LINUX QUESTIONS

How do I setup Public-Key Authentication?

Hope that helps How do I setup Public-Key Authentication for SSH? , If you have SSH installed, you should be able to run..

TAG : linux

Date : January 24 2021, 02:01 AM , By : Mark

How to show a GUI message box from a bash script in linux?

Any of those help I believe Zenity will do what you want. It's specifically designed for displaying GTK dialogs from the command line, and it's available as an Ubuntu package.

TAG : linux

Date : January 24 2021, 02:01 AM , By : Senthil

Mapping my custom keys in Debian

Hope that helps I can't say for certain because I'm not using Debian but if you're using Gnome the easiest way is to run gnome-keybinding-properties (System > Preferences > Keyboard Shortcuts)Instead of typing a shortcut such as Ctrl+M, hit the butto

TAG : linux

Date : January 24 2021, 02:01 AM , By : Thaweesak Suksuwan

How do you kill all Linux processes that are older than a certain age?

it helps some times I have a problem with some zombie-like processes on a certain server that need to be killed every now and then. How can I best identify the ones that have run for longer than an hour or so? , If they just need to be killed:

TAG : linux

Date : January 23 2021, 02:43 AM , By : Kristian Hofslaeter

Securing a linux webserver for public access

I wish this helpful for you This article has some of the best ways to lock things down:http://www.petefreitag.com/item/505.cfm

TAG : linux

Date : January 22 2021, 07:05 PM , By : Andrew L.

Text Editor For Linux (Besides Vi)?

I hope this helps . Emacs is a wonderful text editor. It has huge power once you become a power user. You can access a shell, have as many files open as you want in as many sub-windows and an extremely powerful scripting support that lets you add all

TAG : linux

Date : January 22 2021, 02:12 PM , By : dbarbot

Shell scripting input redirection oddities

it helps some times A recent addition to bash is the lastpipe option, which allows the last command in a pipeline to run in the current shell, not a subshell, when job control is deactivated.

TAG : linux

Date : January 22 2021, 02:12 PM , By : Francesco

Replace each column with different spacing using sed

this will help sed uses POSIX Basic Regular Expressions, which are, like the name suggests, very basic, without a lot of the syntactical sugar or features of other RE packages you might be more used to. But they can still handle this:

TAG : linux

Date : January 12 2021, 09:11 PM , By : pad

How to fix Tcl 'Command not found' error while trying to puts error variable?

fixed the issue. Will look into that further I am trying to execute an 'expect script' abc from another expect script xyz and capture its output in a $result variable. abc in turn executes an AppleScript whose output is something that is echo'd. In a

TAG : linux

Date : January 12 2021, 09:11 PM , By : user119413

How to find all files on a *NIX server containing a certain string

around this issue grep can recurse on a given directory if you use the -r or -R flag. The second one will follow all symbolic links. The rgrep is a shortcut for grep -r.

TAG : linux

Date : January 12 2021, 08:33 AM , By : George H.

How to replace the third comma in a csv file with a space in linux using bash?

wish helps you The sed s command has a flag to specify which occurrence of a regex to apply the command to:

TAG : linux

Date : January 12 2021, 08:33 AM , By : user176691

Using sed to replace a pattern by symbol

wish help you to fix your issue How do I replace a pattern by looking at sentence symbol by using sed? , This should do:

TAG : linux

Date : January 11 2021, 03:34 PM , By : user171555

Is there a way to "escape" linux commands?

I wish this help you You can run an external command without a shell (and therefore without issues with shell metacharacters) using child_process.spawn (or other methods in child_process). (Obviously, you must not specify the shell option as anything

TAG : linux

Date : January 11 2021, 03:34 PM , By : alchemist

ImageMagick V7 and Trimming Tool for Multiple Images

hope this fix your issue Your command works fine for me on IM 7.0.8.60 Q16 Mac OSX. This is what I did to test it.

TAG : linux

Date : January 11 2021, 03:32 PM , By : Sascha Brossmann

ImageMagick V7 and Cropping Tool

this one helps. It works OK for me but your dimensions are a bit off - for the result I think you wanted.Note V7 uses magick and not convert; convert uses a V6 legacy version.

