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Save modifications in place with NON GNU awk
Any of those help Since main aim of this thread is how to do inplace SAVE in NON GNU awk so I am posting first its template which will help anyone in any kind of requirement, they need to add/append BEGIN and END section in their code keeping their m
TAG :linux
Date : September 23 2020, 10:00 PM , By : bushan1891
Why sed script is not deleting lines?
This might help you If you need to remove the matching lines, you should not use the s command.Use
TAG :linux
Date : September 23 2020, 09:00 PM , By : Farzan Kolini
npm start doesn't work for ReactJS anymore
I wish this helpful for you Found the solution. npm had been configured to ignore scripts. Running npm config set ignore-scripts false fixed the problem.
TAG :linux
Date : September 23 2020, 06:00 PM , By : Eli Senoo
Remove duplicated rows based on two columns (in both directions) and retain only one
this will help I'd like to remove duplicated rows from a tab delimited file that look like this:
TAG :linux
Date : September 23 2020, 04:00 PM , By : E. Wathen
Locate files older than 7 days and contain the word "t" in the third char of the file name
help you fix your problem To restrict to filenames having a "t" in the third position, like "25t.txt" or "data-19.doc", add this clause:
TAG :linux
Date : September 23 2020, 10:00 AM , By : Lord Gaulo
How to disable highlightning of whitespace when editing Go source files in Vim?
will be helpful for those in need It's not highlighting nor any plugin. It's syntax coloring for so-called "whitespace errors" — trailing whitespace that shouldn't be there. It's coming from the built-in syntax/go.vim.You can customize the highlighti
TAG :linux
Date : September 23 2020, 07:00 AM , By : Faizan Khalid
How to use `waitpid` to wait for a process in Rust?
seems to work fine This has nothing to do with waitpid and everything to do with fork. When you fork a process, the OS creates a copy of your data and the child operates on this copy 1. When the child exits, its memory is discarded. The parent never
TAG :linux
Date : September 23 2020, 06:00 AM , By : emosoft
Grep command with multiple patterns
To fix the issue you can do To include multiple pattern to grep command you need option "-e". For example you can include pattern "pattern1" e "pattern2" in this way:
TAG :linux
Date : September 23 2020, 05:00 AM , By : Leo PG
Append file A.txt to file B.txt located in all subdirectories in linux command line
To fix the issue you can do How to go through all files in the current directory and append file A.txt to file B.txt by Linux command line? File A.txt is located in the current directory. File B.txt is located multiple times in all subdirectories in
TAG :linux
Date : September 23 2020, 03:00 AM , By : Annette Jonson
Buildroot tools - adding a user libs from .RPM
will be helpful for those in need Having the source code for a package stored in a .rpm file is quite uncommon. Buildroot has built-in rules to extract all the most common formats. Using an uncommon format requires you to write extraction rules on yo
TAG :linux
Date : September 22 2020, 04:00 AM , By : Rajiv Riddle
Merge multiple files to a single file including unmatched lines in shell
will be helpful for those in need You may use this gnu awk to combine multiple files with same key as first column value:
TAG :linux
Date : September 22 2020, 02:00 AM , By : Gamal al-qutub
Is there a way to get the internal limits for the number of events for io_setup() call on Linux?
I think the issue was by ths following , That case is hardcoded in the kernel source, in fs/aio.c. And, it's pretty big!
TAG :linux
Date : September 21 2020, 04:00 PM , By : ChengWiLL
Does anyone know how to "fake" download using CURL?
