Recent questions tagged Linux

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linux - Get MAC address using shell script

Currently all the solution mentioned for getting the MAC address always use eth0. But what if instead of eth0 my ... on all the Linux flavours. 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 can I add a line to a file in a shell script?

I want to add a row of headers to an existing CSV file, editing in place. How can I do this? echo ' ... inserted at the beginning of the file. 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 - Hadoop: «ERROR : JAVA_HOME is not set»

I'm trying to install Hadoop on Ubuntu 11.10. I set the JAVA_HOME variable in the file conf/hadoop- ... JAVA_HOME variable not set correctly? 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 - Why does "docker attach" hang?

I can run an ubuntu container successfully: # docker run -it -d ubuntu ... root@91262536f7c9:/# 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 - /bin/sh: pushd: not found

I am doing the following inside a make file pushd %dir_name% and i get the following error /bin/sh : pushd ... think that is causing a problem. See Question&Answers more detail:os...

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

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523 views

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linux - Exception in thread "main" java.lang.NoClassDefFoundError: HelloWorld

I've been working on this for about an hour and thumbing through Q&As on stackoverflow but I haven't found a ... 2011 i686 i686 i386 GNU/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 - Context switch in Interrupt handlers

Why can't a context switch happen when an interrupt handler is executing ? More specifically, in the linux ... to schedule another process ? 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 - Bluetooth Low Energy: Use BlueZ stack as a peripheral (with custom services and characteristics)

I am trying to use the BlueZ stack on a Linux machine to create a GATT server with custom services and ... something. Thank you 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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linux - How to start/stop a cronjob using PHP?

If I type crontab -l in the command-line I can see the following line: # * * * * * /usr/bin/ ... script, instead of manually editing the file. See Question&Answers more detail:os...

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

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612 views

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linux - Can't change tomcat 7 heap size

I have set the heap size of tomcat 7 by adding the following line in catalina.sh export CATALINA_OPTS=" ... .67644541750672% used please advise. See Question&Answers more detail:os...

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

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551 views

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linux - Implementing shell in C and need help handling input/output redirection

Round 2 After reading some of the answers, my revised code is: int pid = fork(); if (pid == -1) { perror( ... I am not sure what is going wrong. 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 send a html email with the bash command "sendmail"?

Anyone has a demo available? Sendmail is said to be not scalable,but it's free,so I decided to use it first for now:) 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 do the .eh_frame and .eh_frame_hdr sections store, exactly?

I know that, when using languages that support exceptions, such as C++, additional information must be provided to ... as possible. Thank you. See Question&Answers more detail:os...

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

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533 views

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linux - How do I recursively list all directories at a location, breadth-first?

Breadth-first list is important, here. Also, limiting the depth searched would be nice. $ find . -type d /foo /foo ... x.findall(///g).length; ) See Question&Answers more detail:os...

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

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983 views

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linux - How to remove the Win10's PATH from WSL

I use Windows Subsystem Linux(Ubuntu 18.04) in my Win10, and I install a Maven in it. Besides, I install a maven ... I use WSL, how should I 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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670 views

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linux - Rsync how to include directories but not files?

I have a directory structure and files like this data/ data/a.txt data/folder/ data/folder/b.txt data/folder ... ""? Thanks for help ! See Question&Answers more detail:os...

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

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940 views

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linux - Simulate Mouse Clicks on Python

I'm currently in the process of making my Nintendo Wiimote (Kinda sad actually) to work with my computer as a ... that this is for 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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724 views

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linux - PostgreSQL CSV import from command line

I've been using the psql Postgres terminal to import CSV files into tables using the following COPY tbname FROM ... logged into psql terminal. See Question&Answers more detail:os...

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

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651 views

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linux - Command line Arduino compiling and uploading?

How do I compile and upload Arduino sketches from the command line on Mac and Linux? I've installed ... there some sample makefiles anywhere? See Question&Answers more detail:os...

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

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704 views

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linux kernel - How much memory could vm use

I read the document Understanding Virtual Memory and it said one method for changing tunable parameters in the Linux VM ... use by the setting. See Question&Answers more detail:os...

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

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962 views

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linux - socat: tunnel IP through TTY

Is it possible to get an bidirectional IP-tunnel over ttyS0-like serial (modem) devices with the socat utility? ... a later version 2 release. See Question&Answers more detail:os...

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

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578 views

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linux - Find and replace a particular term in multiple files

How can I replace a particular term in multiple files in Linux? For instance, I have a number of files in ... and replace it with "replaceword". See Question&Answers more detail:os...

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

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782 views

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linux - Why disabling interrupts disables kernel preemption and how spin lock disables preemption

I am reading Linux Kernel Development recently, and I have a few questions related to disabling preemption. ... by disabling interrupts? See Question&Answers more detail:os...

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

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665 views

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linux - Is there a way to directly send a python output to clipboard?

For example, if a python script will spit out a string giving the path of a newly written file that I' ... system clipboard rather than STDOUT. See Question&Answers more detail:os...

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

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778 views

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linux - Why do I have to use bash -l -c inside my container?

I've created a docker container using the following Dockerfile (truncated): FROM ubuntu:12.04 # curl enables ... docker.io/u/yunojuno/dev/ See Question&Answers more detail:os...

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

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664 views

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linux - How do I access an environment variable in a .desktop file's exec line?

My program requires an environment variable as part of one of its parameters: myprogram --folder=$HOME/.special ... to resolve to nothing. See Question&Answers more detail:os...

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

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1.0k views

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linux - How use Qt in Visual Studio Code?

How do I use Qt in Visual Stuidio Code operating system Linux Mint 18? Marketplace doesnt exist extension for Qt. ... that by type Qt AddIn See Question&Answers more detail:os...

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

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695 views

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linux - Examining C/C++ Heap memory statistics in gdb

I'm trying to investigate the state of the C/C++ heap from within gdb on Linux amd64, is there a nice way ... but still not found what I need. See Question&Answers more detail:os...

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

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