Linux

determine if it is a built-in directive type [-TPA] name If the instruction string is too long, how can I use two lines to output it? cp/var/spool/mail/root/etc/crontab \>/etc/fstab/root if the volume is a widening of the content, you can use the "$

The data in the server is the most important, the data of commercial use is more important, once lost, the result is unimaginable. So backup is important. Can be used to Rsync+crontab to do data synchronization.Method/Step The first is the

1. WriteFunction: Send information to the developing user within the systemSyntax: Write user name2, WallFunction: Broadcast to all users3. PingSyntax: ping-c number of IP4, IfconfigFunction: View network settings

1, Gzip/gunzipFunction: Compress/Unzip filesNote: (1) Only the files can be compressed, the directory cannot be compressed, (2) after the file is compressed, the source file is gone.Grammar:Gzip file nameGunzip Compressed file name2. TarFunction:

Edit/etc/sysconfig/network-scripts/ifcfg-eth0First, modify the IP address[Email protected] network-scripts]$ VI ifcfg-eth0Device=eth0Onboot=yesBootproto=staticipaddr=219.136.241.211netmask=255.255.255.128gateway=219.136.241.254Second, modify the

0th step: Log in with RootFirst step: Make MrproperStep Two: Make OldconfigStep three: Make MenuconfigFourth step: Make DEPFifth step: Make Bzimage (Here you can get a cup of tea first)Sixth step: Make modules (Here you can drink 2 cups of

9 Linux Network commands that must be learned by the Intermediate DBA to see which of the following commands have not been used I recently wrote an article "Do DBA must learn, will not die 11 Linux basic commands", blog address: http://www.bkjia.com/

Vi (vim) keyboard diagram and its basic commands, vivim keyboard Diagram  Go to vi Vi filename open or create a file and place the cursor at the beginning of the first line Vi + n filename open the file and place the cursor at the beginning of line

In gcc/Linux kernel, the likely, unlikely, and _ attribute _ (section ("") attributes, gccattribute Check the Linux kernel source code and you will find many if (likely (""))... and if (unlikely (""))... statements. These statements are actually an

Operating system --- learning notes 00, --- learning notes 00 Note: This document follows the "Netease cloud classroom"-Harbin Institute of Technology-instructor Li Zhijun's Open Class course. I would like to thank Mr. Li for his busy schedule to

Linux File packaging and Compression In Linux, many compression commands are supported. Common extension names of compressed files include *. gz, *. bz2, * .tar.gz, * .tar.bz2, and so on. Compression and decompression are very common functions, but

Find (2) for Linux commands) The previous article has introduced the test of expressions, which is the core of the find command. Now we will introduce the options and actions of expressions.(1) options -D,-depth: the two serve the same purpose.

Linux/proc/stat file description /Proc/stat File Content # cat /proc/stat cpu 1411 1322 3070 1193539 2790 0 268 0 0 0cpu0 472 658 787 297933 695 0 19 0 0 0cpu1 314 157 728 299238 170 0 1 0 0 0cpu2 322 441 1069 296914 1727 0 246 0 0 0cpu3 302 66 485

Common ubuntu command lineSoftware Update and Installation Source update: sudo apt-get updateSoftware Update and update of installed packages: sudo apt-get upgradeSoftware Installation: sudo apt-get install xxx (xxx is the software to be

Command for viewing Linux system information [Guide]System uname-a view kernel OS cpu information head-n 1 etc issue view OS version cat proc cpuinfo view CPU information hostname View computer name lspci-TV list all PCI devices lsusb-TV   System #

Linux study --- build a VPN Server in Ubuntu Build a VPN Server in Ubuntu What is VPN? It is a virtual private network. The function is to establish a private network on a public network for encrypted communication. Applicable scenarios: 1. Your

Install eclipse on centos61. Download eclipse What I download is eclipse-jee-juno-sr2-linux-gtk-x86_64.tar.gz. You can download it at http://www.eclipse.org/downloads /.2. Input CentOS in Win7  3. decompress the file Go to the tool

Linx monitoring sharing-disk space monitoring + email reminder Share the first monitoring script. mount point disk space usage monitoring: If the used space reaches 75%, an alarm is triggered and an alarm email is sent. Install Netease's email

Install VMwareTools in KaliLinuxIntroduction Kali Linux is a Debian-based Linux release designed for digital forensics and penetration testing. Installing Kali Linux is simple, but it is a bit difficult to install VMware Tools, because you will be

[Linux] conversion between the date command Timestamp and time Most of the time we view the data in the database, or some data in other systems needs to be queried using timestamps, or the query results are timestamps. In addition, you must enter a