I run C++ program in Linux. There are several threads pool (for computation, for io, for … such things). The system call clock() gives me a way to measure the CPU time spent by all the CPU cores for the process. However, I want to measure the CPU time spent only by the threads in the computation threads…
No return after executing passwd command using ssh in script
I have one script which reads hosts IP from /etc/hosts file, do ssh and update the passwords there for the given user. However, the script is closed after setting password for the first host and not able to set password for rest of the hosts. Please find below files- /etc/hosts file- 172.x.x.x host1 172.x.x.x…
How to build evpp in Linux Mint
I want to use evpp library in my project but I cannot build it in my OS. My OS is Linux mint 18.1 and and I use the release build script in tools folder (release-build.sh). I am getting the following errors; I installed all third-part libraries like boost, glog and gtest look here. Am I missing something? Ans…
how to save “set solib-search-path”
I wonder linux gdb debugging. I have 1 execute file, 1 core dump file. so, I opened it in linux like this, but, I only show error message. so, I input command, and symbol read succeed. and, I input command and, I reopen dump file. like this, but still show same error message. I don’t want to show this e…
cygwin /dev/sd* disk association to hard drive
Under cygwin on Windows 7, how would I certainly determine the hard drive that some path /dev/sd* corresponds in Windows? For example, given cygwin path /dev/sdc, which Windows letter drive does it correspond, C:, D:, etc.? The following don’t appear available within cygwin; tool lshw, tool parted, path…
Emulate a mouse click without using the actual mouse on linux
I am working with a program that collects a lot of data then shows it to you in the program. Unfortunately, the program is poorly designed and requires you to “approve” each bit of data collected manually by clicking a checkbox to approve it. In order to automate this process, I wrote a small scri…
how can i cut one line on two on a cat /ect/passwd?
I’m trying to write a command that shows all odd lines of /etc/passwd: I’ve tried: but it didn’t work Is there a different way to obtain the result? Answer The step syntax is a GNU extension. sed ‘n;d’ should be the portable version of your sed invocation.
Output a linux command to a url/port or scocket instead of writing it to a file
I have a command which out outputs certain data which i store in a ext file using a ‘>>’ command.Now Instead of doing that I want to have a socket or a port on any server which will catch the output of the command.Basically i want to output all my script data to a socket or url which ever is
How to create a “fake filesystem” that forwards system calls to my program?
I would like to write a tool that can be used to mount archives such as tar, tgz, zip, 7z, etc. to some directory for as long as it’s running, such that I can then open it with whatever file manager I want. To do this, I would somehow need to make a fake filesystem that forwards system calls such
How to pick a free port for a subprocess?
I am writing a Python wrapper around Appium server. Appium accepts command-line parameter for a local port to bind to. Unfortunately, Appium cannot autoselect a free port for itself, so it either binds to explicitly specified port, or fails with EADDRINUSE. Even when telling it to bind to port 0, it will star…