Linux

The topics are as follows:Implement a single function of Linux under tree [only prints the number of directories and the number of files (no hidden files)]Preferred we introduce several related Linux system APIs Name of function

Query command find * Find [specify find directory] [find rule] [action executed after find]* Find ~/.m2-name "*.lastupdated"-exec grep-q "Could not transfer" {} \; -print-exec rm {} \;(find files with lastupdated suffix that contain

Very good Linux study book, recommend everyone to seeThis book is a high-quality Linux technology self-study book written by a number of Red Hat Architects (RHCA) based on the RHEL7 system, each chapter of knowledge points from a practical and

Recently found a very scary thing, backup server in the backup directory there is no backup files, carefully look at the original SCP command requires a password problem. Prior to establishing a trust relationship, it may be because the root

Date Modified:The order of 5 months ' time is set as follows:#date-S 05/18/2016Modification Time:The command to set the system time to ten minutes in the morning is as follows. #date-S 10:10:40To modify the time zone:Locate the appropriate time

I. Concept of process group, job, session1. Process group: is a collection of one or more processes. Typically, associated with the same job, you can receive various signals from the same terminal. Each process has a unique process group ID. Each

1. Command format:Date [parameter] ... [+ format]2. Command function:Date can be used to display or set the day and time of the system.3. Command parameters:Necessary parameters:%H hours (expressed in 00-23).%I Hours (expressed in 01-12).%K hours

First, SSH brute force hackThe use of professional crack program, with the password dictionary, login user name, try to log on the server, to crack the password, this method, although slow, but very effective.Second, violent cracking demo2.1. Basic

After this period of time to learn, I also have a certain understanding of Linux, today this blog on the previous knowledge of a summary it.The previous Linux learning blog, from the top down is learning in-depth process, my blog link is as

Scripting for Bash programming until statements and formatted hard disk partitions in Linux (10)1. Summary of circular statement structure1.1.while Statement Enter the Loop statement when the condition is metWhile condition; DoStatementDone1.2.until

Have seen a few times before the concept, but still always remember, simply write it down, easy to see in the future ~The so-called clock time is also called the wall clock time, it is the total number of clocks that the process is running, and its

CP command: cp-copy files and directories"Function" copy function, commonly used to do service configuration file backupCP means copy, is the copy of the abbreviation, copy the file and the intention to rename the file, when copying multiple files,

Linux kernel focuses on the programming wisdom of the world's top programmers, and in the operating system class, the teacher speaks about the four functions of the operating system: Process scheduling memory management device driver network.

#include #include #include #include #include #include #include #include #include #include / * size_t * /#include / * O_accmode * /#include / * Hdio_getgeo * /#include #include #include #include #include / * Invalidate_bdev * /#include

Add account Command: UseraddSyntax: useradd [-u UID] [-G GID] [-D HOME] [-M] [-S]'-U ' custom UID'-G ' makes it belong to a group that already exists, followed by the group ID, or with the group name'-d ' Customize user's home directory'-M '

In the Linux system, there are three commonly used tools for processing text, and grep is one of the Three Musketeers, commonly known as text processing.grep is a powerful text search tool whose full name is: Globally search a Regular Expression and

0. Introduction: We usually say the carriage return line, that is, the end of a line of text file, the beginning of a new line, the concept of English is called End-of-line, shortened to EOL, you can also interpret it as a logical line-break, But

Yum groupinstall "Development Tools" install Linux software in batches Note: You can use yum grouplist to view the list of possible batch installation tasks. From Windows to Linux, it is not a habit to install and delete software on the GUI very

Muduo network library source code analysis (1) EventLoop event loop (Poller and Channel) Starting from this blog post, we began to analyze the source code of the Muduo network library, mainly combining the "Linux multi-thread Server programming" and

USB protocol analysis, usb protocol 1. Description structure of USB devices 1. Logical Organizational Structure The logical organization of a USB device consists of four layers: device, configuration, interface, and endpoint. A device usually has