Recent questions tagged linux

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linux - How to limit file size on commit?

Is there an option to limit the file size when committing? For example: file sizes above 500K would produce a ... too late for my requirements. 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 - Disable TCP Delayed ACKs

I have an application that receives relatively sparse traffic over TCP with no application-level responses. I ... worried about portability. 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 - java TrayIcon using image with transparent background

I am using the following code to set a tray icon in Windows and Linux. It works wonderful in Windows and ... EventQueue.invokeLater(runner); } } 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 zookeeper not use my log4j.properties file log directory

In my zookeeper/conf/log4j.properties file I set the zookeeper.log.dir to $HOME/zklogs When I use zkServer.sh it ... hardwire the path here... 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 retrieve the process start time (or uptime) in python

How to retrieve the process start time (or uptime) in python in Linux? I only know, I can call "ps -p ... output. But it is not cool. 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 - docker-compose up leads to "client and server don't have same version (client : 1.14, server: 1.12)" error but client and server have the same version

docker version prints: Client version: 1.0.1 Client API version: 1.12 Go version (client): go1.2.1 Git commit ... I use Ubuntu 14.04 x64. 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 - crontab run every 15 minutes between certain hours

Is this correct scheduled to run between 07:00 and 19:00 at every 15 minutes? */15 07-19 * * * /path/script See Question&Answers more detail:os...

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

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474 views

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linux - How to check if a file exists and is readable in C++?

I've got a fstream my_file("test.txt"), but I don't know if test.txt exists. In case it exists, I would like ... . How to do that? I use 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 - Loading multiple shared libraries with different versions

I have an executable on Linux that loads libfoo.so.1 (that's a SONAME) as one of its dependencies ( ... some special symbol-level versioning? 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 - two file descriptors to same file

Using the posix read() write() linux calls, is it guaranteed that if I write through one file descriptor and ... isn't very helpful on this 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 - Does ldd also show dependencies of dependencies?

I have a binary for which ldd shows an unexpected dependency und libicuuc (from "icu"). #ldd A [... ... in as dependencies of dependencies? See Question&Answers more detail:os...

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

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932 views

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linux - convert bash `ls` output to json array

Is it possible to use a bash script to format the output of the ls to a json array? To be valid json, all ... , but have a pure bash 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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494 views

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linux - Gurus say that LD_LIBRARY_PATH is bad - what's the alternative?

I read some articles about problems in using the LD_LIBRARY_PATH, even as a part of a wrapper script: ... the recommended alternatives? 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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389 views

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linux - .htaccess not working (mod_rewrite)

I have not having any luck getting my .htaccess with mod_rewrite working. Basically all I am trying to do is ... config file for www on apache NameVirtualHost *:80 <VirtualH...

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

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589 views

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linux - How to fix conda update conda permission error

~$ conda update conda Solving environment: done ## Package Plan ## environment location: /home/david/anaconda3 added / ... to go from here. See Question&Answers more detail:os...

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

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479 views

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linux - What is the difference between CLOCK_MONOTONIC & CLOCK_MONOTONIC_RAW?

According to the Linux man page under Ubuntu CLOCK_MONOTONIC Clock that cannot be set and represents monotonic ... still affect CLOCK_MONOTONIC? See Question&Answers more detail:os...

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

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767 views

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linux - Bash script to detect when my USB is plugged in and to then sync it with a Directory

Is there a Bash script and/or daemon that I can write that will detect a specific USB drive and then sync that drive with a 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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559 views

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linux - Rename files in multiple directories to the name of the directory

I have something like this: v_1/file.txt v_2/file.txt v_3/file.txt ... and I want to rename those files ... and file renaming at the same time. See Question&Answers more detail:os...

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

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384 views

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linux - Performance difference between IPC shared memory and threads memory

I hear frequently that accessing a shared memory segment between processes has no performance penalty compared ... multi-threaded application? See Question&Answers more detail:os...

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

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603 views

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linux - arp request and reply using c socket programming

I am trying to receive and send arp packets using c programming in Linux (Ubuntu) My program works fine (i.e. ... answered_packets); exit(0); } See Question&Answers more detail:os...

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

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550 views

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linux - ld: Using -rpath,$ORIGIN inside a shared library (recursive)

I just made a basic example of using ld's -rpath option with $ORIGIN here (see 2nd response for a working version ... l:foo.so instead of -lfoo. See Question&Answers more detail:os...

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

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774 views

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linux - Android SDK - aapt error : libstdc++.so.6 cannot open shared object file

I was creating a new project out of nothing, for testing purpose, leaving all parameter to default (I didn't ... > Reinstalling ADB : No change See Question&Answers more detail:os...

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

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1.1k views

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linux - Postgresql -bash: psql: command not found

I have installed PostgreSQL and it is working ok. However, when I went to restore a backup I got the error -bash: ... ]$ What have I done 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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691 views

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linux - How to remove all non-numeric characters from a string in Bash?

Example: file="123 hello" How can I edit the string file such that it only contains the numbers and the ... echo $file should print 123 only. See Question&Answers more detail:os...

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

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618 views

1 answer

linux - ssh script returns 255 error

In my code I have the following to run a remote script. ssh [email protected] ... verify_bins verify_mysql_connection backup_mysql_rsnapshot See Question&Answers more detail:os...

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

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510 views

1 answer

linux - List supported SSL/TLS versions for a specific OpenSSL build

I have, for example, OpenSSL version 1.0.0o on my Linux system, and I want to know which SSL/TLS ... a shell command to accomplish this? See Question&Answers more detail:os...

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

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691 views

1 answer

linux - update-alternatives: warning: /etc/alternatives/java is dangling

I am facing the problem while running the java program from command line. I have openjdk-6-jdk installed in my ... configure. what 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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919 views

1 answer

linux - How do I compile and link a 32-bit Windows executable using mingw-w64

I am using Ubuntu 13.04 and installed mingw-w64 using apt-get install mingw-w64. I can compile and link a ... 32-bit version of app.exe? See Question&Answers more detail:os...

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

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