I think the issue was by ths following , issue HTTP HEAD requests and only download the headers so you can check if it returns "HTTP 404 Not Found" or something else, you can do that with curl using the -I parameter, but with large lists, you shouldn
TAG :linux
Date : September 21 2020, 10:00 AM , By : Gelnn
Test if ALL The Contents of One File exist in a Second File
With these it helps I have found a few examples on stackoveflow on how to do this but none of them work for me. , I would use perl's index for this:
TAG :linux
Date : September 21 2020, 10:00 AM , By : Abraham SN
Use Sed to replace next line but keep the white space
help you fix your problem Using a proper xml parser :
TAG :linux
Date : September 21 2020, 05:00 AM , By : Kiran Sawant
How to proxy over ssh?
it helps some times I have vps server where I have access to api.telegram.org, but on my local machine I could not get it. , This might help
TAG :linux
Date : September 20 2020, 10:00 PM , By : ankit
Understanding the following x86 assembly code
To fix the issue you can do This is NASM syntax assembly. You can assemble it with nasm -felf64 (or nasm -felf32 if you want) and disassemble the resulting .o with objdump -drwC -Mintel and see that the call jumps to the add.The call target for call
TAG :linux
Date : September 20 2020, 05:00 PM , By : Mahmoud Alshrbiny
Why Use a Remote Linux Desktop for Development?
With these it helps Few of the reasons I can think of Security : So that the production code which your company owns does not reside in your laptop. Safety : The Linux OS you ssh'ed into is probably running on a server with all kinds of redundancy an
TAG :linux
Date : September 20 2020, 08:00 AM , By : Kieran Gordon
command not found when adding sudo before my command
With these it helps When you use sudo, you are running the command as root user/super user. The root user doesn't have /usr/local/bin/ in PATH variable in your case. That is why you are able to run the command using full path. If you want to verify t
TAG :linux
Date : September 20 2020, 06:00 AM , By : Dheepak Rajendran
How to extract value from json contained in a variable using jq in bash
it should still fix some issue I am writing a bash script which has a json value stored in a variable now i want to extract the values in that json using Jq. The code used is. , You may use this:
TAG :linux
Date : September 20 2020, 04:00 AM , By : Swapnil Pandit
Is there any way to create a ".exe" in linux?
it fixes the issue If your friends are just casual users, then you can use something like shc (shell script compiler). However, it's possible for skilled enough users to decompile anything that their computer can run, so you shouldn't rely on this fo
TAG :linux
Date : September 20 2020, 03:00 AM , By : ann99
How to uninstall git on Linux which is installed from source
Hope that helps You don't need to uninstall it, you can just unpack new version, build it and install to the same place.But in case you still need to uninstall it, you can run make uninstall (if folder with source code is still available) or just rem
TAG :linux
Date : September 20 2020, 01:00 AM , By : Jens
extract only url segment not the below regular expression in shell script?
To fix this issue My logic goes here, , Try following in awk:
TAG :linux
Date : September 20 2020, 01:00 AM , By : linnil1
How to get the list of files (ls command) from bz2 archive?
I wish this helpful for you First bzip2, gzip, etc compress only one file. So probably you have compressed tar file. To list the files you need command like:
TAG :linux
Date : September 19 2020, 11:00 PM , By : Zhang Junhao
Automatic bash script interaction
Hope that helps This is where you would want to use a bash Coprocess (introduced in bash v4.0 -- NEWS)Suppose we have a file that contains the questions and answers:
TAG :linux
Date : September 19 2020, 11:00 PM , By : Volkan Orhan
Add new line after every period in txt file in terminal
wish helps you I've done some research online and cant find a solution to my problem. , Perl is (still) very handy for this kind of text manipulation:
TAG :linux
Date : September 19 2020, 11:00 PM , By : abhijeetpatra
Is it possible to intercept unencrypted HTTPS request body of local programs?
may help you . As you mention and as others confirmed, the data is encrypted in user space before the packets are passed to the kernel, so you cannot examine the unencrypted data when working on packets with eBPF (or indeed, you would need to do some
TAG :linux
Date : September 19 2020, 10:00 PM , By : Austin
Awk: parse node names out of "40*r13n15:40*r10n61:40*r11n18:40*r09n15"
I wish did fix the issue. I have a linux script for selecting the node. , One more awk:
TAG :linux
Date : September 19 2020, 09:00 PM , By : Isabel Costa
How do I permanently enable terminal output to a file?
