Recent questions tagged Linux

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linux - Run script with rc.local: script works, but not at boot

I have a node.js script which need to start at boot and run under the www-data user. During development I ... does not work. What is happening? 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 to convert uXXXX unicode to UTF-8 using console tools in *nix

I use curl to get some URL response, it's JSON response and it contains unicode-escaped national characters like ... encoding to save into 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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linux - Is /usr/local/lib searched for shared libraries?

Is /usr/local/lib searched for shared libraries ? I have this error: [Leo@chessman ~]$ whereis ffmpeg ffmpeg: /usr ... 50.36.0 [Leo@chessman ~]$ 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 - Difference between Resident Set Size (RSS) and Java total committed memory (NMT) for a JVM running in Docker container

Scenario: I have a JVM running in a docker container. I did some memory analysis using two tools: 1) top 2 ... MB (Java Total committed memory)? 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 to perform a for-each loop over all the files under a specified path?

The following command attempts to enumerate all *.txt files in the current directory and process them one by one ... help' for more information. See Question&Answers more detail:os...

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

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449 views

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linux - Start script after another one (already running) finishes

So I have a process running, and it will take several hours to complete. I would like to start another process ... bash scripts, 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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linux - How to compile/install node.js(could not configure a cxx compiler!) (Ubuntu).

How can I compile/install node.js on Ubuntu? It failed with an error about cxx compiler. See Question&Answers more detail:os...

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

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546 views

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linux - How can I change php-cli version on Ubuntu 14.04?

I am new to using Linux and I broke some php settings while tampering. If I execute a php script containing: phpinfo() ... to also use php 5.6? 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

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linux kernel - Difference between physical/logical/virtual memory address

I am a little confused about the terms physical/logical/virtual addresses in an Operating System(I use Linux- ... help is deeply appreciated. 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 - run a python script in terminal without the python command

I have a python script let's name it script1.py. I can run it in the terminal this way: python /path/script1.py .. ... ... how can i 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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503 views

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linux - Can I use GDB to debug a running process?

Under linux, can I use GDB to debug a process that is currently running? See Question&Answers more detail:os...

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

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973 views

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linux - Bash: infinite sleep (infinite blocking)

I use startx to start X which will evaluate my .xinitrc. In my .xinitrc I start my window manager using / ... will kinda like freeze the script? See Question&Answers more detail:os...

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

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638 views

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linux - multiple websites on nginx & sites-available

With the base install of nginx, your sites-available folder has just one file: default how does the sites ... host multiple (separate) websites? See Question&Answers more detail:os...

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

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754 views

1 answer

linux - Counter increment in Bash loop not working

I have the following simple script where I am running a loop and want to maintain a COUNTER. I am unable to ... ) echo $COUNTER # output = 0 See Question&Answers more detail:os...

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

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527 views

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linux - "zero copy networking" vs "kernel bypass"?

What is the difference between "zero-copy networking" and "kernel bypass"? Are they two phrases meaning the ... and this is the relationship? See Question&Answers more detail:os...

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

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477 views

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linux - Ruby: Installing rmagick on Ubuntu

I'm trying to get RMagick setup on Ubuntu 10.04. Looked here but had no joy. I even compiled and installed ... :( Any and all help appreciated! See Question&Answers more detail:os...

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

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460 views

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linux - How do I script a "yes" response for installing programs?

I work with Amazon Linux instances and I have a couple scripts to populate data and install all the programs I work ... now sure how 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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474 views

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linux - Forking vs Threading

I have used threading before in my applications and know its concepts well, but recently in my operating system ... don't run simultaneously? 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

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linux - Rename all files in a folder with a prefix in a single command

Rename all the files within a folder with prefix "Unix_" Suppose a folder has two files a.txt b.pdf then ... command to Unix_a.txt Unix_b.pdf See Question&Answers more detail:os...

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

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488 views

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linux - In Bash, how do I add a string after each line in a file?

How do I add a string after each line in a file using bash? Can it be done using the sed command, 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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583 views

1 answer

linux - How do I download a tarball from GitHub using cURL?

I am trying to download a tarball from GitHub using cURL, but it does not seem to be redirecting: $ curl - ... smart enough to figure this out. See Question&Answers more detail:os...

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

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435 views

1 answer

linux - How do I create a configure script?

This may sound like a very generic question but here it goes. I have a requirement to create a configure script ... an example I can follow? See Question&Answers more detail:os...

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

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489 views

1 answer

linux - Using colors with printf

When written like this, it outputs text in blue: printf "e[1;34mThis is a blue text.e[0m" But I want to ... has defined format as in my case. See Question&Answers more detail:os...

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

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665 views

1 answer

linux - Crontab Day of the Week syntax

In crontab does the Day of the Week field run from 0 - 6 or 1 -7? I am seeing conflicting information on this ... i.e. would the cron still run? See Question&Answers more detail:os...

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

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537 views

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linux - How do I edit /etc/sudoers from a script?

I need to edit /etc/sudoers from a script to add/remove stuff from white lists. Assuming I have a ... just finding something that works. See Question&Answers more detail:os...

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

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531 views

1 answer

linux - How to concatenate multiple lines of output to one line?

If I run the command cat file | grep pattern, I get many lines of output. How do you concatenate all lines into ... /g isn't working for me. See Question&Answers more detail:os...

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

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663 views

1 answer

linux - How to specify more spaces for the delimiter using cut?

Is there any way to specify a field delimiter for more spaces with the cut command? (like " "+) ? For example: ... to do with 'cut'? 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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560 views

1 answer

linux - CentOS 64 bit bad ELF interpreter

I have just installed CentOS 6 64bit version, I'm trying to install a 32-bit application on a 64-bit machine ... linux. How do I resolve 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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