Linux

Add a fixed character to the beginning of a file or to the end of a line1. Add a fixed character to the beginning of the line: Sed-i ' s/\ (^\)/character/g ' file.txt2. Characters with fixed length at the beginning of a line (1 of the length of a

The GNU program, also known as the Slave program, is Richard Stallman was publicly launched on September 27, 1983. Its goal is to create a set of completely free operating systems. One of the reasons why Richard Stallman first published the news on

Cdcd = Change DIRPWD view current Location CD-back to last directory (alternating remote CONTROL key) CD ~ Current user home directory CD. Current directory CD: Go to Parent DirectoryLsLs-l Display Directory/file details ls-a Show hidden

The role of the kernelProcess Management: inter-process switchingMemory Management: Memory space split into kernel space and user spaceIO Management: The use of the underlying hardware must be implemented from within, not by the user-space process

Tail Command writes a file to standard output starting at the specified point. Using the-f option of the tail command makes it easy to see the log files that are being changed, TAIL-F filename will display the most trailer in filename on the screen,

1. Find the command pathwhich commandfind/-type f-name "command"whereis-b commandlocate command2. Detailed Find commandFind path-type F finds all files under the pathFind path-type f-name "file name" finds the specific file under the path3.

Accompanying notes:grep filteringSED fetch lineawk fetching columns1. grepgrep Lookupgrep-v Filter Finder  Syntax: grep content parameter line number file-a displays matching rows and preceding rowsgrep 30-a 1.txt Display 30 front 10 lines-B

Because of the need for debugging, I need to compile 32-bit target files under a 64-bit machine.The following error occurred while running the make commandFatal error:gnu/stubs-32.h:no such file or directoryRealize that I am a 64-bit system that

The Dragon Boat Festival is squatting at home!1, man 1 means query Linux instructions2 refers to the Linux API3 refers to C library functions2, Path path pathname full path name file name3, in the RM CP and so on plus-f meaning that the return value

View file Sun.txt Plus parameter i is the display node Inode[Email protected] test]# Ls-li sun.txt10006225-rw-r--r--. 1 root root 0 June 2 10:26 sun.txtNext, create the hard link ln[Email protected] test]# LN sun.txt sun123.txt[Email protected] test]

1. ifconfig command temporarily configures IP address　　Ifconfig command: View and configure network status commandssuch as: Ifconfig eht0 192.168.0.200 netmask 255.255.255.0 #临时设置eth0网卡的IP地址与子网掩码2. Setup tool Permanently configures IP addressSetup

JDK Installation1. See if Linux is 32-bit or 64-bitExecute command: File/bin/ls2. Download the JDKDownload Linux system 32-bit or 64-bit version jdk (RPM format)：Http://www.oracle.com/technetwork/cn/java/javase/downloads/jdk7-downloads-1880260.html3.

650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M02/82/7D/wKiom1dWoNHxi7zBAADVm-nHaNQ429.png-wh_500x0-wm_3 -wmp_4-s_4239319459.png "title=" Linux directory tree. png "alt=" wkiom1dwonhxi7zbaadvm-nhanq429.png-wh_50 "/>/ root directory/bin

Installation ruby-1.8.7 a compile error. The following: ossl_pkey_ec.c:815:error: ' ec_group_new_curve_gf2m ' undeclared (first use of this function) Ossl _pkey_ec.c:815:error: (Each undeclared identifier are reported only

This time introduce the process scheduling algorithm of the operating system Operating system scheduling is divided into three kinds: 1. Remote dispatch (Create a new process); 2. Medium-Range scheduling (part of the switching function); 3.

Linux Shell series (8) Shell printf command explanation and printf command explanation This article is Part 8 of the Linux Shell series tutorials. For more shell tutorials, see the Linux Shell series tutorials.In the previous article: Linux Shell

Ln command, ln Ln -- generate a connection file LINK Command path:/bin/ln   Example 1: Create a soft connection # Ln-s/etc/issue/tmp/issue. soft The parameter s is used to create a soft connection. Executing the above command will create a

The most complete Vim Shortcut Key Map in history (getting started to advanced)The most complete Vim Shortcut Key Map in history (getting started to advanced) classic edition The following key map is the most common classic edition. Corresponding

Linux File basic attributes Linux is a typical multi-user system. Different users are in different positions and have different permissions. To protect the security of the system, Linux requires different users to access the same file (including

How to disable Ubuntu notification prompts using NoNotifications A notification will be displayed on the right of the desktop when a mobile phone is connected to a wired or wireless network in Ubuntu or when a new system is updated, this feature can