TAG : linux

Date : January 11 2021, 03:28 PM , By : ziqew

Using bash, awk or sed to templatize a CSV file into a SQL file

may help you . I will have a CSV file (say, ids.csv) that I need to ETL into a SQL script (say, update_products.sql). The CSV will be headerless and will consist of comma-delimited numbers (product IDs in a database), for instance: , I'd probably sta

TAG : linux

Date : January 11 2021, 03:28 PM , By : user184415

Tomcat is not loading on browser after deploying geoserver WAR - Ubuntu

wish help you to fix your issue This problem occurred due to some permission issues. sudo chown -R user:user /var/lib/tomcat8.In order to deploy any web apps on tomcat8 the tomcat itself should be the owner. By changing the directory permission to to

TAG : linux

Date : January 11 2021, 11:39 AM , By : nabbed

Killing subprocess from inside a Docker container kills the entire container

hope this fix your issue You can use process manager like "supervisord" and configure it to re-execute your script or the command even if you killed it's process which will keep your container up and running.

TAG : linux

Date : January 10 2021, 02:06 PM , By : paolodm

Embedded Linux for total beginner

Hope that helps Depending on the device you plan on using, you may be able to emulate it using QUEMU.Even without a device, you could probably get started by reading through some of the articles on http://www.linuxfordevices.com.

TAG : linux

Date : January 10 2021, 01:57 PM , By : Tamizhvendan

Question about Modal Dialog in Gtk application

I wish this helpful for you The alert window of firefox is modal. When you open a new window in firefox, it spawns another firefox process so you have two processes, two windows, two independent main loops.

TAG : linux

Date : January 10 2021, 01:57 PM , By : nd27182

Can I user kernel-level thread in Linux kernel v2.6 and is there any way to know thread-level of my thread?

Any of those help PTHREAD_SCOPE_PROCESS is not supported on Linux, but the pthread scope has nothing to do with whether you get a kernel-level thread or not.The modern Linux implementation of pthreads uses a 1:1 mapping between pthread threads and ke

TAG : linux

Date : January 10 2021, 01:57 PM , By : DonMac

linux kernel booting from my bootloader

hop of those help? Are you sure you need to write your own bootloader ?You don't call start_kernel. You don't call any function by the way. What you need is to read the kernel image into memory, put some information like the commandline into memory,

TAG : linux

Date : January 10 2021, 01:45 PM , By : rhinojosa

How to create a hex dump of file containing only the hex characters without spaces in bash?

will be helpful for those in need How do I create an unmodified hex dump of a binary file in Linux using bash? The od and hexdump commands both insert spaces in the dump and this is not ideal. , xxd -p fileOr if you want it all on a single line:

TAG : linux

Date : January 10 2021, 01:45 PM , By : Thomas Gueze

Extract the file name of last slash from path

wish help you to fix your issue There are much elegant ways to achieve the objectve. The following use awk to achieve the objectiv:

TAG : linux

Date : January 08 2021, 10:52 AM , By : artifex

unable to remove a file - terminal is splitting file name into two

it helps some times You have a space between review_ and permission.sql.In order to rm the file you need to either add \ before the space:

TAG : linux

Date : January 07 2021, 03:08 PM , By : Picoman Games

listing files in UNIX owned by a particular user

This might help you How do I list the files owned by a particular user in UNIX ?. , It should be possible to use awk togheter with ls -l

TAG : linux

Date : January 07 2021, 03:08 PM , By : Murali Ravipudi

Which docker OS base image should I use?

it should still fix some issue Alpine Linux, because you can have advantages in cross-iaas, size, efficiency and security - one interesting point is that docker community are moving their images to be based on Alpine. Cross-IaaS: You can use it in ev

TAG : linux

Date : January 05 2021, 11:29 AM , By : user183676

Docker on Windows 2019 cannot switch to Linux OSType

This might help you So I was able to resolve this issue. I'm currently running a Linux container in Docker on a Windows 2019 server, yet the OSType still says Windows... I guess I shouldn't expect that value to ever change to Linux (on my local Windo

TAG : linux

Date : January 03 2021, 08:18 AM , By : joshski

How do I tail all files and exclude some files by wildcard name?

To fix the issue you can do Extended wildcards are not enabled by default, you need to use shopt to enable them.

