Linux

FirewallMain model firewall (Protect yourself)Network-based protection wall (to protect a network)Implementation of hardware firewall software firewallIptables172.40.55.10 (to protect yourself with iptables)[Email protected] ~]# rpm-q

View Environment variables Echo $PATH Temporarily modify environment variables export PATH=/XXX: $PATHThis method disappears after the terminal is closed and is only temporarily changed. Modify the environment variables thoroughly, to edit the

What is routine work?In fact, for routine work, it is necessary to work periodically in the current environment.Under Linux, there are 2 types of routine work:One is sudden, and after that, there's no such thing.At:at is a command that can handle

1. Rights Management Command chmodOnly administrators and file or directory owners can change permissions.U represents user,g on behalf of Group,o on behalf of Other,a allPermissions: R for Read,w on behalf of WRITE,X on behalf of exec+ means add

grep :Searches for text based on pattern (mode) and displays lines of text that conform to the pattern, without modifying the original file .Usage: grep [options] ' pattern '/file #也可以利用管道进行匹配-I ignore ignoring case--colour the matched string with a

1. User Configuration fileIn/etc/passwd, some basic information about each user is stored, and the operating system manages the user based on that profile. Use the man 5 passwd command to view a description of the configuration file　　　　

I. Introduction of CrondCrond is a daemon that is used to periodically perform certain tasks or wait for certain events under Linux, similar to Scheduled tasks under Windows, when the operating system is installed, the Service tool is installed by

1. find:paths must precede expression[Email protected]/]# Find Find/u01/app/diag/tnslsnr/fossdb/listener/alert-name log_*.xmlFind:paths must precede expressionUsage:find [-h] [-l] [-p] [path ...] [Expression][Email protected]/]#To find data,

I. BACKGROUNDSystem administrators often require SSH or telent telnet to a Linux server and often run tasks that take a long time to complete, such as system backups, FTP transfers, and so on. Usually we open a remote terminal window for each of

First, Introduction http://liaoph.com/iptables/Second, the operation1) iptables Add and revise check http://blog.51yip.com/linux/1404.htmlThird, the application1, NAT address translation--to achieve the external network forwarding intranet1) Turn on

1 upload the JDK that will be installed to the Linux system first2 Move the uploaded JDK to the/usr/local folderMV jdk-6u24-linux-i586.bin/usr/local/3 Go to this folderCd/usr/local4 Add an executable permission to the JDK you just moved overchmod 777

First, LdconfigLdconfig is a dynamic link Library Management command that runs the management command--ldconfig of the dynamic link library in order for the dynamic link library to be shared with the system. The purpose of the Ldconfig command is to

To make it easy to distinguish each thread in a process, you can give each thread a name by Prctl () . In this way, in the process of executing a program that creates multiple threads, it is possible to know which thread a PID or tid corresponds to,

Solve the Problem of deep music and wine program tray icons in ubuntu, ubuntuwine In the ubuntu unity desktop environment, the tray icons of non-System Panel such as deep music are not displayed due to the White List problem, and only one wine

After upgrading Ubuntu 16.04 LTS, the DSL dial-up Internet (ppp) connection is automatically disconnected. Solution: ubuntu16.04 There was no problem with dial-up Internet access in Ubuntu 15.10, but after upgrading 16.04 LTS, it was found that the

Show processlist, showprocesslist Mysql> show processlist; # Check the hosts connected to the mysql server, and lists the databases + ----- + ------ + ----------- + ------ + --------- + ------ + ------- + ------------------ + | Id | User | Host | db

Basic operations on managing Ubuntu 16.04 LTS software package We have already introduced the new features of Ubuntu 16.04 in the previous article. With the release of Ubuntu 16.04 LTS, the management commands of Ubuntu software packages have also

Use Graphviz to generate an automated system diagram If you have created a system environment architecture diagram, you may be aware that the manually created diagrams usually expire after the creation date. This article describes the basics of the

Install Flash Player Plug-ins for Chromium, Chrome, and Firefox in Ubuntu 16.04 Ubuntu 16.04 LTS has been officially released for some time. Many Linux fans like to use the open-source Chrome browser (the open-source version of Google Chrome) on the

Tmuxomatic: Managing tmux sessions With the popularity of tmux, the number of peripheral tools has gradually increased. Tmuxomatic schedules a tmux window session in a way called windowgram. Once the session is organized and saved to a file, it can