Recent questions tagged Linux

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linux - Bash `wait` command, waiting for more than 1 PID to finish execution

I recently posted a question asking if it was possible to prevent PID's from being re-used. So far the answer appears ... PID="$!" PIDS+=($PID) 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 - Python subprocess.Popen erroring with OSError: [Errno 12] Cannot allocate memory after period of time

Note: This question has been re-asked with a summary of all debugging attempts here. I have a Python script that ... () starting at line 520. 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 - Multiple instances of Python running simultaneously limited to 35

I am running a Python 3.6 script as multiple separate processes on different processors of a parallel computing ... more than 35 processes? 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 - How do I point a docker image to my .m2 directory for running maven in docker on a mac?

When you look at the Dockerfile for a maven build it contains the line: VOLUME /root/.m2 Now this would be great ... maven in docker on a mac? See Question&Answers more detail:os...

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

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761 views

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linux kernel - $(uname -a) returning the same in docker host or any docker container

Why $(uname -a) returns the same Linux kernel than the host machine inside a docker container? uname -a #=> ... ) and should have kernel 3.19 See Question&Answers more detail:os...

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

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684 views

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linux - undefined reference to symbol even when nm indicates that this symbol is present in the shared library

What could be wrong here? I have the following simple class: #include "libmnl/libmnl.h" int main() { struct ... libmnl.so", O_RDONLY) = 7 See Question&Answers more detail:os...

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

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661 views

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linux - Sort files numerically in bash

I need to sort .flv files numerically and i was able to do it with the following command: ls *.flv | sort --version- ... -f ls *.flv | sort -f See Question&Answers more detail:os...

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

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677 views

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linux - Get link speed programmatically?

I am writing an application that reports attributes of network devices on the local machine. I need the mac ... with udev or another library? 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 - Error while using a newer version of glibc

I am trying to install tensorflow on a linux server where I am just a user without the root permission. And ... good enough solution for this. See Question&Answers more detail:os...

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

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834 views

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linux - How to stop ffmpeg remotely?

I'm running ffmpeg on another machine for screen capture. I'd like to be able to stop it recording ... of remotely stopping ffmpeg cleanly. See Question&Answers more detail:os...

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

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524 views

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linux - Difference between using java.library.path and LD_LIBRARY_PATH

Is there a difference between setting the JVM argument -Djava.library.path=/path at JVM start and setting the ... of the two approaches? See Question&Answers more detail:os...

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

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551 views

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linux - What is file globbing?

I was just wondering what is file globbing? I have never heard of it before and I couldn't find a definition when I tried looking for it online. See Question&Answers more detail:os...

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

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451 views

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linux - How to reverse a list of words in a shell string?

I have a list of words in a string: str="SaaaaE SeeeeE SbbbbE SffffE SccccE" I want to reverse it in order to ... How I can do that with ash? See Question&Answers more detail:os...

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

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522 views

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linux - Gsettings with cron

I wrote a bash script that changes the wallpaper (for GNOME3). #!/bin/bash # Wallpaper's directory. ... error: X11 initialization failed. See Question&Answers more detail:os...

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

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611 views

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linux - Delete all files except the newest 3 in bash script

Question: How do you delete all files in a directory except the newest 3? Finding the newest 3 files is simple ... and bash scripts for this. See Question&Answers more detail:os...

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

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504 views

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linux - How to feed mysql queries from bash

I'm trying to make a bash script that creates a mysql user and database but I can't find a way to feed ... How to feed mysql with the queries? See Question&Answers more detail:os...

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

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1.1k views

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linux - sed: -i may not be used with stdin on Mac OS X

I am using a bison parser in my project. When I run the following command: sed -i y.tab.c -e "s/ ... not sure why. Can anyone help? 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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535 views

1 answer

linux - How to read just a single character in shell script

I want similar option like getche() in C. How can I read just a single character input from command line? Using read command can we 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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778 views

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linux - How do I increase the /proc/pid/cmdline 4096 byte limit?

For my Java apps with very long classpaths, I cannot see the main class specified near the end of the arg ... How can I increase this limit? 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 - Explaining the 'find -mtime' command

I'm trying to remove all the dateed logs except the most recent. Before I execute a script to remove the files, ... ./testfile.2014-08-29.log See Question&Answers more detail:os...

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

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1.0k views

1 answer

linux - how do you specify non-capturing groups in sed?

is it possible to specify non-capturing groups in sed? if so, how? See Question&Answers more detail:os...

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

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955 views

1 answer

linux - Embed ICC color profile in PDF

I am generating a PDF where all the graphics are drawn in DeviceRGB in the sRGB color space. I would like to convert ... version 9.10 and 9.16. See Question&Answers more detail:os...

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

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569 views

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linux - How to check FIPS 140-2 support in OpenSSL?

We have a client which is asking about OpenSSL FIPS (Federal Information Processing Standard) 140-2 compliant support ... OS: Redhat 5 Linux See Question&Answers more detail:os...

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

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542 views

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linux - Why are core dump files generated?

Sometimes when I run my code, a core dump file is generated when I terminate the program by Ctrl+. The file ... use for the core dumped file? See Question&Answers more detail:os...

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

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538 views

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linux - Creating permanent executable aliases

I have MySQL installed (MAMP, Mac OS X) but need to call it by the full path each time I access it ... there a special syntax for this file? See Question&Answers more detail:os...

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

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604 views

1 answer

linux - How to force gcc to link unreferenced, static C++ objects from a library

I'm using a C++ library that can be built as either a shared or a static library. This library uses a ... could modify it, if that helps. See Question&Answers more detail:os...

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

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791 views

1 answer

linux - How can I forward localhost port on my container to localhost on my host?

I have a daemon on my host running on some port (i.e. 8008) and my code normally interacts with the daemon by ... :1:2009 :::* LISTEN 22547/ssh See Question&Answers more detail:os...

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

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923 views

1 answer

linux - "In-source builds are not allowed" in cmake

I'm new to cmake, and I'm only using it to install opencv on my ubuntu linux. Here's the command I ran: ... , but none of them worked. 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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