Recent questions tagged linux

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linux - How to dynamically load often re-generated c code quickly?

I want to be able to generate C code dynamically and re-load it quickly into my running C program. I am ... to reload the compiled code quickly. See Question&Answers more detail:os...

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

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674 views

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linux - Listing available devices in python-opencv

I have two webcams attached to my laptop (one built in), both of which work. (If I use Cheese, a webcam ... are /dev/videoN entries for both). See Question&Answers more detail:os...

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

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719 views

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linux - Anything like dos2unix for Windows?

I have some shell scripts created on windows I want to run dos2unix on them. But as I have read that dos2unix ... /CVS $ pwd /cygdrive/c/CVS See Question&Answers more detail:os...

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

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503 views

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linux - How to do memory test on Arm Architecture Hardware? (something like Memtest86)

Is there a way to do complete memory test on android device RAM? I'm developing a driver but at ramdom times ... ram on my device are corrupted. See Question&Answers more detail:os...

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

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837 views

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linux - How can I trim white space from a variable in awk?

Suppose $2 is my variable. I have tried going from awk -F, '{print $2 ":"}' to awk -F, '{ ... printing something to printing nothing at all. See Question&Answers more detail:os...

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

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637 views

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linux - How to tell mex to link with the libstdc++.so.6 in /usr/lib instead of the one in the MATLAB directory?

Now mex in MATLAB 2012a only officially supports gcc 4.4.6 but I want to use gcc 4.7 at my own risk. Now If ... .so.6 that mex uses? Thank you. See Question&Answers more detail:os...

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

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linux - C++ Boost ASIO simple periodic timer?

I want a very simple periodic timer to call my code every 50ms. I could make a thread that sleeps ... Does boost provide this functionality? See Question&Answers more detail:os...

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

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486 views

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linux - Embed data in a C++ program

I've got a C++ program that uses SQLite. I want to store the SQL queries in a separate file -- a plain-text ... but it would take a lot longer.) See Question&Answers more detail:os...

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

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566 views

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linux - Search and replace with sed when dots and underscores are present

How do I replace foo. with foo_ with sed simply running sed 's/foo./foo_/g' file.php doesn't work. Thanks! See Question&Answers more detail:os...

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

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579 views

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linux - How do I pass a wildcard parameter to a bash file

I'm trying to write a bash script that allows the user to pass a directory path using wildcards. For example, ... in $dirs do echo $dir done See Question&Answers more detail:os...

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

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596 views

1 answer

linux - Install Mono and Monodevelop on CentOS 5.x/6.x

I am trying to install Mono and Monodevelop on a CentOS 5.9 environment. I have tried the following instructions, ... to the the above link. See Question&Answers more detail:os...

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

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841 views

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linux bash, camel case string to separate by dash

Is there a way to convert something like this: MyDirectoryFileLine to my-directory-file-line I found some ways to ... in that way; any ideas? See Question&Answers more detail:os...

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

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623 views

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linux - Grep inside all files created within date range

I am on the Ubuntu OS. I want to grep a word (say XYZ) inside all log files which are created within date range ... may-2012. How do I do that? See Question&Answers more detail:os...

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

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874 views

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linux - Pthread Mutex lock unlock by different threads

A Naive question .. I read before saying - "A MUTEX has to be unlocked only by the thread that locked it." But ... failed: %d ", rc2); } See Question&Answers more detail:os...

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

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533 views

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linux - Getting cpu cycles using RDTSC - why does the value of RDTSC always increase?

I want to get the CPU cycles at a specific point. I use this function at that point: static __inline__ ... I using the functions incorrectly? See Question&Answers more detail:os...

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

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541 views

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linux - Signal queuing in C

I have a simple program under Linux which sends SIGUSR1 signal to its child process in a cycle. But when I send ... can send signals in a queue? See Question&Answers more detail:os...

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

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410 views

1 answer

linux - c++ how to use select to see if a socket has closed

Can someone provide me an example of how to use select() to see if a client has closed the connection on a socket? FYI. I'm using linux. Thanks! See Question&Answers more detail:os...

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

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688 views

1 answer

linux - Sort logs by date field in bash

let's have 126 Mar 8 07:45:09 nod1 /sbin/ccccilio[12712]: INFO: sadasdasdas 2 Mar 9 08:16:22 nod1 / ... time key. Thank you very much. Martin See Question&Answers more detail:os...

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

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439 views

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linux - Joining multiple fields in text files on Unix

How can I do it? File1 looks like this: foo 1 scaf 3 bar 2 scaf 3.3 File2 looks like this: foo 1 scaf 4.5 ... same. Is there a way to do it? See Question&Answers more detail:os...

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

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686 views

1 answer

linux - How do I determine if a detached pthread is alive?

How do I determine if a detached pthread is still alive ? I have a communication channel with the thread ... for thread liveliness somehow? See Question&Answers more detail:os...

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

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625 views

1 answer

linux - Running a self-contained ASP.NET Core application on Ubuntu

I've published an ASP.NET Core application as a self-contained application targeting Ubuntu. The publish seems to ... files I'm copying over: See Question&Answers more detail:os...

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

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509 views

1 answer

linux - Running a self-contained ASP.NET Core application on Ubuntu

I've published an ASP.NET Core application as a self-contained application targeting Ubuntu. The publish seems to ... files I'm copying over: See Question&Answers more detail:os...

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

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397 views

1 answer

linux - Secure way to run other people code (sandbox) on my server?

I want to make a web service that runs other people's code locally. Naturally, I want to limit their code's ... codes written in Java & C++ See Question&Answers more detail:os...

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

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545 views

1 answer

linux - How to check if sed has changed a file

I am trying to find a clever way to figure out if the file passed to sed has been altered successfully or not. ... able to use some hacks here. See Question&Answers more detail:os...

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

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500 views

1 answer

linux - How to get hard disk serial number using Python

How can I get the serial number of a hard disk drive using Python on Linux? I would like to use a ... hdparm. Perhaps using the fcntl module? See Question&Answers more detail:os...

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

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688 views

1 answer

linux - What is the proper way to use inotify?

I want to use the inotify mechanism on Linux. I want my application to know when a file aaa was changed. Can you ... a sample how to do that? See Question&Answers more detail:os...

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

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579 views

1 answer

linux - /dev/random Extremely Slow?

Some background info: I was looking to run a script on a Red Hat server to read some data from /dev/random ... I learned something new today. :) See Question&Answers more detail:os...

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

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592 views

1 answer

linux - Pass a password to ssh in pure bash

I want to pass a password to ssh using a bash script (Yes, I know that there are ssh keys that I could ... then sending a string directly to it? See Question&Answers more detail:os...

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

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