Linux

The source code is as follows:#include #include intMainintARGC, Char*ARGV[]){if(ARGC! =3){printf("%s \n", argv[0]);return-1; } Char*passwd=Crypt(argv[1],argv[2]);printf("passwd: %s\ n", passwd);return 0;}Summarize:Char*crypt (Const Char*Key,Const

In Unix-like systems, you can use top to view information such as system resources, processes, memory consumption, and so on. View network status You can use Netstat, nmap and other tools. To see real-time network traffic, monitor TCP/IP

Recently learned something about Linux, one of which is about SSH (Linux remote login)Here's a summary:First, about SSH installationSuppose we need to log on to host bit B, terminal input on Host B: SSH localhostIf it appears:This means that SSH is

Linux zip commandZip-r myfile.zip./*All files and folders under the current directory are compressed into myfile.zip files, and-R indicates that all files in the subdirectory are compressed recursively.2.unzipUnzip-o-d/home/sunny Myfile.zipUnzip the

Early on the Internet to see the Zareason company launched the industry's first Linux super Ben Ultralap 430 News. By searching online, I learned that Zareason is a U.S. company that specializes in producing and selling preinstalled Linux desktops,

To write a makefile file:ACCESS.O:ACCESS.C cd_data.hGCC $ (CFLAGS)-i$ (INCLUDE)-C ACCESS.C16APPLICATION:APP_UI.O ACCESS.OGCC $ (CFLAGS)-o application app_ui.o ACCESS.O $ (LIBS)19Clean:RM-F Application *.OMissing delimiter error occurs after you

LCD driver under Linux will automatically turn off the screen after 10 minutes, we can modify the code so that it does not automatically turn off the screenThere is a drivers/char/vt.c file in which there is a variable (blankinterval) that can be

1.linux access to HTTPS certificate issues [[Email protected] ~]# curl -v https://mobile.mycard520.com.tw* about to  connect ()  to mobile.mycard520.com.tw port 443  (#0) *   trying  220.130.127.122... connected* Connected to mobile.mycard520.com.tw 

A fully running Linux system consists of many subsystems (introduction, Cpu,memory,io,network, ...). ), monitoring and evaluating these subsystems is part of the performance monitoring. We often need macroscopic view of the whole system state, also

CPU usage depends primarily on what kind of resources are running on the CPU, such as copying a file that typically consumes less CPU, because most of the work is done by DMA (Direct Memory Access), but after the copy is complete, the CPU knows that

Have the ability to come out, do not have the ability to be a turtle!If let me answer about the process stack, line stacks problem, as long as the problem is not general, as long as the problem is clear, I will lay it on to answer, the correct rate

Recurring Process (Task Scheduler)Task Scheduler: Perform one or a series of tasks at some point in the future. Execution results are sent to the administrator in the form of a messageWhen Cron starts, he reads the configuration files, saves them in

Recently need to use the Linux script Interactive way to add users, their own three scripts to share and record, easy to follow-up, but also share, I hope to help the same shell script rookie.Example one: Add users in an elegant wayFollow the

1. How to forward the local 80 port request to 8080 port, the current host IP is 192.168.16.1, where the local NIC eth0:For:# iptables -t nat -A PREROUTING -d 192.168.16.1 -p tcp --dport 80 -j DNAT --to 192.168.16.1:8080Or# iptables -t nat -A

Role:A router, gateway that looks at which IP addresses the packet passed through during transmission.Working principle:First send a TTL of 1 UDP packets to the remote host, according to the protocol, the router receives the packet, the TTL value

Centos performance monitoring series 2: initial solution of CollectlFor a Linux system administrator, it is the primary responsibility to ensure that the system managed by the Administrator is in a good state.Linux administrators can find many tools

Ubuntu Gnome and Fedora 22 Gnome Desktop use extensions to implement global menus Ubuntu Gnome and Fedora 22 Gnome Desktop use extensions to implement global menus First Extensions used My topic (Installationsudo dnf copr enable

Compile and install httpd in centos 1. Install the component first. [root@localhost~] #yumgroupinstalladditionaldevelopment [root@localhost~] #yumgroupinstalldevelopmenttool 2. Install ap1.5.2r (Apache Portable Runtime) and apr-util

Build an ftp server on CentOS 7 This article uses the latest CentOS 7 to learn how to build various Linux servers. Today we are sharing the idea of building an ftp server (ps: we do not recommend using the latest system for learning because the

Set up rsyslog log server using centos The system is centos 6.5x64 Server Yum install-y rsyslog Mkdir/data/log Vi/etc/sysconfig/rsyslog # SYSLOGD_OPTIONS = "-c 5" # R indicates that receiving is allowed, x indicates that DNS resolution is not