I want to delete a line: this is an example, it appears multiple times in the file. What should I do?
Thank you,
AI Lisa
:g/This is an example/d
I want to delete a line: this 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 string stitching
test.sh
#!/bin/bash
your_name=”runoob”
# Use double quotes to splice
greeting=”hello, “$your_name” !”
greeting_1=”hello, ${your_name} ! ”
echo $greeting $greeting_1
# Use single quotes
SHELL variable foundation detailed
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Use of the function in the shell
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Mariadb Windows installation
1. Copy the installation file to the server < /p>
[client]
port=3307
[mysql]
default-character-set=utf8
[mysqld]
port=3307
#Program installation directory
basedir=E:/mariad
Regular expressions – Shielding strings in Perl using mask strings
I have a string like’xxox-x’, and I want to block every line in the file as follows:
> x Ignored (or just set to a known value)
> o stay the same
> – is a variable length field that can keep
Bash or Python for changing file spacing
I have a set of 10,000 files. In all of them, the second line looks like:
AAA 3.429 3.84 So there is only one space between AAA and the other two columns (required). The rest of the lines on
Regular expression – how to search for six letters with letters in alphabetical order
I recently created a Perl script to search for words starting with D and E with the following code:
$infile =’words.txt’;
open(IN, $infile);
$count = 0;
while ($word = ) {
chomp($word );
if (
Self-built NuGet package
Some internally used components, unified management, automatic upgrade.
1. Create an empty asp.net Web project, add a reference to NuGet.Server, and publish this website to IIS. 2. Install NuG
Shell script writing code
Now centos7 is using the bash software, you can view the bash version through the following command:
[[email protected] ~]# cat /etc/redhat-release #View the system version
CentOS Linux rele