Category:OS

  • Python error message is: sudo: apt get: command not found

    Time:2020-1-24

    1. Problem description The error message is: sudo: apt get: command not found 2. Causes and Solutions Use Yum install XXX under CentOS Differences between Yum and apt getGenerally speaking, famous Linux systems are basically divided into two categories:1. RedHat series: RedHat, CentOS, Fedora, etc2. Debian series: Debian, Ubuntu, etcRedHat collection1. The common installation package […]

  • An example of Linux shell array loop

    Time:2020-1-24

    Shell array loop Test shell array, example of loop: arr=(“a” “b” “c”) Echo “everything is as follows:” ${arr [@]} Echo “length of array:” ${ා arr [*]} for var in ${arr[@]} do Echo “what to print:” $var done The output is as follows: The above is a detailed explanation of the Linux shell array loop. If […]

  • Shorthand guide to Linux common files and network operation commands

    Time:2020-1-24

    ls Copy code The code is as follows: $LS – view files in the current directoryconf lnmp_install.sh README vhost_ngx_pagespeed.shinit.sh ngx_pagespeed.sh source vhost.sh Copy code The code is as follows: $LS conf – view files in the conf directoryindex.html nginx.conf pureftpd-mysql.conf tz.phpinit.d.nginx pure-ftpd.conf script.mysql Copy code The code is as follows: $LS – a ා show […]

  • Win10 20h1 quick preview 19023 starts to push

    Time:2020-1-24

    Microsoft today pushed the latest Windows 10 20h1 quick preview 19023. This update does not bring new features, but there are new improvements and fixes. Previously, Microsoft released the update 19013.1122 of windows 10 20h1 preview, which indicates that the development of windows 10 20h1 has entered a new stage. According to previous news, the […]

  • How do Apple Mac play. Wma and. WMV files?

    Time:2020-1-24

    As we all know, QuickTime, the player of Apple Mac, can play many formats by default. But we can’t directly play. Wma and. WMV files (these two formats are commonly used in Windows media files), so we need to use some third-party software to solve this problem. The following editor will recommend several players that […]

  • Centos6. X character set optimization details

    Time:2020-1-24

    PHP FPM memory optimization is in progress recently. Run the command pmap $(pgrep php-fpm|head -n 1) Found a 99m large file loaded in memory /usr/lib/locale/locale-archive This file is about language support. By default, it includes various languages and character set support. The server uses character interface, which doesn’t need so much at all. It’s almost the […]

  • Bat will shut down automatically at a fixed time, bat will automatically end the task and close the program, and DOS will shut down after the program is automatically ended

    Time:2020-1-24

    Auto end program NTSD is a DOS command, which is used to end some dead processes that cannot be ended normally.The usage is to open CMD and enter the following command to end the process:Method 1: use PID of process to end the processCommand format: ntsd-c Q-P PIDCommand example: NTSD – C Q – P […]

  • What is the downloadplus.exe process and what is its function? Is the downloadplus process safe

    Time:2020-1-24

    Process file: downloadplus or downloadplus.exeProcess name: Download plusProcess category: process with security risk English Description:downloadplus.exe is an adware which gathers information regarding your browsing usage and sends it back to the euthors servers for analysis. This triggers pop-up advertisments Chinese reference:Downloadplus.exe is an advertising software, which will send back your browsing preferences to its server […]

  • Built in judgment statement of Linux shell

    Time:2020-1-23

    Built in judgment, return 0 if successful, return non-zero if unsuccessful Test judgment expression [judgment expression] note that spaces must be left before and after Numerical operation -EQ equals -NE is not equal to -GT greater than -Ge is greater than or equal to -LT less than -Le less than or equal to String operation […]

  • How to update and upgrade win10 20h1 slow preview 19013.1122 manually?

    Time:2020-1-23

    It is reported that windows 10 20h1-19013 may become the official version, and it is expected to be launched in January or February 2020. On November 12, Microsoft pushed the windows 10 20h1 preview 19013.1122 update to slow channel users. If you upgrade to windows 10-1909 (18363.449) or windows 10-1903 (19013.1), you can get the […]

  • Complete analysis of parameters and return results of LS command in Linux

    Time:2020-1-23

    The LS command is mainly used to display the details of the directoryBy default, the file information in the current directory (excluding files and folders starting with). Is listed, and the entries are arranged alphabetically The syntax is as follows Copy code The code is as follows: ls [OPTION]… [FILE]… Parameter Introduction (not too remote)-a. […]

  • CentOS using script management service

    Time:2020-1-23

    1. Use tools: chkconfig to manage the service startup script under the directory / etc / RC. D / init. D or / etc / init. D /. To add two lines at the beginning of the service startup script:                            # chkconfig: 2345  88 12                            # description: XXXXXXXXX XXXXXX This allows you to […]