Cloud Applications

At work, some colleagues often complain that their English is not very good. reading some error messages and configuration documents is not easy. now I will set some major English documents to Chinese, we hope to help you in this process. 1. the

Alias command function description: some of the commands that we often use but are very long at system management. Then we can create an alias for these long strings of commands. This long string of commands can be directly replaced by an alias. The

We know that rm is generally used to delete files in Linux, but the rm command does not actually clear the contents of the data block that saves the file, instead, it only releases the index nodes and data blocks occupied by the file. Therefore, the

Part 1: cluster system configuration § 1. 1: The system is installed here using CentOS5.5X64 as an example to build a cluster. we will not go into details about the system installation. remember to choose gcc, g ++, and gfortran during the custom

Modify the resolution of Linux text (command line) mode In my system text mode, the default resolution is 800*600. when I use lynx to browse the webpage, I feel that the font is too large. if I want to adjust the resolution in this mode, I will go

It is actually a few simple commands. (1) after the USB flash disk is mounted and deleted and inserted into it, the command line will display and respond. In this case, use $ fdisk-l to view all the partitions and drive letters, and then $ mkdir/mnt/

Set the root user to telnet to the linux system. by default, the ROOT user cannot connect to the Linux operating system through telnet, which is also insecure. but technically, it can be implemented. # mv/etc/securetty. save and exit the bak. You

Export Project: [plain] viewplaincopy # svnadmindump/var/svn/pro1 & gt;/mydata/pro1.backup import project: create a project warehouse: [plain] viewplaincopy # svnadmincreate/var/svn/pro1/execute import: [plain] viewplaincopy # svnadminlo Export

View access. log file ip statistics [plain] viewplaincopycataccess. log | awk & #39; {print $1} & #39; | uniq-c | sort-k1, 1nr remove r from high to low [plain] viewplaincopycataccess. log | awk & #39; {print $3} & #39; | sort | uniq-c | sort View

Today, let's review how to configure multiple IP addresses for a single NIC in linux. one is to use commands for direct configuration, and the other is to write the configuration file by yourself, now let's talk about it one by one. 1. use the

1. first, check the number of hard disks on the machine: $ fdisk-lDisk/dev/sdd: 1000.2 GB, 1000204886016bytes255heads, 63 sectors/track, 121601 cylindersUnits = cylindersof16065 * 512 = 8225280 bytesSectorsize (logical/physical): 5 1. first, check

A chance of accidentally installing a DB database found that the installation was slow, so the system engineer suggested that I test the hard disk read/write speed and found that the read/write speed was only about 200, the machine is dellR710

If the sudo permission of zhangsan is added. Modify the/etc/sudoers file and add the following line under root. Add the username zhangsan: disable root user logon: modify the/etc/ssh/sshd_config file, remove the # number before PermitRootLogin,

When you use ssh to connect to a remote server, if you do not perform the operation for a long time, the remote connection may be interrupted. Buffer data such as executing programs and vim will be lost. SecureCRT uses SecureCRT to connect to the

Disable the ctrl + alt + del key combination & #8226; by default, ctrl + alt + del is a delay of 3 seconds to restart the system. the delay between sending an alarm message to the process and killing the process signal is 3 seconds. & #8226;

The ctrl + alt + del key combination function is set in the/etc/inittab file. the iniitab file contains the following two lines: # TrapCTRL-ALT-DELETEca: ctrlaltdel: /sbin/shutdown-t3-rnow press ctrl + alt + del will restart the system, but there

Iptables is an extremely flexible firewall tool designed for Linux operating systems. Iptables is useful for Linux geeks and system administrators. This article will show you how to configure the most common Linux firewall. IptablesIptables is a

The su command is used to switch to another user identity. If "user" is ignored when su is used to switch identities, the system switches to the "root" identity by default and requires a password. When switching from the root user to another user,

LinuxIDERedHat firewall activity. cattail-f log file description/var/log/message information and error logs after the system is started, it is one of the most common logs in RedHatLinux:/var/log/secure and security-related log

I. LVM (LogicalVolumeManager) is a mechanism for managing disk partitions in Linux. LVM is a logical layer built on hard disks and partitions, to improve the flexibility of disk partition management. DM logical device introduction 1. physical volume