Linux

The configuration data forwarding, can pass 1, the route forwarding namely uses the router realizes;2, using NAT forwarding;To put it simply:The information in the routing table is just the next place in the router where the packet is specified.

Syntax: tar [main option + Secondary options] file or directoryWhen using this command, the main option is required, and it tells Tar what to do, auxiliary options are auxiliary and can be used.Main options:C Create a new profile. Select this option

# chmod u+x ./jdk-6u45-linux-i586.bin1.# ./jdk-6u45-linux-i586.bin在按提示输入yes后，jdk被解压到./jdk1.6.0_45目录下。为与下面2中JDK安装路径一致，我们进行下列操作,在/usr/java下建立安装路径，并将文件考到该路径下：# sudo mkdir /usr/java# sudo cp -fr ./jdk1.6.0_45 /usr/java2.修改所有用户的环境变量# sudo vim

Fundamentals of the ten-year OPS series-LinuxZeng LinContact: [Email protected]Website: www.jplatformx.comCopyright: Please do not reprint the article without permission First, IntroductionThe Linux system contains very many files! This

Useradd Wangyunpeng Create a user named Wangyunpeng passwd wangyunpeng to wangyunpeng This user to change the passwordTo use a new user for quick connect:Touch ABCD -l show file list long format pwd view the absolute path of the

1. Installing SVN yum-y Install Subversion2. Create a repository directorymkdir/root/svn/Svnserve-d-r/root/svn/3. Create a version librarySvnadmini create/root/svn/www.food.comIn this case, there are some configuration files in the www.food.com

The Linux kernel consists of 5 subsystems: Process scheduling (SCHED), memory Management (MM), virtual file system (VFS), network Interface (NET), and interprocess communication (IPC).1. Process schedulingProcess in the process scheduling subsystem

Special note: In Linux, directories usually have R and x two permissions. The previous question of deleting a file is to have W permission on the directory where the file resides.CD/tmp switches to the TMP directory under Touch chengshi.list-L

The main modified files are cat/etc/sysctl.conf, and the core parameters are reloaded by sysctl-p after modification.1, net.ipv4.tcp_fin_timeout = 30 After the socket connection is disconnected, the system recycles the handle after a few seconds,

Netstat-n | awk '/^tcp/{++s[$NF]} END {for (a in S) print A, s[a]} 'Time_wait 8947Fin_wait1 15Fin_wait2 1Established 55Syn_recv 21CLOSING 2Last_ack 4 TCP Connection Status detailedLISTEN: Listening for connection requests from a

A few days ago in Imooc casually read a public class, learned a few common commands, recorded here, slowly accumulate. It feels like learning one, sometimes it's better to have a better memory than to follow a book and learn from the beginning.1.

? ? A few days ago to see an article, very agree with one of the words Linux只是一个工具，工具不是目的，只是手段。 ?? Today is not about how to learn Linux, just casually talk about my thinking of Linux. One of the most important concepts in Linux is ' files ', and

A folder's R (readable) permission allows the user with this permission to see the directory structure within the folder, but cannot access the folder without the X (executable) permission. Therefore, to enter the folder must have X permission, W

64-bit system with Ubuntu 14.04 + new kernel linux-3.14.34Https://www.kernel.org/pub/linux/kernel/v3.x/linux-3.14.34.tar.xzBefore using/boot/grub/grub.cfg do not make changes, if you have changed the best to remove the previous changes.In order to

Look at some of the information that some Linux comes with jdk1.4, if it comes with jdk1.4, the first thing to do is to unload jdk1.4. Practice: Input command: #rpm-QA | grep GCJ If the output does not have the content, the description does not have

What is a configuration file?/etc contains a system-specific configuration file. The so-called configuration file, which is used for the control program to run local files, it is in most cases "read-only" and "private" files, and is editable.1.

Linux System when you enter and execute commands in the shell (console), the shell automatically logs your commands to the history list, which is typically saved in the. bash_history file in the user directory. By default,historydoes not log the

Whereis Useradd Find the location of the command Useradd and also find out where its Help file is located whereis rm Find the location of the command RM, and also find out where its Help files are locatedWhereis passwd View passwd file location, in

More/etc/inittab Paging View Inittab file contentsgrep multiuser/etc/inittab Find the location of the multiuser string in Inittab file contentsGrep-i Multiuser/etc/inittab Find the multiuser string in the location of the Inittab file contents

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