Any of those help One way is to run script and do everything you want logged in its session.Pay attention to the caveats in the notes, though; tui programs don't play well, don't use in a pipeline or shell script, etc.
TAG :linux
Date : September 19 2020, 05:00 PM , By : molub
Is there any way for setting the logfile via redis-cli but not editing the redis.config file?
this will help You cannot change the logfile using CONFIG SET. You can change other config settings, including loglevel, but not logfile as it is currently unsupported.You can use CONFIG GET logfile to see the current setting value. If empty, it is g
TAG :linux
Date : September 18 2020, 04:00 PM , By : Francis Guérin
How do I make multi-arch Docker images?
I wish this help you I know other companies create images to support multiple architectures, how are they doing this?
TAG :linux
Date : September 18 2020, 09:00 AM , By : Shabab Huq
How to store output for every xargs instance separately
will help you cat domains.txt | xargs -P10 -I % ffuf -u %/FUZZ -w wordlist.txt -o output.json , Sure. Just name your output file using the domain. E.g.:
TAG :linux
Date : September 18 2020, 08:00 AM , By : Martin Stevanovic
Using shell, how to skip to next element in a for loop?
like below fixes the issue Use break to achieve the "skip" feature you're talking about.For example
TAG :linux
Date : September 18 2020, 06:00 AM , By : DFinn
Adding to mutiple string a space at the end
seems to work fine You can do so with sed quite easily with a couple of capture groups and a couple of backreferences along with \U (for uppercase) and \L (for lowercase), e.g.
TAG :linux
Date : September 17 2020, 10:00 AM , By : mashiro
shell script to moving files from one server to another server using sftp
may help you . Use scp.
TAG :linux
Date : September 17 2020, 10:00 AM , By : g stevens
How does the Linux Operating System understand the underlying hardware?
wish helps you I think at first you need to find out how the memory mapping works. What is the address space and how it relates to physical memory. Then you could read about how the hardware is mapped in address space and how to access it. It is a bi
TAG :linux
Date : September 16 2020, 02:00 PM , By : Kylie Flaskos
Kill -2 or Kill -INT ,how does it kill process
it fixes the issue Kill -2 sends an interrupt (2 is the value associated with SIGINT). This will wake up the sleep call but then the loop continues. If you send a 15 (SIGTERM), the process should terminate.
TAG :linux
Date : September 15 2020, 07:00 AM , By : hyungmo1004
Which assembly is used by Linux Kernel? Is it really NASM?
I think the issue was by ths following , The Linux kernel uses the GAS assembler(GNU Assembler) which is part of GCC. You can find reference documentation on it here. You can find a pretty thorough introduction to GAS here provided that you already h
TAG :linux
Date : September 14 2020, 09:00 PM , By : 张亚飞
how to grep a string from a particular line?
I wish this helpful for you I want to search for a String by navigating to a particular line, How to do this in shell scripting? , Try stringing together cat, sed, and grep.
TAG :linux
Date : September 14 2020, 10:00 AM , By : shyamsundar dara
Line:54 What is the purpose two awk statements provided after grep chainID
seems to work fine awk 1: split string by space character, print column 2.awk 2: split result of awk 1 by comma, print column 1.
TAG :linux
Date : September 14 2020, 02:00 AM , By : chunix zyc
How to set up envoirment variables for a perl script in crontab properly? Script is executing with workarounds
I wish this help you LD_LIBRARY_PATH needs to be set before the program (perl) starts.
TAG :linux
Date : September 14 2020, 12:00 AM , By : Colton Threatt
can not set linux environment variables as I expect
may help you . It's not going to work because each program inherits environment, that is a list of environment variables and their values from their parent process. Environment is not automatically propagated to all other programs on the system but i
TAG :linux
Date : September 13 2020, 08:00 AM , By : S. Shiraz
How to display ASCII characters from 0 to 127 in decimal, octal and hexadecimal format using linux bash script?
