apache/modules/mod_passenger.so…