There are PostgreSQL binaries in yum package except for server and client. I can assume the purpose of binaries, but I want to check it in documents. How can I find the documents for them? Answer or (old RHEL/CentOS) If you have downloaded the RPMs:
unbound method mainloop() must be called with Tk instance as first argument (got nothing instead)
The below code is a simple code which I tried to check if Tkinter worked… Acoording to https://www.tutorialspoint.com/python/python_gui_programming.html this should open a blank window But the following error message was received Any suggestions… Answer Tkinter.Tk() creates an instance of Tk() obj…
How to feed a large number of samples in parallel to linux?
I’m trying run following command on a large number of samples. I have: but I have thousands of these samples to process. Each sample takes about a day or two to finish on my local computer. I’m using a shared linux cluster and a job scheduling system called Slurm, if that helps. Answer Write a sub…
Show all sourced files in ZSH
I want to see which files got sourced while starting the Z-shell. Does it even keep track and if yes is there a way to list all the files? Answer You could do a at the beginning of the very first file which gets sourced. See man zshoptions.
ArangoDB Unattended Install in Vagrant Box
Trying to setup an Unattended install of ArangoDB in a Vangrant Ubuntu box. I’ve followed the Unattended install instructions here: https://docs.arangodb.com/3.1/Manual/GettingStarted/Installing/Linux.html However, this accounts for the password prompts, but not for the database upgrade and backup datab…
How to save movie in mjpg-streamer?
I have installed mjpg-streamer on Raspbarry Pi,and it ran well. But how to save movie in my sdcard? I tried mjpg-streamer/mjpg-streamer-experimental/mjpg_streamer -i “mjpg-streamer/mjpg-streamer-experimental/input_uvc.so” -o “mjpg-streamer/mjpg-streamer-experimental/output_http.so -w mjpg-st…
Unexpected behaviour of double quotes in bash script
I’ve created a variable which looks like this: If I print it to the terminal, using echo $firstAndLastLines, I get the following output: root bin daemon adm lp Privilege-separated SSH Account used by the trousers package to sandbox the tcsd daemon Norbert Fogarasi But, if I use echo “$firstAndLast…
ffmpeg HLS transcoding and chunks upload to remote server
I am trying to create a so called origin server for storing the hls chunks and the manifest file on a remote server. The sending machine running ffmpeg is with IP: 192.168.178.50 and the web server which has to store both the HLS chunks and the manifest file is with IP: 192.168.178.100. My ffmpeg transcoding …
pthread_self() doesn’t return a meaningful thread id?
I was running this program on RHEL 5 with gcc4.1.2. Seems the syscall can give the correct thread id(same like process id), but pthread_self doesn’t give meaningful result. Is it because pthread_self is not portable? Answer If you read man pthread_self, which you should: Thread identifiers should be con…
linux running few scripts launch from a central script
I have several bash script which contain in them infinite while loop. I would like to run all of them from a single script: what I get is that it stuck on the first script and it does not proceed to the next one to run them simultaneous. Answer Notice the & symble at the end of each line, that