View Linux/aix system memory and CPU consumption percentage

1.linux view CPU and memory usageView memory consumption percentage:[Email protected] ~]# Free-m | Sed-n ' 2p ' | awk ' {print ' used mem is "$" m,total Mem is "$" m,used percent is "$3/$2*100"% "} 'Used mem is 15765m,total mem are 15949m,used

Linux Learning Note (iii): Switching between system run level and run level

The 1.Linux system differs from other operating systems, and it has a runlevel. The run level specifies the state in which the operating system is located. Linux systems run at a certain run level at any time, and the programs and services that run

"Reprint" Linux Process Control-EXEC series exec system call

Inux Process Control-exec series is called the exec system call, actually in Linux, there is no EXEC () function form, exec refers to a set of functions, a total of 6, respectively:#include int execl (const char *path, const char *arg, ...);int

Linux Yum Command detailed

Yum (full name Yellow dog Updater, Modified) is a shell front-end package manager in Fedora and Redhat and SuSE. Based on RPM package management, the ability to automatically download the RPM package from the specified server and install, can

With a day's time, Linux under the expect implementation of SSH automatic login server, despise under the online various copy to copy to the residual jokes

Because of the client side of the fast 30 projects in a special sequence of restart, so have to find a way to write a script, online read a lot of jokes. It's a broken can. No one can work properly. I'll record it in order.The script itselfUse

Linux Network Programming--Introduction to network protocol

We use the Internet every day, have you ever wondered how it is implemented?Billions of computers worldwide, connected together, 22 communication. Beijing, a piece of network card sent out the signal, Shenzhen, another card incredibly received, the

Linux Learning one: Installing JDK and Tomcat

Using SECURECRTFirst, the installation of CentOS Rzsz,1.yum Automatic Installation:Yum Install Lrzsz    2. The manual installation method is as follows:2.1. Download software rzsz-3.48.tar.gzwget

Linux Basics: 8, document properties, basic commands Introduction (3)

Document properties)We all know that under Windows, if we want to view the properties of a file or directory file, we can view it by right-clicking on the target file and selecting Properties. Also under the Linux file also has its own attributes,

Linux Anaconda Kickstart Basics

Boot process for boot media:Isolinux-AnacondaStructure within the disc media:Efi/efi relatedLIVEOS/LIVECD the associated image file.packages/Packageimages/store various boot media image files (image file).isolinux/The usage directory of the boot

Linux log System

Log system on LinuxSyslogSyslog-ng:Syslog Service:SYSLOGD: System, non-kernel generated informationKLOGD: Kernel, specifically responsible for recording the log information generated by the kernelLogs need to be scrolled (log cut):Messages Messages.1

Linux log System

Log system on LinuxSyslogSyslog-ng:Syslog Service:SYSLOGD: System, non-kernel generated informationKLOGD: Kernel, specifically responsible for recording the log information generated by the kernelLogs need to be scrolled (log cut):Messages Messages.1

How to query the contents of the active folder through Ldapsearch under Linux

Starting from Win2000. Microsoft abandoned NT domains and used active folders to manage Windows domains. The active folder is Microsoft's folder service based on the LDAP protocol. It is assumed that the 389port of the active folder will be opened

Linux Command! Tips for using

Just a little trick, I personally prefer to use the up and down keys to choose.[Email protected] local]# cd/usr/local/[email protected] local]# ls!$ #本次命令使用上个命令的参数ls/usr/local/ #显示本次实际运行的命令Bin etc Games include Lib Lib64 libexec sbin share

Porting of Linux file systems-making JFFS2 file systems


The full name of the JFFS2 is the journalling Flash file system Version2, which was developed by Redhat Corporation (flash memory; English: Flash memory), and its predecessor was jffs, The earliest support is nor Flash, since the 2.6 version of the

Linux Iptables detailed

Firewall (iptables)First season-----------------------Understanding FirewallsNetFilter and IptablesWhat is netfilter, in fact, it is a firewall module, and iptables is the management of NetFilter software, here to clarify the relationship between

Linux inverted quotes, single quotes, double quotes

1. Inverted quotation marks indicate commandecho now is ' date ' or Echo now is $ (date)2. Single quotation markName=andy no problem,If you want to Name=andy Niu, error: Bash:niu:command not found, the program considers the first space after the

Thread consumption PID from CTS test Testcheckforduplicateoutput to Linux kernel

Recent Toss, the individual tests are easy to get through, but the joint test is hung

Compression and decompression in the Linux operating system,. zip,. tar,. tar.gz,. tar.bz2,. Tar.xz,. jar,. 7z, etc.

Zip formatCompression: Zip-r [ target file name ]. zip [ original file/directory name ]Decompression: Unzip [ original filename ]. zipNote: the-r parameter represents recursionTar format (this format is only packaged, not compressed)Package: TAR-CVF

Linux Threading Implementation Mechanism analysis (reprint)

Since the concept of multithreaded programming has emerged in Linux, the development of Linux multi-line applications has always been related to two issues: compatibility, efficiency. Starting from the threading model, this paper analyzes the

Advanced usage of the Linux sort sort command

In Linux, it is easy to sort by rows by using sort.But sometimes life always throws you a question. If you use sort to sort by multiple column values, tab is used as a delimiter, and some columns need to be sorted in reverse order, the sort command

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