Cloud Applications

LINUX boot system selection setting background: I have used a dual system: WIN8 + CentOS6.3. during the past few days, I have been unable to choose which system to use when I start the system, and I cannot use the keyboard, go to the default system.

Statistics on the number of connections in linux connection status: netstat has poor performance when the number of connections exceeds 4 W. Let's take a look at the ss command: ss-t-a # count all TCP connections ss-u-a # count all UDP connections

Linux system partition Linux partitions are completely different from windows, so many people are familiar with the windows format and do not quite understand the Linux habits. in Linux, there is no drive letter or something, only directories are

The linux process memory usage sorting command checks the linux server today. to view the usage of each process, use [qhkf @ 116share ~]. $ Toppiduserprni1_resshrs % CPU % MEMTIME + COMMAND29613build150158m713... run the linux process memory usage

DHCP configuration: automatically obtain IP addresses for linux and windows I. prepare for the experiment 1. check whether dhcp is installed [root @ vm2root] # rpm-qa | grepdhcp [root @ vm2root] # // not installed [root @ vm2root] # cd/home [root @

Vi & amp; vim move cursor scroll screen Abstract: 1) Move the cursor inside the screen; 2) move the cursor inside the ROW; 3) screen scroll; vi & amp; vim has the compilation mode and command mode. the following cursor movement operations are

The establishment of an NFS network file system is dependent on the RPC service. RPC acts as a proxy for other services to establish network connections and implement network transmission, work on TCP/UDP port 111 RPC is provided by portmap, General

Usage text interval of the sed (file) command: -------- # add an empty line sedG after each line # Delete all original blank lines and add an empty line after each line. # In this way, each row in the output text is followed by an empty row. Sed &

List of common commands for iptables: command-A, -- append example iptables-AINPUT... it indicates that a new rule is added to a rule refining, and the rule will become the last rule in the rule refining. Command-D, -- delete example iptables-DINPUT

Initrd. I recently installed a server with the driver added to the imgfile. I couldn't find the RIAD card driver. I used DELL to install the drive on a CD. the damn DELL didn't support the CENTOS system, if you want to extract the driver from the

Install taglist (1) http://www.vim.org/scripts/script.php?script_id273 Download the latest version of taglistplugin. The current version is 4.6. (2)unziptaglist.zip-d ~ /. Vim will be in ~ /. Vim File: plugin/taglist... vim install taglist (1) http:/

Ubuntu12.04 install aircrack-ng and reaver install aricrack-ng1.sudoapt-getinstallbuild-essentiallibssl-dev2.wgethttp: // download.aircrack-ng.org/aircrack-ng-1.1.tar.gz3.tar-xzvfa ubuntu 12.04 install aircrack-ng and reaver install aricrack-ng 1.

When you use awk to calculate the maximum value, minimum value, and average value to help colleagues solve the problem, you need to query the maximum value, minimum value, and average value of a specific value on the day from the log, and finally

In the grubrescue mode when Ubuntu is started, the grubrescue partition is changed from sda3 to sda2 due to partition modification in Windows. in this way, grub cannot be found, when Ubuntu is started, grubrescue & gt appears. in this case, you can

Replace the $ symbol in Bash with the LinuxShell parameter to replace the parameter name with the value represented by the parameter. For $, braces are optional, that is, $ A and $ {A} represent the same parameter. $ {} Has the following expressions

Rvmnginxpassengerrails configuration server install passenger1geminstallpassenger installation ngnix1passenger-install-nginx-module has installed nginx and passenger, default configuration and command 1 # configure 2/opt/nginx/conf/nginx. conf...

Ubuntu 13 to install sshserver if you directly run sudoapt-getinstallopenssh-server, will prompt the error, installation is not available, you can download deb installation package to the following address, http://pkgs.org/ubuntu-13.04/ubuntu-main-i3

Edit APACHEhttpd for binding domain names to apache2 in Ubuntu. conf file vim/etc/apache2/httpd. added the following code to conf: Java code ServerNamelocalhost & lt; VirtualHost *: 80 & gt; ServerNamewww.52juchang. edit APACHE httpd by binding a

Register Tomcat as a Linux service. this document takes Tomcat 6 as an example. Step 1: Create a file named Tomcat 6 (without a suffix). replace the Txt code in the path where Tomcat is located. /etc/init. d/functions [-f/usr/local/apache-tom...

Let Ubuntu10.04 perfectly support Thinkpad little red dot Trackpoint inscription: from a point, enter Ubuntu! I have been using Ubuntu for more than three years. At that time, I started the trial with curiosity about Linux. later, I had no chance to