i am trying to implement a TCP server that accepts multiple client nodes. However, the control is just stuck at select() and not moving beyond that. This is my code: However, the control never moves beyond the select statement. It just remain there even after i open a connection to the server with telnet: Why…
Tag: linux
Can substring expansion be used in dash shell or bourne shell?
I’m converting an app to a new image, and the existing commands use substring expansion to set the artifact version like so: mvn clean versions:set -DnewVersion=”0.1.$VCSINFO.I${INFO:0:6}.M$OTHER_INFO”. I’m using a ubuntu image that defaults to /bin/sh, and I am unable to figure out ho…
Unable to bind mount a Windows folder in a Linux SQL Server docker image
I’m trying to run the docker image mcr.microsoft.com/mssql/server:2019-latest on a windows host. When running this command line, everything works fine: When I try to bind mount the /var/opt/mssql/data folder to access it’s content from my windows host, I get the following error: It looks like this…
RStudio Server on linux: how to create a shiny app that immediately returns user input text if button OK pressed, or FALSE if button CANCEL pressed
I want my function to implement a dialog with an editable text box using a shiny app. I.e. calling the function should open a shiny app displaying some text for the user to edit, then press the ‘Ok’ button to close the app and return the edited text or the ‘Cancel’ button to close the …
Put QpushButton into drop down menu if window/toolbar size/width is reduced
I have a QToolBar full of QPushButtons. As the window is resized to reduce its width, the width of toolbar is reduced. If the width is reduced beyond a certain point, the buttons starts disappearing. I think the situations is understood. There are certain situations when someone has to reduce the window width…
Mount seeded volume on linux host
I’d like to create a Database image and seed it with some initial data. This seems to work fine, since I’m able to create a container with a volume managed by docker. However, when I try to mount the volume to a directory on my linux host machine, it is created empty instead of seeded. After sever…
shell if statment executing even if its not true [closed]
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. Closed 2 y…
How to give permission to root user generated file by other user in linux?
I am trying to giving permission to root user generated file but not able to do this. Can anyone help me how to do this? I tried: Example: Expected result: Answer First of all, I can’t see what you’re doing by “echo -e ‘password’”. The ‘>’ character means “ou…
How to avoid quotes (“…”) in shortcut-ed printk Macros inside Linux Kernel Modules
I have created a set of shortcut Macros for Linux Kernel printk to prefix with the module name and to have a set of aliases for severity. Using those Macros like this: Now the issue is that the final output in the Kernel Ring Buffer get quoted in the following way: Do you have any idea of how to avoid
Not able to convert the csv to HTML in Jmeter
I am running load test on one of my sftp server application using jmeter. I run my jmx script as below Script does have Simple Data Writer which creates csv file with result, which i convert into html using below command running on cmd from bin folder of jmeter. It was working couple of days back and now if i