Cloud Applications

On the campus network, the CERT certification under the tulinux finally settled the problem one afternoon and finally got online through the cert certification under the virtual machine's login tulinux. Because no tutorial can be found during the

PYCURLERROR6-& quot; Couldn & amp; #39; t installation error, apache installation startup solves the statement yuminstallcvssysstatlrzszgccgcc-c ++ ncurses-devellibxml2-devellibjpeg-devellibpng-developen executed on the server... pycurl error

Shell code #! /Bin/bashforain $ @ docase $ ainfile *) file & quot; $ (echo $ a | sed & amp; #39; s /. * //; s/% sp % // g & amp; #39;) & quot; list) modelist... shell code #! /Bin/bash for a in $ @ do case $ a in file = *) file = "$ (echo $ a |

Write a simple shell command parser environment: RedHat9.0 kernel 2.4.20vi file editor 6.1.320gcc3.2.2-5 implementation steps: Step 5: write a simplest shell command interpreter, this program is taken from APUE example 1-5. the command cannot

Solve the problem that penpencil cannot be exported in ubuntu. in the past two days, we used the prototype of the penpencil design project. the penpencil version is 2.0.3 and ubuntu12.04, but the output of png and exported html are all false, unable

When setting the rsync service, you sometimes need to provide some game or website logs to other departments. at this time, you can obtain the logs by using ssh for their server accounts. but for security, you should use rsync to configure the

Many computer enthusiasts imitate the DIR environment scripts from Unix or Linux operating systems. However, many people start from other systems and use different commands and different types of interactions. For example, it is very likely that

LVS + Keepalived for high-availability load balancing I. Principle 1. summary if you divide TCP/IP into five layers, Keepalived is similar ~ Software with layer-5 switching mechanism, with 3 ~ The layer-5 switching function is mainly used to detect

In linux, tar command instance tar packaging is a very important command for server O & M, because many data backups need to be packaged first and then transmitted in scp or rsync, here we will introduce the basic commands of tar to help you review

RedHatEnterpriseLinux5DHCP service configuration 1. check the installation package in the system. by default, the software package required for the DHCP server is not installed: rpm-qa | grepdhcp * // check whether the DHCP server software package

Special character processing for Shell in Linux: In non-regular expressions, matching is not greedy: * match any string in the file name, including null string? Match any single character [a-z] in the file name... info & nbsp; | & nbsp; special

Icinga1.8.4 Chinese version installation record 1. the operating system in the system environment is Centos6.464-bit. in the past, it was a basic unused server with 2 GB memory and GB hard disk. the installation system is relatively simple. I used

VIM series: When reading the project source code in VIM, the search function will frequently jump to and search for variables, type definitions, and functions, the jump function can be implemented with the ctag and cssag tools described earlier.

Set the kernel parameters of shared memory in Linux. in Linux, shared memory involves three kernel parameters: SHMMAX, SHMMNI, and SHMALL. besides the default value, we can also make temporary or permanent changes to the environment and application

Passwd: AuthenticationTokenManipulationError is reported when you change the password of a single CENTOS user. before resolving a CentOS5.3 WEB server, you can use ssh to connect remotely with the key. suddenly one day, you cannot connect remotely.

The time synchronization centos command must be the same for multiple servers. one of the servers must be used as the time server, and the other servers must be updated on a regular basis. 1. run the following command to install ntp on the time

To solve the problem of installing scp command and error in CentOS, you need to transfer files between two virtual machines in the test. The first thought is the scp command. The result is:-bash: scp: commandnotfound is automatically installed using

Powerful batch shell command 1. first, rsh or ssh must be normal in the environment. 2. configure nodes (all managed node hostnames). 3. Script # catdsh #! /Bin/shcommand $ @; forIin 'cat. /nodes | grep-v ^ # 'do... powerful batch shell command 1.

VMware host mode: 1. after the system has installed the system for CenterOS, install VMwaretools and click the summary view at the top of VMware. at this time, the host will be the same as operating the local program, I don't know how fast it is...

Apt-get is reading The Package List... Error $ sudoapt-getinstallsynaptic is reading The Package List... error! E: EncounteredasectionwithnoPackage: headerE: ProblemwithMergeList/var/lib/ap... apt-get is reading the package list... $ sudo apt-get