Linux

Many libraries provide several classes, how to tell the caller whether an error occurs when each method goes wrong, and the error code (the global errno in Error.h on Linux is to save the error code that our Linux program executes)? There are many

Configure IP after installing into the systemMethod One: The graphical interface is directly configured, under the system under the prefrecens below the network settingsMethod Two:Select Bridge Networking when installing the virtual

# yum install -y pptp pptp-setupLook at IP list from http://ip.line668.com/ip.php, look for foreign IP.# pptpsetup --create 107_149_9_75 --server 107.149.9.75  --username USERNAME --password PASSWORD --encrypt --start# route add -net 173.194.126.0

under Linux, the tab command key should be one of the most commonly used buttons in your work. Using the tab when using commands such as LS,CD can help us to reduce the number of keyboard inputs, for example, if we want to enter a directory with a

1. Computer Architecture: (Five components)Arithmetic deviceControllerstorage, memory, addressingOutput deviceInput device2, how to achieve line multiplexing: This requires that the operator has a storage device, and this device is a register. 3.

The test is ready, make a note system is CentOS 6.31, direct command crontab-e Edit the file, write the time and the command you want to execute. Example */1 * * * * * sh/home/guanliyang/try.sh# above is executed every minute try.sh file, test

1) The program should be small and single-minded, the program should be as small as possible, and only focus on one thing, do not develop those who look useful but 90% of the situation is not used to the characteristics;2) program is not only

With Linux almost also has a year of time, has been encountered any problem to check, no detailed study, now look back to see Bird uncle's Linux experience, combined with online information to do some summary, and practice, so that it can become

A brief history of network farmer _unixHttp://wenku.baidu.com/view/983823343968011ca300910a.htmlLinux---Linus Torvalds---1991Thompson designed the first two important concepts of Unix:1. All programs or system devices are files.2. Regardless of

#!/bin/shdeldir= "/root/crontab_test/test" #3 minute agodeltime= "-mmin +3" #delete file typefiletype1= "' *.txt '" Filetype2= "' *.log '" #write to tmp filerm Crontab_del_3min-ftouch crontab_del_3min # Every minute delete *.txt file 3 min Utes

Top Command The top command is a common performance analysis tool under Linux that shows the resource usage of individual processes in the system in real time, similar to the Task Manager for Windows. Here is a detailed description of how it is

Kthreadd: This kernel thread has only one function, which is to manage the dispatch of other kernel threads. It is created when the kernel is initialized and loops through a function called Kthreadd, which is the function of running the Kthread

Rotten mud: tar packaging and decompression for CentOS command learning, centostar This article was sponsored by Xiuyi linfeng and first launched in the dark world. The tar command is generally used for packaging and decompression. You can view the

[RK_2014_0920] Code comparison tool Beyond Compare 4 in Ubuntu, appendix, rk_2014_0920ubuntu 1. Beyond CompareIntelligent Comparison Beyond Compare is focused. Beyond Compare allows you to quickly and easily compare your files and folders. By using

Common configuration of vi Editor, vi Editor When you use vim to edit a terminal, by default, the editing interface does not display line numbers, syntax High Brightness Display, smart indentation, and other functions. To better work in vim, You

Common Linux commands (version 2)-network communication commandsNetwork Communication commands 1. write/usr/bin/write Format: write [user name] # Write is a real-time communication tool provided that the user has logged on to the server host. # Use

Common Linux commands (version 2)-compression and decompression commandsCompression and decompression commands: ----------.Gz ---------- 1. Compression Gzip [GNU zip]:/bin/gzip Format: gzip option [file]. ZIP file. The extension name is .gz after

Centos firewall initialization setting method Step 2: log on to the centos System by Using ssh or directly using the root user with the highest permissions on the local machine, Run "iptables-F", and confirm. After the command is confirmed, no

Centos Nic eth1 changed to eth0 Method In virtualization, the virtual machine NICs cloned from the template are named eth1, and some programs or scripts that involve NICs are written with eth0 by default, the problem of changing eth1 to eth0 is as

Detailed explanation of ethtool commands in CentOSEthtool is a command used to query and SET network interface card parameters. Usage Overview:Ethtool ethx // query the Basic settings of the ethx network port. x indicates the ID of the corresponding