Linux

The so-called file permissions, refers to the file access rights, including the file read, write, delete, execution, under Linux, each user has different permissions, ordinary users can only in their own home directory to write operations, and in

I. Add, toggle, delete user Group commands Groupadd/newgrp/groupdel 1. Groupadd command Used to create a new user group. The syntax format is: Groupadd [-g-o] GID Group The specific meanings of each option are as follows: -G: Specifies the GID

I. Concepts and classifications of processes 1. The concept of the process Linux is a multi-user multitasking operating system. Multi-user means that multiple users can use the same Linux system at the same time; multitasking means that you can

Basic concepts of Disk Management Linux system all hardware devices are used in the way of file, we refer to these files as device files, Linux/dev directory in a large number of device files, according to the different device files, but also

Linux is a multi-user, multitasking operating system. In such a system, the allocation and management of various computer resources (such as files, memory, CPUs, etc.) are in the process unit. To coordinate the access of multiple processes to these

The main task of process control is to implement effective management and control of all processes in the system from the generation, existence to extinction of the whole process. Process control is typically implemented by the kernel of the

One of the biggest benefits of Linux is that its source code is open. At the same time, the open core source is also attracting countless computer enthusiasts and programmers, they read and analyze the core source of Linux as their greatest interest,

As with windows, it often happens that you modify partitions manually under Linux. But Linux is a little bit more cumbersome than Windows: Modified partitions, naturally mounted in the/etc/fstab, rather than in the/etc/rc.local after the boot mount.

JDK Installation: [Root@b home]# ls Jdk-1_5_0_12-linux-i586-rpm.bin Lost+found Oracle 1, the JDK to extract [Root@b home]#./jdk-1_5_0_12-linux-i586-rpm.bin 2, will extract files copy to/usr/java under [Root@b home]# CP

By default, the GNOME desktop's face version of the clock applet has only a few controllable options, we can only choose the 12/24 format, or select the date/second hand display. Now, this little trick gives you complete freedom to control your

Note: The target of the invasion if it is a Linux server, see To avoid cleaning traces of the time do not forget history command records Oh! 1, modify the/etc/profile histsize=1000 to 0 or 1 Clears the user's home path. Bash_history 2, immediately

I use binary for installation, filename mysql-standard-5.0.18-linux-i686-glibc23.tar.gz[1] Extract the above file to a certain place, and MySQL so directory name to MySQL, the result should be as/home/jiang/mysql[2] According to the MySQL directory

One, the LVS technology main 3 kinds of ways 1, Nat (address translation technology) Through network address translation, the LVS Scheduler rewrites the destination address of the request message and assigns the request to the backend real Web

The new firewall subsystem/packet filtering engine nftables will replace the more than 10-year-old iptables in Linux 3.13. Iptables/netfilter was added to the 2.4 kernel in 2001. Born in 2008, the Nftables design replaces Iptables, which provides a

There are two ways to implement a task plan: 1. Perform a task at a future point in time Two commands can be specified: At Batch (The use of at is only indicated here) At time At> COMMAND At> Ctrl+d The specified time Absolute time: hh:mm,

The source code is the text written in a specific language, such as our common C language. However, the installation of the source code to be configured, compiled a series of complex processes, so why the trouble to install the source code? In fact,

Linux Ext2 file System, is the Gnu/linux system standard file system, its characteristics for access to file performance is excellent, for small and medium-sized documents show advantages, which mainly benefit from its cluster rapid-layer of good

We all know that Linux systems are incredibly powerful, but sometimes it's not necessarily what we want, and in some cases what we want is a simple system that consumes less resources and can run some basic functions and basic instructions. At this

This article discusses the scope of the problem that samba encounters during use. Question 1: In Win2000 Client, use Chinese to do filename, to Linux command line, become garbled how to solve? Workaround: It is possible that Unicode is not

We introduced a small Linux based on BusyBox, and this article introduces the micro Linux that is produced from beginning to the start of the system, and its function is perfected gradually. System Startup process: Post power On self test, loading