Question requirements Count the number of numbers that appear in each line of the document a.txt and calculate how many numbers appear in the entire document. For example, the content of a.txt is a
Category: OS
Operating System (Operating System, referred to as OS) is a computer program that manages and controls computer hardware and software resources. It is the most basic system software that runs directly on the “bare metal”. Any other software must be supported by the operating system to run .
Shell script – loop
1. The writing method of for statement based on C language format:
for((i=0;i<10;i++)); do【for (initial conditions ; Conditional judgment statement; Value change statement); do】
loop bo
UNIX foundation day_01
unix operating system
why? Choose an operating system according to user needs
Individual users: windows
Enterprise users: do server-side (website) development
Server-side requirements :
1) Secu
Shell script PPT script
SHELL Script PPT script Write in it on the premise that it can be used
1, determine the type of all files in the /var/ directory
[[email protected] scripts]# cat filetype.sh
#!/bin/ba
8_InlineHook
1 shellcode low 2Gb warning , Should use high 2GB stable: inkernel hook: Because the low 2gb data of each process is different; therefore, the code should be placed at the high 2gb in the kernel h
Shell script TestSrv script (init script or sysv script)
testsrv script (SysV script) I. Description: ? CentOS7 already uses Systemd to manage services, and it is recommended to use Systemd to manage services. ubuntu18.04 is now also a Systemd management
Windows – How to Retrieve Heat Output (WXS) in WIX (Command Line)
I am using heat.exe to generate .wxs files to include the files in my main installer. I have two questions:
I Which switches will be used to register the DLL?
After generating the outpu
Regular expression – the best modern text parsing? When is AKA to use Lex and Yacc?
I have commands and parameters for inputting text blocks, one per line, such as
XYZ ARG1,ARG2,ARG3, …, ARGN I want to verify whether the parameters of XYZ are applicable to that particular
Shell script 8-19
Common logical statements
1, for statement:
for variable in list; do
Loop
done
for((初始语句; 判断语句; 值变化语句)); do
Loop
done
case statement:
2, case variable in
PAT1)
Regular expression
Regular Expression (Regular Expression) is a very powerful tool for string retrieval, filtering, and replacement operations. It is often used in daily work. There is a need to find a string that me