Linux

there is now no MySQL in the Centos7 yum source and can be installed directly. Mariadb replaced it with a.so if we want to install MySQL database, we can use the following methods# wget

1. Past Optimization SummaryThe start-up time optimization in Linux was followed by two documents, which were optimized in two directions from the kernel and user space."Android/linux Boot Time Analysis optimization" and "use of Bootchart under

YumYum--showduplicates List Ansible | Expand//List available versionsAnsible.noarch 2.3.1.0-3.el7 extrasansible.noarch 2.3.2.0-2.el7 extrasansible.noarch

One, part of the character description:1) ^word matches the content that begins with Word Vi/vim ^ represents the beginning of a line2) word$ matches content ending in Word Vi/vim $ represents the end of a line3) ^$ indicates blank line4).

Linux forgot Password ResolutionMany friends often forget the root password of the Linux system, how should the Linux system forget the root password situation? Do you want to reinstall the system? Of course not! Go to single-user mode and change

The boot process refers to the entire process from powering on the computer until Linux displays the user login screen. Analyzing the Linux boot process is also a great way to get an insight into the workings of the Linux core.　　Start the first step-

ls command-list directory contentsShow file Details:ls -l File command-determine file typeDetermine file type:file Output MIME type strings (--mime-type and--mime-encoding):file -i Stat command-Display file or file system statusShow file status

IntroductionSed is an online editor that processes a single line of content at a time. When processing, the currently processed rows are stored in a temporary buffer called pattern space, followed by the SED command to process the contents of the

Self-study embedded is really not realistic (of course, not that there is no possibility), after all, embedded difficulty is relatively large. Embedded applications are mainly in several directions, one is the development of the system: focus on the

WHOAMI---Current userPWD---show current directorycd/----Starting directory (root directory)LS-----ViewBlue Stands for DirectoryLight Green Representative fileLs-l-----A detailed list under current directoryD begins with the directoryNot with D is a

1. Full-text lookup of the specified stringGrep-rn ' http://new.shirbility.cn '. --include=*.php2. Redis Bulk Delete designated keysredis-cli keys "scene_event*" | Xargs redis-cli del3, Linux Bulk replacement of the specified charactersFormat: Sed-i

1. Bulk replace the file contents of the specified multiple filesIn the specified directory/your/path, find all the files that contain the old_string string and replace the old_string string with the new_string string.sed " s/old_string/new_string/g

command-line environment to know the Linux system in a folder and its containing the actual amount of space occupied by the file, the Linux command du can be very good to meet the requirements.I do not write all of the other uses, I think it will

After the virtual machine is installed, there are two more virtual network cards VMnet1 and VMNET8 in the Network Connection dialog box.First, the virtual device :-VMNET0: Virtual Switch for virtual bridging network-VMNET1: Virtual Switch for

First, Linux:1. View instructions for all environment variablesMethod 1:$:export (Export command is to display, set, or delete Linux environment variables ;)Method 2:$:env2. View a specified environment variableMethod 1:$:export PATHMethod 2:$:echo $

Steps:First, download XshellSecond, on the Linux host, install the upload download Kit RZ and SZIf you do not know the specific name of the package you want to install, you can use the Yum provides */name to find the system's own package information;

Practical date and time modification method, practical date modification method Date and Time Modification1. view the time and date [Root @ qdy ~] # Date Monday, January 1, December 04, 2017 10:02:12 CST Or [Root @ qdy ~] # Clock-0.517451

Linux host modification and linuxhost Modification Sometimes we need to modify the host Name of the host to facilitate management and identification of our own servers. The modification steps are as follows: Step 1: Vi/etc/hosts Under normal

Linux Network Management-Linux network configuration, linux-linux   1.1 linux IP Address Configuration 1 Tib⃣The ifconfig Command temporarily configures the IP address Whether the IP address and DNS address can be automatically obtained depends

Install php5.5 for centos source code and php5.5 for centos source code System Environment:CentOS 6.5/7.0 x86_64Fedora 20 x86_64Download the PHP source code package # Wget http://cn2.php.net/distributions/php-5.5.15.tar.bz2# Tar xf php-5.5.15.tar.bz2