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How to use tmux 1. The role of tmux (1)It allows simultaneous access to multiple sessions in a single window. This is useful for running multiple command-line programs at the same time. (2) It allows new windows"Access"Session already exists. (3)It allows multiple connection windows per session, so multiple people can share the session in rea ...

1. return of saltstack component The return component can be understood as the SaltStack system stores or returns the data returned by Minion to other programs. It supports a variety of storage methods, such as MySQL, MongoDB, Redis, Memcache, etc. through return, we can record each operation of SaltStack and provide a data source for futu ...

From Chapter 5 of Linux Shell script introduction, a mess? No such thing! Parsing website data $ lynx -dump -nolist http://www.johntorres.net/BoxOfficefemaleList.html |grep -o "Rank-.*" | sed -e 's/ *Rank-\([0-9]*\) *\(.*\)/\1\t\2/' | sort -nk 1 > actresslist.txt 1 Keira Knightley 2 Natalie Portman 3 Monica Bellucci The website is ...

  man has nine volumes. System programming is the content of Volume II, and volume V is file format and specification open function Function prototype Parameter pathname file name Macro with parameter flags as access mode: o_ Rdonly (read only), O_ Wronly, O_ Rdwr (read write) these three must be added O_ Append, O_ Creat, O_ Excl ...

Reproduced from: Network Programming --- subprocess module, struct module, glue package, UDP protocol, socket_server module - Remaining person. - Blog Park Network Programming --- subprocess module, struct module, glue package, UDP protocol, socket_server module   Catalog subprocess modulestruct moduleSticky package Sticking prob ...

kubernetes core combat1. Resource creation methodCommand line creationyaml file creation2,namespaceNamespace is the organization mechanism provided by Kubernetes, which is used to classify, filter and manage any group of objects in the cluster. Each workload added to the Kubernetes cluster must be placed in a namespace.Namespace gives scope to ...

1. View the current user's home directory # Switch to Home Directorycd ~# View Home Directory Location pwd 2. Check whether the server is maliciously logged on # Ubuntu # 1. View recent successful password logins: grep "password" /var/log/auth.log | grep -v Failed | grep -v Invalid # 2. View recent login failures IP And each IP Number of fa ...

1. Arithmetic operator 1.1 introduction to operators The symbol used to splice variables or constants is called: operator, and the formula connected by operators is called: expression. We often use it in practical development For example: 10 + 3 is an expression, and the + sign is an operator Note: in Scala, operators are not only operator ...

      It is said that RT thread OS developed by Chinese people has been for some time and has not been tried. After all, learning a new platform takes a lot of time and energy. The main purpose of testing RT thread this time is to use its dynamic library function. Now the Cortex-M series Arm processor is very powerful. However, ...

1. Overview of extern "C" The main function of extern "C" is to implement other C codes in C++ code. The format is as follows: cplusplus is the default macro defined by the C + + compiler, and the code block part is the C language implementation code. Extern "C" instructs the compiler to compile this part of ...