TAG : linux

Date : January 03 2021, 08:18 AM , By : sgmichelsen

Bash script command to wait until docker-compose process has finished before moving on

this will help As already stated in the other answers you'll have to do an application-specific readiness-check for your container. Personally I prefer to provide these checks/scripts with the container image, e.g. by adding the wait-for-it.sh (see E

TAG : linux

Date : January 03 2021, 08:18 AM , By : TBG

Date values between two times for each day of the month

I think the issue was by ths following , The problem with your updated example code is that in the loop condition you are effectively only checking $END_DAY_SEVEN_AM_EPOCH_DATE not to be empty - which is just set two lines above, therefore the loop b

TAG : linux

Date : January 02 2021, 10:54 PM , By : Thomas Gueze

Socket programming issue ipv6+udp

fixed the issue. Will look into that further I wrote a code to generate ipv6+UDP packets, i am facing sendto() is throwing "sendto failed : Invalid argument", however with little modification, same code is working for ipv4+udp. can someone help me to

TAG : linux

Date : January 02 2021, 06:48 AM , By : Skee

How to combine multiple static libraries when the library name contains a space?

like below fixes the issue I don't know if it is possible to use file names with a space in a MRI script. You can rename or symlink the library file foo bar.a to a name without space as a simple workaround.If you don't insist on using a MRI script yo

TAG : linux

Date : January 02 2021, 06:48 AM , By : liquidx

Aliasing a command and using it in the same line of code

Hope this helps I think the command line is being parsed, and aliases applied, before anything is executed. However, you can do it with shell functions. I don't have PHP, but I have several Perl versions to test with:

TAG : linux

Date : January 02 2021, 06:48 AM , By : mtnmuncher

Open iTerm2 from bash script & Run commands

should help you out Summary , Hope It helps you. You may use the command iTerm2 instead of iTerm.

TAG : linux

Date : January 02 2021, 06:48 AM , By : user182203

How to prevent others for read /write on the file, while it is writing

this will help The flock file locking mechanism in Perl is advisory. It can be used to exclude other processes from accessing a file if those other processes are also using flock. Even this mechanism will be flaky with some systems (I'm looking at yo

TAG : linux

Date : January 02 2021, 06:48 AM , By : user184975

Crontab error: "/tmp/crontab.calJpk":5: bad day-of-month

Any of those help You just have too many arguments in there. Read man -s5 crontab for more info. The fields are:

TAG : linux

Date : January 02 2021, 06:48 AM , By : davidg

Getting syntax error using awk in parallel processing

should help you out @DudiBoy has a good solution. But to me it is annoying that I have to make another file just because I want to call GNU Parallel. So you can also use functions. This way you do not need to make a new file:

TAG : linux

Date : January 02 2021, 06:48 AM , By : Mforg

cURL Bash save response body to file

may help you . Simply remove the control operator that forces your commands to be ran in the background and asynchronously of your own script control flow.This will cause your save_log() function to be called with no arguments (because they we're in

TAG : linux

Date : January 02 2021, 06:48 AM , By : Eugenio

The most clear and concise way to describe SSH commands in .gitlab-ci.yml

help you fix your problem Keep your commands in a separate file remote.sh without set -x and :

TAG : linux

Date : January 02 2021, 06:48 AM , By : Terrence Poon

Read/write a big file randomly - mmap on every read/write?

like below fixes the issue Doing mmap(1) on every I/O doesn't sound like the right thing - It would confuse the code reader and possibly the kernel's optimizations, and has no benefit.You can use pread(1)/pwrite(1) or preadv(1)/pwritev(1) if you want

TAG : linux

Date : January 02 2021, 06:48 AM , By : Lior

Error while compiling for NodeMCU on Arduino IDE on Ubuntu

around this issue You either need to install Python, or fix(re-link) the file in the Arduino IDE pointing to the Python binary.Open a terminal (ctrl+alt+T), type python at the prompt, press enter:

TAG : linux

Date : January 02 2021, 06:48 AM , By : Alex Bartzas

How to save the response body from cURL in a file when executing the command in a loop in a bash script?

may help you . From the Curl documentation: -I, --head Show document info only Removing the -I or replace it with -i should solve your problem

TAG : linux

Date : January 02 2021, 06:48 AM , By : PatrickSimonHenk

why Linux system time adds and substracts one hour every 6 months?

Any of those help The date command with the %s format gives you the wall clock time in seconds from the epoch and your location has daylight savings time. So when you change to and from summer time you either gain or loose an hour.

