Shell

 operate the database directly in the ADB shell using the sqlite3 commandIn general, mobile phones in the development phase will be the Sqlite3 module into the mirror. For example, in Android 5.1, the path is/system/xbin/sqlite3. (But for ordinary

We can always see the log log content of the program is full of screens in the Android development, and the information that really makes sense to the developer is submerged in the torrent, so that the developers are at a loss and seriously affect

File Management class commandsLsView: Cat tac more less head tailCopy: CP-R: Recursive-I: Hints, interaction-F: Forced override-A: Keep all file information-D: When the source is a linked file, the link itself is copied instead of the source file-P:

The shell can often be seen: >/dev/null 2>&1 Eg:sudo kill-9 ' ps-elf |grep-v grep|grep $1|awk ' {print $4} ' 1>/dev/null 2>/dev/null The result of the command can be defined in the form of a%> output/dev/null represents an empty device

Background: Shell scripting is an essential tool for Linux OPS, and it is important to install shell scripts as a service and join the system to start and then manage them using services.When we run the command to install the service, assume that

1, the basic concept (this is the premise of understanding the knowledge behind, it must be understood)A, I/O redirection is usually related to FD, the Shell's FD is usually 10, namely 0~9;b, there are 3 commonly used FD, for0 (stdin, standard input)

Bash An arbitrary code run vulnerability exists in the environment variable: "A CGI request can cause remote code to run, causing the server to be compromised." Serious harm . and the official release patch was also bypassed " ,"Vulnerability

This article is sponsored by Ilanniweb, starting in Slime Line the worldWant to get more articles, you can follow my ilanniwebThe company's business is to use Tomcat as a Web container, in order to more effectively utilize server performance, we

In the process of writing shell scripts, we often customize some functions and execute the corresponding process according to the function's return value, so how do we get the return value of the function?There are two ways to call a function in the

The logical operators of the shell involve the following types, so as long as the appropriate choice, can solve our many complex judgments, to achieve a multiplier effect. first, the logical operator Logical Volume Label

Shell Determines whether a file exists1. Shell to determine the file, whether the directory exists or has permissions2. #!/bin/sh3.4. Mypath= "/var/log/httpd/"5. Myfile= "/var/log/httpd/access.log"6.7. # the-x parameter here determines whether the

4. Input and output#! /bin/bash# Read users input and then get his nameread"Please input your first name: " firstNameread"Please input your last name: " lastNameecho-e"Your full name is: $firstName $lastName"Read how to use:read[-ers][-a 数组][-d

General modifications two places can solve this annoying problem1. Echo $TMOUTIf blank is displayed, it means that there is no setting, equal to using the default value of 0, and should normally not time out. If it is greater than 0, you can set it

http://blog.csdn.net/jizhongchun/article/details/8519413Guide: I am a chrome Fans. Recently found a Google official out of the SSH plugin- Secure Shell ( The current version is 0.8.8). Over here.With:1 downloads.Download the extension to Google

From the programmer's point of view, the shell itself is a program written in C language, from the user's point of view, the shell is the user and the Linux operating system communication Bridge. The user can either enter command execution or use

Linux gets time in the shellGet the date of the dayDate +%y-%m-%dOutput: 2011-07-28Assigns the current date to a date variabledate=$ (Date +%y%m%d)Sometimes we need to use dates before or after today, so we can use the-D parameter of dateGet

awk ProgrammingAwk is a programming language. Gawk, is the latest version, the current Linux version is used Gawkawk is a soft link to gawkhow awk works BEGIN #在未读取文件行之前执行Primary input loop, which executes repeatedly until the terminating condition

This is the shell command and command execution, the article commands here to download Command command execution, the previous one is the shell variables, condition judgments, control structures and functions, the previous section on what is Shell,

Conditional judgment----Use if ... then----multipleIn the judgment of the same data, what should be done if the data needs to be judged in many different ways? For example, in the sh06.sh script above, we just have to make a $yn judgment (only once

(1) Definition of an array[Email protected]:~# a= (1 2 3 4)[Email protected]:~# echo ${a[1]}2[Email protected]:~# a[0]=1[Email protected]:~# a[1]=2[Email protected]:~# echo ${a[0]}1(2) Array worth acquiring[Email protected]:~# var[0]=1[Email