Linux

The IPCS command provides information about some inter-process communication methods, including shared memory, message queue, signal IPCS usage IPCS-A is the default output information to print out all inter-process communication information in the

Name: CDPermission: All UsersUsage: CD [dirname]Note: change the working directory to dirname. Dirname can be an absolute or relative path. If the directory name is omitted, it is changed to the user's home directory (that is, the directory where

Name: RmPermission: All UsersUsage: Rm [Options] Name...Delete files and directories.Parameters:-I ask for confirmation one by one before deletion.-F the original file is deleted directly even if its attribute is set to "read-only". You do not need

Linux Process Monitoring Method Copyright Notice: It can be reproduced at will, but the original author charlee and original link http://tech.idv2.com/2006/08/31/linux-system-process-monitoring/must be indicated in a timely manner. The following

Name: CatPermission: All UsersUsage: CAT [-abeensttuv] [-- help] [-- version] filenameNote: connect the archive string and upload it to the Basic output (screen or add> filename to another archive)Parameters:-N or -- number indicates the number of

Command name: chmod　　Permission: All Users　　Usage: chmod [-CFVR] [-- help] [-- version] mode file...　　Note: The file calling permissions for Linux/Unix are divided into three levels: file owner, group, and others. Chmod can be used to control how

Name: FindUsage: FindInstructions for use:　　List the files that match the expression in the file system. You can specify a combination of different information such as the name, category, time, size, and permissions of an archive. Only the

Name: CutPermission: All UsersUsage: Cut-cnum1-num2 filenameDescription: displays the text of each row starting from num1 to num2.Example:Shell> cat ExampleTest2This is test1Shell> cut-c0-6 example # the first 6 characters starting with

Name: lsPermission: All UsersUsage: ls [-alrtafr] [name...]Description: displays the contents of a specified working directory (list files and subdirectories contained in the current working directory ).Parameters:-A: displays all files and

Function Description:Create a user account. Syntax:Useradd [-mmnr] [-C ] [-D ] [-E ] [-F ] [-G ] [-G ] [-S ] [-u ] [User Account] Or useradd-d [-B] [-E ] [-F ] [-G ] [-G ] [-S ] Note:Useradd can be used to create a user account. After the account is

ReprintedThe Linux kernel module programming guide (2) continued Sighofwraith posted on 16:48:39 2.5. Hello World (part 4): licensing and module documentation   If you are running on a kernel later than 2.4, you may find the following in the

[Root @ rhfour ~] #Fdisk-l Disk/dev/SDA: 5368 MB, 5368709120 bytes 255 heads, 63 sectors/track, 652 Cylinders Units = cylinders of 16065*512 = 8225280 bytes   Device boot start end blocks ID system /Dev/sda1*1 13 104391 83 Linux /Dev/sda2 14 459 3582

1. Check whether the SuSE Telnet service is installed (Telent-server is not installed by default .) # Chkconfig-list The List displays the following information, indicating that the telnet service has been installed. Xinetd based services: TELNET:

Nic naming rules in Linux: eth0 and eth1. The first Ethernet Card and the second card. Lo is the loopback interface, its IP address is fixed to 127.0.0.1, And the mask is 8 bits. It represents your machine.1. ifconfig is used to view the NIC

The error message "Drivers/RTC/hctosys. C: Unable to open RTC device (rtc0)" is displayed when Linux 2.6.22 to S3C2440 is transplanted. The solution is as follows: Solution: The startup information shows that the RTC driver is not loaded

I. Role of the device driver The most significant role is to allow computers to communicate with devices and act as hardware interfaces. The operating system can only use this interface to control devices. Second, the driver mentioned in the book

1. Introduction to streaming media Streaming media refers to the continuous time-based media transmitted using stream technology in the network. It features that the entire file does not need to be downloaded before playback, but is played by

In fact, people should not care too much about appearance. How do I feel like I am lifting a rock and hitting my feet .... But there is always one thing... This is: the heart of beauty, all people. My system fedora 17 (gnome 3.4.2)1) Dock

This is the c ++ code used to simulate an HTTP request to upload files. Some code is extracted from the internet. I will share it here as needed, one is counted as personal notes, and the other is used as a reference for the readers who encounter

Document directory View the memory status from the kernel perspective System memory usage from the application layer perspective Similarities and differences between buffers and cached Create a swap Activate and use swap Remove swap Physical