Shell

To the shell (Reverse shell) is a technique for sending shell commands to a remote machine that becomes useful when the remote machine is behind something else, such as a firewall. You might say, "isn't a normal shell or a simple SSH channel going

Certificate Generation method in Apache+mod_sslThe certificate request is generated first: The code is as follows Copy Code #openssl req-new > SERVER.CSR After you follow the prompts to enter the relevant

The front end of the day before the colleague debugging function. The server is good, the simulated player login is good, in the countdown. At this time the sudden operation of the colleague came to say to count the number of server players, that is,

[Turn]http://www.knktc.com/2011/08/20/linux-shell-expect%e6%89%b9%e9%87%8fscp%e8%84%9a%e6%9c%ac%e5%b7%a5%e5%85%b7/ One of the most recent tasks in preparing a deployment is to send some files, such as installation packages, to a large number of

1, LS: Similar to the DOS under the dir command LS The most commonly used parameter has three:-a-l-F. Ls–a Files on Linux are treated as hidden files by the system, with the LS command is not visible to them, and with ls-a in addition to

One: The role of Shell and common types: The shell is a special application that is between the operating system kernel and the user, responsible for accepting the user-entered operation instructions (commands) and interpreting them, passing the

Introduction of API Store API store is an API aggregation platform that can provide a variety of data services to the outside, more representative of the Dev store, Baidu API store and aggregated data, and so on, such services through the provision

I. Shell special symbol, Cut command* Any character[Email protected] ~]# Ls/tmp/*.txt/tmp/1.txt/tmp/2.txt/tmp/q.txt[Email protected] ~]#？ Any one character[Email protected] ~]# Mkdir/tmp/test1[Email protected] ~]# Touch/tmp/test1[Email protected] ~]#

One, the basic Bash Shell command 1, the default bash shell prompt is the dollar sign ($); 2. The Bash manual uses the man command to access the manual pages stored on the Linux system, such as: Bogon:~ mac$ man Kill KILL (1) BSD

You can encapsulate the shell script code in a function so that it can be used more than once anywhere in the script.17.1 Basic Scripting functionsFunction: is a block of script code that can be named and reused anywhere in the code.17.1.1 Creating

Many programs and scripts use environment variables to obtain system information, store temporary data, and configure information.6.1 What is an environment variable:Bash Shell uses a feature called environment variable (environment variable) to

2.2.1, Shell Introduction (1) Shell can be understood as a software system to provide user operation of the command line interface, it can be said that he is a way of human-computer interaction (2) We can use the shell and the operating

2017 the latest enterprise face Test shell (i)**********************************************Enterprise Shell face question 1: Batch generate random character file name case ***********************************************Use the For loop to bulk

1. Single quotation mark (')grep403-212-4921212-234-2343If we're looking for Susan Goldberg and can't use the grep Susan Goldberg Phonebook command directly, GREP will treat Goldberg and phonebook as files that need to be searchedgrep ' Susan Gold '

Multiple Command execution methods:Script composition;1.shengbang2.#3. Blank lines-lines with no content, only white space characters or tabs (tab)4. Logical JudgmentShell script Programming:1. Execute permission to invoke the script through the

This article goes from http://www.kissyu.org/backgroundWe can often find such statements in a shell script >/dev/null 2>&1 . Before I did not go into the role of this command, copy replicable, until last week I wrote this order accidentally 2>&1

Variable names can only contain numbers, letters, and underscores, because some variables that contain other characters have special meanings, and such variables are called special variables.For example, $ represents the ID of the current shell

It's all the same, it's quitting, just returning this 0 and 1 is the error or the correct code to return to the operating system.Exit 1 refers to the return value that the script runs to indicate success or failure, and the reason for the

To become a flexible tool, a qualified script must provide additional information to describe the role of the script, how it is executed, and where it is executed. Like the command, the script also uses parameters. Switches and parameters increase

1. PS1: (set the prompt character) This is interesting. You can customize your own prompt; Every time we press the [enter] key to execute a command, the prompt character will appear again, and we will take the initiative to read the variable