Linux

Configuring the JDK environment variables1. Decompression: TAR-ZXVF jdk-8u121-linux-x64.tar.gzCreate a new Folder2. By order[Email protected]/]# VI etc/profile3. Add at the end:unset IUnset-f PathmungeExport JAVA_HOME=/USR/JAVA/JDK8Export path=

Snapshot capabilities for virtual machines:Right-click on the Machine tab you want to access, this instance is right-click on the Aminglinux-01 tab, clicking "Snapshot"--"take snapshot" 650) this.width=650; "Src=" https://s2.51cto.com/wyfs02/ M00/97/

Linux-Proficient KILL command　　Regardless of which operating system you use, you will definitely encounter an application that is behaving erratically, locking itself down and refusing to shut down. On Linux (and Mac). You can force an end to it

1.ls (List listing)LS: Lists all files in the current directory (without hidden files)Ls-a: Lists all files in the current directory (including hidden files)Ls-l: Lists all the files in the current directory and displays detailed information　　ls-a-l

Linux file operations:Directory Management Commands:mkdir: Create an empty directory, the last node in the creation path given at the time of creation is the directory that needs to be createdmkdir./dir_name when creating an empty directory under

First to popularize a life-saving knowledge point-snapshot function:disk "Snapshot" is Virtual Machines Disk File (VMDK) at some point in a timely copy ( System Restore points similar to Windows ). system crashes or system exceptions, you can

Use Xshell to connect the Linux1. Download Client2. New session650) this.width=650; "src=" Http://oqjg6c4c1.bkt.clouddn.com/201705311636_210.png "style=" border-style:none; Background-color:rgb (255,255,255); "/>3. EditingEdit basic information 650)

Video link:1. What are routine orders (divided into two types, one cyclical and one sudden)1.1 Linux Job scheduling types: At, cron (at is burst, cron is cycle)What are the common routine commands on the 1.2 system? (log rotate, database rpm,locate

To download the client using the Putty Remote link Linux operation step: Install PuttyAfter successful installation, open the Putty client 650) this.width=650; "src=" Http://oqjg6c4c1.bkt.clouddn.com/201705311519_305.png "style="

# Install the necessary componentsYum install-y gcc pcre* openssl-devel# Create groups and usersGroupadd NginxUseradd-g Nginx nginx-s/sbin/nologin# File storage DirectoryMkdir/etc/nginxMkdir/var/log/nginxMkdir/var/cache/nginxChown

Script Description:File backup is the basic work of Linux system maintenance, and this script uses an incremental backup of tar, which can be added to crontab in timed execution.The directory or files that the script backs up are all written to a

The IP protocol provides unreliable, non-connected datagram delivery services.Unreliable (unreliable): The IP protocol does not guarantee that datagrams will successfully reach the destination, it only provides transport services. When some kind of

The processing of interrupt exceptions in Linux system drivers is very similar to the bare metal development interrupt processing process. By simply reviewing the bare Metal development interrupt Processing section, refer to learning the interrupt

Historical Command--historyhistory-c Empty History commandHistory-w The history command in the cache to the history command to save the file, the default file is ~/.bash_historyThe history command saves 1000 by default and can be modified in the

a Samba Services1 Preparation Environment=====>part1:iptables-f#systemctl Disable FIREWALLD #开机默认关闭#systemctl Stop Firewalld #立即关闭#systemctl Status FirewalldSetenforce 0#/etc/sysconfig/selinux#SELINUX =disabled=====>part2:Configure IP2 Installing

Before analyzing set_base in Linux, we defined; EAX is TSS0 offset address;ebx are kernel_base address 0x10000;ecx is Gdt_address;edi 0x20set_base:addl%ebx,%eax; EAX = eax + ebx = 0x10000 + TSS0 offset address addl%ecx,%edi; EDI = edi + ECX =

comparison with classic doubly linked list?? Classic doubly linked list. There is a pre pointer and a next pointer, and the data is within the node of the linked list.?? A list of kernel links. There is only one pre pointer and one next pointer in

CD: Change directory such as CD/can change to root directory ls: Display file name can be used in conjunction with CD, LS can display the file name under the current directory pwd: Display the current working path RM: Delete file Cat: Display text

                                          1 can run queue ( based on real-time process scheduling )The most important data structure-type running queue in the scheduler (Runqueue) . A running queue is a linked list of running processes on a given

Check the Startup File in three ways to start bash shell, Three methods to start bash shell 1. Use the default logon shell 2. Interactive shell as a non-Logon shell 3. non-interactive shell used as a script   1. log on to shell When you log on to