Cloud Applications

If you use YUM to install software, you don't need to look for the dependency RPM everywhere. Very convenient. Step 1: install yum Step 2: Download the createrepo package and install ftp: //

As the system runs longer and longer, the size of log files increases. If these historical logs are stored in the system for a long time, a large amount of disk space will be occupied. Users can directly delete these log files, but deleting these

Chapter 2: configure the relationship between nagios and configuration files description 2.1 The Main configuration file of the main configuration file option Nagios is/usr/local/nagios/etc/nagios. cfg this article briefly describes the important

After the redhat system was reinstalled today, when installing apache, I encountered the noacceptableCcompilerfoundin $ PATH error. I found some information from the Internet and asked me not to install gcc or other compilers. for convenience and

1. install the telnet service on the server. for installation instructions, see 2. modify the telnet configuration file and enable the telnet service. (Of course, you can also use the setup command to start the system service and check the telnet

Linux clock is divided into system clock and hardware (RealTimeClock, RTC) clock. The system clock is the clock in the current LinuxKernel, and the hardware clock is the clock powered by a battery on the motherboard. This hardware clock can be set

I learned the application of the cluster two days ago. to sum it up, the cluster is not very difficult to understand. as long as I master its principles, it is not very difficult to implement it. Next, let's take a simple look at the cluster. What

In linux low-level file programming, file locks are an important part of multi-user multi-task operating systems. When updating a file, you expect to use a mechanism to prevent both processes from simultaneously updating the file in the same region,

When reading documents in vim, I often find words that I don't know. I used to directly press ctrl + c to translate them in google, which is very troublesome. So I want to find a method that is similar to Kingsoft's software, but it is a tool used

User and group management command useradd & lt; user name & gt;/create a user grep & lt; user name & gt; /etc/shadow/verify whether the user is successfully created (the last user created on the last line of the configuration file) passwd & lt;

A permission mask umaskumask is supported by chmod and has a total of four bits (gid/uid, owner, Group permission, and permissions of other users). However, the last three bits are usually used, for example, if you use chmod755file (the permission

System environment: RHEL5.31.alias can be used to set the alias of a command, for example, [root @ localhost ~] # Alias // view the default set alias aliascp & amp; #39; cp-I & amp; #39; aliasl. & amp; #39; ls-d. * -- colortty & amp; #39; aliasll &

1. on the Grub boot loader menu, select the entry you want to enter and Type e to enter the editing mode. 2. in the second line (similar to kernel/vmlinuz-2.6.15roroot/dev/hda2), Type e to enter the edit mode; 3. add init/bin/bash at the end of the

# Uname-a # View kernel/OS/CPU information # head-n1/etc/issue # View OS version # hostname # View Computer Name # lspci-TV # List all PCI devices # lsusb-TV # List all USB devices # lsmod #... # Uname-a # View kernel/operating system/CPU

I don't know why the net-snmp built-in in centos cannot catch a lot of information, and the CPU network traffic memory cannot catch it. After a while, I decided to use the code to compile and pull it down. Wgethttp: //

NetworkManager and NetworkManagerDispatcher automatically switch between multiple network connections. if your computer has WirelessWiFi and Ethernet, open it and select the best available connection for you. If you only use one network connection,

A: RPM Package. this kind of software package is just like the windows EXE installation file. all the files have been compiled and packaged, and the folder to which the files should be put has been specified, installation is very convenient. in the

Unix/Linux/BSD all have three special files, respectively. 1) the standard input is STDIN. in/dev/stdin, it generally refers to the keyboard input, and the shell code is 02) standard output STDOUT, in/dev/stdout, usually refers to the terminal

The dynamic link library management command also needs to run the dynamic link library management command-ldconfig. this execution program is stored in the/sbin directory. the ldconfig command is mainly used in the default search directory (/lib and/

System optimization and security settings the last time we talked about FreeBSD's basic software installation and configuration. next we will talk about the detailed configuration and security settings of the system. 1. system optimization settings.