Cloud Applications

Shell_01 what is the basic operation? what is Shellshell? shell is a command interpreter echo $ SHELL -- through the environment variable cat/etc/shells -- view the switch of the shellshell currently registered to the System 1. temporary switch

A CentOS Operating system was installed to test Nginx server load balancer before linux network devices could not be started. My colleague once upgraded the VM and recently tried to test KeepAlived on it. Therefore, the service cannot be connected.

The unix and dos formats in vim were converted a long time ago. the old-fashioned telex typewriter used two characters to create a new line. One character moves the slide frame back to the first place (called carriage return, & lt; CR & gt;), and

Grep searches for the specified file type. grep cannot specify the file type, but you can use find to specify the file type. [Python] find-name & quot; * cpp & quot; | xargsgrep-eLoadLibrary-2 & gt; find_loaddllfind function: the directory's current

The difference between SecureCRT and SshClient in linux and windows is that SecureCRT does not have a graphical file transfer tool, but does not affect it. if you use commands to implement SecureCRT, it will be much easier and faster. First, you

Apachenginx commands for starting, stopping, and restarting apache in linux: Basic operation method: This document assumes that your apahce installation directory is usrlocalapache2, these methods are applicable to apahce startup commands in any

Permanent modification of the grub2 startup sequence grub2 determines the sequence of startup items through the file sequence in the etcgrubd Directory: [html] $ cdetcgrubd $ ls-l-rwxr-xr-x1rootroot6743 September 13 201200_header-rwxr-xr-x1rootroo

The shell auto-completion is often used to disable linux beep sound in the command line of LinuxUnix, but it also brings annoying beep sound, which is harsh. There are two ways to kill it: The first is to modify the configuration file to ensure that

When fork, source, and exec are used to run the script in fork mode, shell (parentprocess) generates a childprocess to execute the script. when childprocess ends, the difference between running scripts of parentpro fork, source and exec is returned.

Add users in linux and add keylinuxaddusersonghqmkdir ~ to users ~ Songhqsshechossh-dssAAAAB3NzaC1kc3MAAAEBAM0KaCsvPyxvB5fFVwDlpay5j + UrVq2IM87UAqjnlkXAf2cIzJgB5Yk7J5C1m7Npnyv40ZMm linux add users, add key linuxadduser songhqmkdir ~ Songhq/.

Ubuntu and centos firewall switch ubuntu: ufwdisable off ufwenable enable ufwallowsmtp allow external access 25 TCP (smtp) Port ufwallow22tcp allow access 22 TCP (ssh) Port ufwallowfrom17272103221 allow 22 ubuntu and centos firewall switch ubuntu:

Linux basic operations-file sorting, splitting, merging, archiving, and other 1sort1sort commands regard the input file as a data stream composed of multiple records, and the record is composed of fields of variable width, the basic format of the

For details about SUID and SGID in Linux, if you are still confused about SUID and SGID, please refer to them! Users often encounter SUID and SGID concepts in UNIX, and SUID and SGID are related to system security, so users are also concerned about

The SCP command sets a password-less job on jenkins today, you need to copy the file to a remote machine and think of the frequently used scp command. However, this command is convenient, but requires a password. How can I use this command in the

Install OpenSSHServer in Ubuntu to allow remote connection to ssh: connecttohost192168XXXXport22: onrefusedubuntu to install OpenSSHServer so that it can be remotely connected without OpenSSHServer: $ install OpenSSH Server in ssh Ubuntu so that it

Use screen shared sessions (multiple computers can be used to share windows and then -- meetings, teaching, etc.) GNUScreen can be seen as the command line interface version of the window manager. It provides a unified interface for managing

In Linux, Login and Logout are the first processes you encounter when using a Linux system. this is correct for using terminals and using Linux over the network. But the login process itself is not what you see on the terminal, what you see is

In linux, how to re-configure (or remove configure files) in linux requires the configure command before installing the source code software. Sometimes you need to reconfigure configure after configure. in this case, you need to perform some

Proftpd installation configuration instance: one proftpd installation configuration instance. Purpose: install and configure a proftpd to meet the following requirements: 1 anonymous access is not allowed. 2. open an account and only have the upload

View SELinux status: 1./usr/sbin/sestatus-v # if the SELinuxstatus parameter is enabled, SELinuxstatus is enabled: enabled2, getenforce # You can also use this command to check and disable SELi... "/>