I hope this helps you . If your distro sources the man pages from the man-pages project you can use the following
TAG :linux
Date : September 12 2020, 06:00 PM , By : Matthew Wang
What is the difference between rpm -e and 'yum remove'?
hop of those help? rpm -e removes a packageyum remove removes a package and also packages which depend on it
TAG :linux
Date : September 12 2020, 05:00 PM , By : Aidan Houston
How to set memory limit for OOM Killer for chrome?
seems to work fine , This error message...
TAG :linux
Date : September 11 2020, 06:00 PM , By : yu yu
Bash - Getting the directory of user input
this one helps. As KamilCuk pointed out, when executing the read command, it should put the supplied value into the r1 variable. This is done without the $. So:
TAG :linux
Date : September 11 2020, 01:00 PM , By : Sive
Setting root-only permissions on /dev files and build binary
I wish did fix the issue. As part of a build process, I want to run the following two commands: , You can build a simple C program to use in place of the shell script:
TAG :linux
Date : September 10 2020, 11:00 AM , By : Anshul Sharma
Sending user-mode interrupts on x86
This might help you All kernel timer interfaces work by delivering signals to user-space processes, after handling the timer interrupt inside the kernel (or otherwise noticing that or waiting until the deadline has been reached).There are many big ob
TAG :linux
Date : September 10 2020, 11:00 AM , By : Shreekant
How to fix regex to match the whole word, and not a substring?
With these it helps In Addition to the Answer of virolino:The Regex Metacharacter \b matches word boundaries, i.e. between two characters, where one is a word character and the other is not is a word character, plus the start and the end of the strin
TAG :linux
Date : September 09 2020, 09:00 AM , By : Sai Sundari
C++ portability from Windows to Linux
Hope this helps That return 4321; in main reports an unsuccessful return code to the OS. Only 0 return code (aka EXIT_SUCCESS) is considered successful.Change it to return 0 or completely remove that return statement (in C++ main has implicit return
TAG :linux
Date : September 06 2020, 11:00 AM , By : ashish kadam
MarkLogic Filesystem Log entry
hope this fix your issue The meaning of "slow messages" is that a background activity takes longer time than expected. It is an indicator of starvation.From your question it's impossible to say what is causing it. Typically, it's related to underlyin
TAG :linux
Date : September 05 2020, 03:00 PM , By : Satyendra Maurya
Grep search +specific lines
wish of those help I have to parse a very large file and I want to use the command grep (or any other tool). , The options are -A for lines after, and -B for lines before.
TAG :linux
Date : September 05 2020, 11:00 AM , By : user6098519
ssh bash script issues with if statement
Hope this helps Im trying to learn how to write bash scripts. I have this script to update my servers through ssh. Im trying to add a check and a conditional to determine if the OS uses yum or apt then it will run the appropriate update commands. The
TAG :linux
Date : August 31 2020, 02:00 AM , By : Philip Choo
Network is unreachable when I clone my bitbucket repo in private AWS instance
I wish did fix the issue. Are you able to clone git repos from other servers, if yes, then it can be because of Security Group rule between the instance and Git is not in place or the Firewalld service running at the OS levelYou can use telnet comman
TAG :linux
Date : August 27 2020, 05:00 PM , By : K.Wang
How to get the CPU MHz (in /proc/cpuinfo) by the syscall?
will help you No, there is no syscall that will tell you the current speed (MHz) of your CPU. If you want to know the value without writing a kernel module for it, you can read the /proc/cpuinfo file, which is there exactly for this purpose (making t
TAG :linux
Date : August 25 2020, 04:00 PM , By : Root Lee
(beginner) How can I optimize this script?
To fix the issue you can do So I'm really new to this and lack any formal education, I've just been teaching myself as a hobby so I don't have an understanding of what I'm trying to accomplish or the terminology to look up the answer on my room. Allo
TAG :linux
Date : August 25 2020, 02:00 PM , By : Valentina Di noi
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