Shell

In the previous. Net encryption principle, the implementation of the method body's encrypted information ing describes the basic problems to achieve the encryption shell,This article introduces how to implement an encrypted shell kernel of the pure

1. login and logout Tty1 ~ is enabled by default in Linux ~ Seven tty7 terminal interfaces, 1-6 text terminals and 7 graphics Terminals Use CTRL + ALT + F1 to switch Remote login: Method 1: SSH-l account host name or IP address Method 2: SSH

Shell can be extended, shell ExtensionProgramThe following functions can be implemented. ◇ Specific file type, all file types, network neighbors, recycle bin, drive, network shared folder, printer, disc drive, directory, folder background (

Wandering on the Cu, you can see a person's personal signature :() {:|:Echo 'ten people | day 1 | ten dozen o' | SED's/.../& \ n/G' # Haha, I tried it on my own machine. See all the posts I 've mentioned.CrashNow (Linux is probably used), there

3. Route 1) route [-nee] ROute add [-net |-host] [domain or host] netmask [mask] [GW | Dev] Route del [-net |-host] [domain or host] netmask[Mask] [GW | Dev] 2) Option ①-N: not usedProtocolOr host name, directly using IP or port number; ②-

1. ChildProgramOnly the environment variables of the parent program will be inherited, And the subroutine will not inheritDefinitionVariable. Custom variables: declare them as environment variables through export Convert environment variables to

Parentheses The parentheses structure can force the command to run in the sub-shell. Its basic format is: ( Command 1 Command 2 ... Command n ) The N commands in parentheses are run in the sub-shell. After bash version 3, the internal

1. Description /Sbin/ldconfig-configure dynamic linker Run-Time Bindings Ldconfig Option 2. Option 1)-P: indicates that ldconfig prints the names of all the shared libraries saved in the current cache file. 2)-V: ldconfig displays the

1. Tail-output the last part of Files Tail [Option] [+/-num]... [file]... 2. Option ①-F,: Output appended data as the file grows; ②-S,: With-F, sleep for S seconds (default 1.0) between iterations. ③-N,: output the last n lines, instead of

1. FTP automatically logs in to batch download files. ##### From/home/data on the FTP server to the local/home/databackup #####! /Bin/bashFTP-n Open 192.168.1.171User guest 123456.BinaryCD/home/DataLCD/home/databackupPromptMget *CloseBye!2. FTP

Http://rimuhosting.com/howto/profile.jsp   Linux Shell environment setup using/etc/profile. d /*   When a user logs in, environment variables are set from various places. That between des: /Etc/profile (for all users ). Then all the

Original article link Abstract: string processing in Shell Processing strings Including: intercept, connection, match, replace, flip ...... One day accumulated! String processing: 1. truncate Method 1: Echo $ A | awk '{print substr (, 1, 8 )

## Check the PID of such program#Checkpid (){If [-z "'ps X | grep $1 | grep-V grep | grep-V $0 | awk '{print $1}'' "]; thenEcho "the $1 program cant run well ."Fi}       Simple Description: PS reportProgramStatus. Ps x shows all programs,

1. Count the total number of rows of all common files in a directory # Practical scenarios: when designing a graduation project, you need to calculate your ownCodeNumber of rows # Solution 1:Find.-Type F-name"*. C"-Exec cat {}\; | grep-V'^ $'|

Replace file1 with the actual file as follows 1. query the row number of the empty row in file1.Grep-n "^ $" stl_stable_sort.ccRefer:Common grep commands 2. query the rows ending with ABC in file1.Grep-n "^. * ABC $"

Before scripts runs, the most feared problem is the syntax error! So how can we debug it? Is there a way to determine whether there is a problem without directly running the scripts? Haha! Of course! Let's take the bash-related parameters for

1. Description Report a snapshot of the current processes. PS [Options] 2. Common options ①L long format output; ②U displays processes in the username and start time order; ③J. display processes in the task format; ④F process is

1. Expression writing: [2] Regex_ip = "(2 [0-4] [0-9] | 25 [0-5] | 1 [0-9] [0-9] | [1-9]? [0-9]) (\. (2 [0-4] [0-9] | 25 [0-5] | 1 [0-9] [0-9] | [1-9]? [0-9]) {3 }" It means (0-255) (point 0-255) 3 times Echo "123.1.1.1" | grep-e "$ regex_ip"

7. grep family:1. grep exit status:0: indicates successful;1: The matching pattern cannot be found in the provided file;2: The file provided in the parameter does not exist.See the following example:/> Grep 'root'/etc/passwdRoot: x: 0: 0:

When accessing the ps1 file, be sure to check whether the access path contains spaces. Spaces must be enclosed in single quotes.   PowerShell-command Set-ExecutionPolicy "Bypass" set filepath = '% CD % \ AppDeployment. ps1 'powershell-command "& %