TAG : linux

Date : January 02 2021, 06:48 AM , By : hyperNURb

How to exclude a specific file in scp linux shell command?

it should still fix some issue You can use rsync with the --exclude switch, e.g.

TAG : linux

Date : January 02 2021, 06:48 AM , By : B3CFT

How to wrap lines within columns in Linux

it should still fix some issue Let's pretend this is what your original script is doing given your posted sample input and the output you say you get:

TAG : linux

Date : January 02 2021, 06:48 AM , By : DonMac

How to store the output of a command that has already gone throgh pipeline

To fix this issue Use $(...) to capture a command's output. Don't put any space around the equal sign.

TAG : linux

Date : January 02 2021, 06:48 AM , By : Steve

How to remove a certain type of files and directories from git add before commit?

like below fixes the issue IF you have not committed yet, you can remove from the index any file you need with git reset or git rm --cached if you really want to not track them, which is the case here:

TAG : linux

Date : January 02 2021, 06:48 AM , By : glisignoli

How to check last modified date of a file in AIX using bash script?

around this issue If you can't find an appropriately specific utility, you can always fall back on perl:

TAG : linux

Date : January 02 2021, 06:48 AM , By : Paul

What does the shell "${i%,v}" mean in run-parts.sh?

may help you . The syntax ${var%pattern} just expands to the value of $var with the glob pattern matcing 'pattern' removed from the end of the string. So ${i%,v} is just $i with the trailing ,v removed. The only difference between ${i%%,v} and ${i%,v

TAG : linux

Date : January 02 2021, 06:48 AM , By : lamberms

cat displays multi-line file content in a single line

Any of those help In Linux Shell script, I am trying to trace each command status (either Success or Failure) in a log file.

TAG : linux

Date : January 02 2021, 06:48 AM , By : Arnaud Goudsmit

No module named 'tensorflow.python.platform'

To fix the issue you can do I am using python3 and have installed tensorflow-gpu using:

TAG : linux

Date : January 02 2021, 06:48 AM , By : kakashi_

"Hash #" symbol cause the string to be split

To fix this issue PAM interprets /etc/environment, not a shell. It's intended to be simple KEY=VALUE on each line with no need for quotes. marks a comment and there is no way to escape it. You can use /etc/profile to define your environment variable

TAG : linux

Date : January 02 2021, 06:48 AM , By : Shawazi

What are the possible list of Linux bash shell injection commands?

With these it helps Don't Use Blacklists. A blacklist of content that is explicitly disallowed in your data is just an invitation for someone to come up with a vulnerability that isn't on it, or to obfuscate their code so a regex can't match it, or t

TAG : linux

Date : January 02 2021, 06:48 AM , By : iyogee

curl is downloading the html rather than the actual zip file from gitlab

around this issue This could be an authentication problem as someone mentioned in the comments (and in that case you can for example pass your personal token in the header request).If your project is public you should be able to download the archive

TAG : linux

Date : January 02 2021, 06:48 AM , By : Dré

shell scripting "test " command

this will help I m writing shell program to compare two numbers and show the status using test command , You have to change line

TAG : linux

Date : January 02 2021, 06:48 AM , By : n800s

Socket incoming connections can not push_back elements concurrently to a globally defined std::vector

To fix this issue I am new in socket programming and at this moment I am confronted with a problem that I can not solve. I have read from several sources that the C++ standard template (STL) containers are not thread-safe, so that one as a programmer

TAG : linux

Date : January 02 2021, 06:48 AM , By : chorn

escaping complicated command line arguments in bash and ssh

it helps some times I am working on a bash script to retrieve uptime of a list of servers. It just reads from a file and executes a remote command on the server. Some servers may have been up for a long time while some may have just been rebooted. I

TAG : linux

Date : January 02 2021, 06:48 AM , By : iyogee

Filtering files with the given range of inputin perl

help you fix your problem It's easy enough to generate a list of the timestamps that you're interested in. In this code, I've used Time::Piece which has been part of the standard Perl distribution since version 5.10 in 2007.

TAG : linux

Date : January 02 2021, 06:48 AM , By : Longchao Dong

Save cat command output to file

I wish this help you here are three easy options (one two are the same as my comments above): you can use regex-based text substitution in an editor like vim to edit the file, i.e. open the file, type : and run the substitution %s/^.*^K//, where ^K

TAG : linux

Date : January 02 2021, 06:48 AM , By : sep