Question: Port 8080 cannot be accessed
Solution:
The first step is to check whether the Alibaba Cloud port is open
Network Security>Security Group>Configuration Rule>Add Incoming
Category: Linux
Linux is a free-to-use and freely disseminated Unix-like operating system. It is a multi-user, multi-tasking, multi-threaded and multi-CPU operating system based on POSIX and UNIX. It can run major UNIX tools, applications, and network protocols. It supports 32-bit and 64-bit hardware. Linux inherits Unix’s network-centric design philosophy and is a multi-user network operating system with stable performance.
LINUX file, directory and file system backup and recovery related commands
1. Common compression instructions in Linux systems Common compressed file formats in Linux systems:
Common options:
For example:
(1) Compression:
[[email protected] ~]# cp /etc/
Linux (10) – Upload and download with RZ and SZ command
Take the CentOS 7 system as an example. Generally, upload and download use third-party tools, but it is not convenient to operate. You have to find the corresponding directory every time to perform
linux-history-ps1-1
1. Serial Port Terminal (/dev/ttySn)
Serial Port Terminal (Serial Port Terminal) is a terminal device that uses a computer serial port to connect. The computer treats each serial port as a charact
Varnish configuration reverse proxy server
Step1: download the source code
[[email protected] ~]# git clone https://github.com/varnishcache/varnish-cache
Step2: install
[[email Protected] ~]# cd varnish-cache/
[[emai
[Linux] GET OPT_Long
Use of command-line parameter functions under linux
//912Vfr ?h==> -9 -1 -2 -V -f -r //t: p: c:==> -t 100 should be followed by the option A parameter//If it is a letter followed by two colon
Linux foundation
Help command:
1.man [parameter] command, open help manual
1. Command: Man 1 CD, CD, CP, MV, Printf 2. System call: man 2 system function, fork() process
3. C language library function: man 3
Flow editor SED
Sed introduction Sed is a stream Editing tool, used to filter and replace text, especially when you want to make unified changes to dozens of configuration files, you will feel the charm of Sed! Se
Linux Hospital Kafka
kafka is a distributed message queue. With high performance, persistence, multiple copy backup, horizontal expansion capabilities. The producer writes a message to the queue, and the consumer fetch
SED a stream editor
Introduction Sed uses a stream editing mode:
The most obvious feature is that before sed processes data, it needs to provide a set of rules in advance. sed will edit the data according to this rul