I have an input file Input.txt with the following sample keywords: I also have a file Text.txt to search such as: I want to print grep Keyword followed by a match if the grep finds a match. The desired output: Answer With awk you could do something like this: In a more readable format it would be:
Tag: linux
How to include or link ncurses/ curses library in Codeblocks 13.12 in Ubuntu 16.04?
Hope you are doing great! I am using codeblocks 13.12 in my Elementary OS (Loki) which is based on ubuntu 16.04. Recently , I tried to use getch(), getche() function in my C-language coding and to do that i installed ncurses library in my system. When i try to build code, I get two error messages- Undefined r…
Using sed piped with w command show user with the largest idle time
the w command produces something like this: I must get a sed script that prints the user with the longest idle time. But the problem is that w shows the idle time in 3 different formats: 1) in seconds: ending with an ‘s’, 2) mm:ss (not ending with ‘m’ or ‘s’), and 3) hh:mm …
Compiling Python 3.6: Can I delete src folder after make install?
On my ubuntu 16.04 I just executed Can I delete src/Python-3.6.0 folder? Answer @realtbo As you make installations using sudo command in LINUX, it is never suggested to delete those files. Any file which is in user is always meant to be kept alive. Deleting these files may cause your environment to break, whi…
Which perf events can use PEBS?
I want to understand which events can have the precise modifier on my CPU (Sandy Bridge). Intel Software Developer’s Manual (Table 18-32. PEBS Performance Events for Intel Microarchitecture Code Name Sandy Bridge) contains only the following events: INST_RETIRED, UOPS_RETIRED, BR_INST_RETIRED, BR_MISP_R…
compare columns from different files and print those that DO NOT match
I have two files, file1 and file2. I want to compare several columns – $1,$2 ,$3 and $4 of file1 with several columns $1,$2, $3 and $4 of file2 and print those rows of file2 that do not match any row in file1. E.g. file1 file2 I want to have as output: I have seen questions asked here for finding
How to create an AWS Ubuntu 12.04 x64 AMI from scratch? [closed]
Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. This question does not appear to be about a specific programming problem, a software algorithm, or software tools primarily used by programmers. If you believe the question would be on-topic on another Stack …
How do I use a newer perf tool front end with a record from an older perf version
I am running perf record on an older version of the kernel on an ARM board. The kernel version is 3.18.21-rt19 The perf version on the board is similarly perf version 3.18.21. While I can record and use the report feature on this perf, the TUI for report on this version is quite awful/non-existent. Instead of…
Jenkins API response tuning
We have built a dashboard on top of Jenkins which enables users to see only jobs relevant to the project and also trigger a build. The UI is built using reactJS and the backend is JAVA REST WebServices. WebService calls the Jenkins api to fetch Job information and converts the data to JSON for feeding the UI.…
libusb-1.0 hotplug events stop working in parent after fork(), when child calls libusb_exit()
I’ve been developing an application that monitors the USB device tree using libusb_hotplug_register_callback(). When a device that matches some criteria is attached, it will fork() and exec() an application to handle this device. The application has been working fine for some time now, but I’ve co…