Linux

Today is the second day of classes. It rained heavily yesterday, a little cold.Ethernet (Ethernet) internet Internet. init command:Post-add run level. 0--6 seven levels.   0 downtime, 1 single user, 2 multiuser, no NFS (Network File system), 3

One, the simplest partitionOnly the root directory (/) and the simplest memory replacement space (swap) can beTake the partition of the virtual machine (20G) as an example:General to the 15G to install the Linux system, 512M to swap, the other 4G

Computer systems consist of hardware systems and software systemsFirst generation computer tube eraThe second generation of computer transistor eraThe third generation of computer IC eraThe era of fourth generation computer LSI1964, the world's

Log the Linux commands you use every day.1. View the Linux port number NETSTAT-APN | grep 802. Kill Process Kill-s 9 pid(Tomcat may not boot up, either the remote debug port is not down or the Tomcat port is not off)3, change the permissions of the

I. VSFTPD.CONF section configuration instructionsThe following configuration items are the easiest to confuse and record.1. Restrict logged-in users to other directories:chroot_local_user=Yes #本地所有账户都只能在自家目录chroot_list_enable=Yes

Linux and Cloud computing--the second phase of Linux Server SetupChapter III: SSH server erection (bottom) OpenSSH advanced650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M01/84/7E/wKioL1eR7ZHCKzJZAAddXjRcms0785.jpg-wh_500x0-wm_3 -wmp_4-s_1068

First, terminal and shell1, terminal terminal meaningPhysical Terminal: Direct access to the computer's display and keyboard and other devices.Virtual Terminal: A virtual input device that is attached to a physical terminal in a software way.       

1, Command introduction:Locate is used to find files, which are found in the system's database, so it is very fast.2. Command format:Locate [option] mode---The pattern here is the expression3. Command parameters:-E will be excluded from the scope of

What is LVM?LVM is a logical volume manager that can integrate multiple physical partitions to look like a large disk, and the greatest use of LVM is to elastically adjust the file system's capacity.Several concepts related to LVM The PV

The device space in Linux is determined by two conditions: hard disk capacity and inodeHDD capacityThat is, the hard disk available capacityInodeThat is, the index node number (the size of the record file, the helper, permissions, block places and

The VI command is the most versatile full-screen plain text editor in Unix operating systems and UNIX-like operating systems. The VI editor in Linux is called Vim, which is the enhanced version of VI (VI improved), fully compatible with the VI

It must be said that with the development of the Times, as the older generation of Linux file system EXT3/EXT4 has been slowly outdated, poor concurrency, space constraints and other problems slowly exposed.And the next generation of file systems,

2. grep commandgrep (Global search Regular expression (RE) and print out of the line, full search of regular expressions and print out rows) is a powerful text search tool that uses regular expressions to search for text. and print out the matching

Threading ConceptsA thread, sometimes called a lightweight process (lightweight PROCESS,LWP), is the smallest unit of program execution flow.A thread is a single sequential control flow in a program. A relatively independent, scheduled execution

Resources shared by each thread:1, File descriptor table.2, the processing of each signal (sig_ign, SIG_DFL or custom signal processing function)3, the current working directory.4. User ID and group ID.Separate resources for each thread:1, thread ID.

1, the installation of SSHsudo apt-get install sshor, in the case of Linux, it comes with SSH, starting with the second step2. Generate keySsh-keygenThe middle procedure will prompt you to place the key where you enter the file in which to save the

Terminal & Job Control & session START process, Super TerminalProcess Group In addition to a process id, each process also belongs to a process group. A process group is a collection of one or more processes. Usually they are associated with the

Common linux commands 1. Create a folder: mkdir test 2. Create a file: touch file 3. Delete the current folder, that is, delete the current directory: rm-r test/ 4. Delete all folders and files in the current folder, but do not delete the

A server deployment in linux 1. Let's talk about the program deployed this time. There are two java programs and a java web project. 2. java programs are originally intended to be compiled and run using javac and java. However, the project

Samba Sharing ServiceMethod 1: Install samba: Check whether it has been installed: rpm-qa | grep samba. If not, install it on your own, this section describes an online installation mode based on the RPM package yum.Yum is a fast installation mode.