Recent questions tagged Linux

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I have an EC2 instance running and I am able to SSH into it. However, when I try to rsync, it gives me ... amazonaws.com:/var/www/html/ Thanks, See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to use sed to extract substring

I have a file containing the following lines: <parameter name="PortMappingEnabled" access="readWrite" type="xsd: ... could be this command? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to clear the line number in Vim when copying?

I copy some code from one part of one file to another part in vim, I find that, there are line numbers in ... 67 41 passenger_enabled on; 68 42 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How do I extract a single chunk of bytes from within a file?

On a Linux desktop (RHEL4) I want to extract a range of bytes (typically less than 1000) from within a large ... < input.binary > output.binary See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Which program creates a C array given any file?

I remember seeing in the past a program that would take any file and generate a C array representing that file ... Unix/Linux program does that? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Is there an equivalent to COM on *nix systems ? If not, what was the *nix approach to re-usability?

I have an understanding of windows COM and the ideas behind it. I am trying to understand if *nix systems even ... equivalent or why they don't? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to runtime debug shared libraries?

Can anyone tell me how to do runtime debugging on shared libraries? I need to runtime-debug a function in my shared ... what I m trying to do?. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - What is a sysroot exactly and how do I create one ?

I'm working with QT and embedded devices and in many documentation items ( like here) they are talking about sysroots. ... how do I create one ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - cross compiler ldd

I have created a cross compiled arm executable. I want to find the library dependency of the executable. I ... library dependancy in linux. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to read a .properties file which contains keys that have a period character using Shell script

I am trying to read a properties file from a shell script which contains a period (.) character like below: # ... or somewhere in /usr/share/doc See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - How to upgrade AWS CLI to the latest version?

I recently noticed that I am running an old version of AWS CLI that is lacking some functionality I need: $aws -- ... 3 Linux/3.13.0-85-generic See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Error: gdal-config not found while installing R dependent packages whereas gdal is installed

Please point out the point that I am missing: openSUSE 11.3 xx@linux-y3pi:~/Desktop/R> sudo R CMD INSTALL ... games: No such file or directory See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Create a daemon with double-fork in Ruby

What is the proper way to create a well-behaved Unix or Linux daemon in Ruby? What is the definition of a ... write such a program in Ruby? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Control mouse by writing to /dev/input/mice

I am using Ubuntu 12.04. For one of my applications I require to control the mouse in software using a script. I ... than a C/C++ solution. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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467 views

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linux - Git enter long passphrase for every push

Every time I try to push anything to GitHub it asks me the address [email protected]:... and after that it wants ... this? I am using Linux Ubuntu. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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468 views

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linux - Convert all file extensions to lower-case

I'm trying to lower-case all my extensions regardless of what it is. So far, from what I've seen, you have to ... . How can I do that in bash? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - What is preemption / What is a preemtible kernel? What is it good for?

Explained in your own words, what is preemption and what does it mean to a (linux) kernel? What are ... in having a preemptible kernel? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Using grep to search for a string that has a dot in it

I am trying to search for a string 0.49 (with dot) using the command grep -r "0.49" * But what happening is ... get the result only for "0.49". See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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393 views

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linux - Measuring the runtime of a C++ code?

I want to measure the runtime of my C++ code. Executing my code takes about 12 hours and I want to write ... in my code? Operating system: Linux See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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843 views

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linux - what does "bash:no job control in this shell” mean?

I think it's related to the parent process creating new subprocess and does not have tty. Can anyone explain the ... in this shell come from. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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508 views

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linux - cmd 2>&1 > log vs cmd > log 2>&1

What is the difference between: cmd > log 2>&1 and cmd 2>&1 > log where cmd is a command? Which should I prefer and why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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614 views

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linux - export not working in my shell script

I have two scripts 1.sh and 2.sh. 1.sh is as follows: #!/bin/sh variable="thisisit" export variable ... somebody please help. Thanks in advance. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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639 views

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linux - what is RAW socket in socket programming

When I gone through socket programming I could not clearly understand RAW_SOCKET. My understanding is If I open a ... some explain me. ThankYou See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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520 views

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linux kernel - Who calls the probe() of driver

How does probe() call gets called? Who calls it? As per my understanding, __init() registers driver and then ... to track where it gets filled. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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linux - Android - Command not found

I am trying to run the command in ubuntu android update project --path . However I am getting a android:command not ... I need to point it too. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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591 views

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linux - Attaching and mounting existing EBS volume to EC2 instance filesystem issue

I had some unknown issue with my old EC2 instance so that I can't ssh into it anymore. Therefore I'm ... volume at all. Thanks in advance! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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484 views

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linux - How can I split one text file into multiple *.txt files?

I got a text file file.txt (12 MB) containing: something1 something2 something3 something4 (...) Is there a way ... file3.txt, file4.txt, etc.? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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464 views

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linux - Read line by line in Bash script

I want to do the following: Read a file line by line and use the line as a parameter. FILE="cat test" echo ... $CMD, it just prints cat test. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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