man manual content export to file
Usually when the terminal command exports files, we will use >, >>. > : overwrite mode >> : append mode Example: Sometimes, however, export files...
linux grep command – grep multiple patterns
The last article 《grep or condition, grep and condition》 introduced grep and, or use, including the use of the -e parameter. Here is a detailed...
grep show lines before and after
Usually when searching for keywords, we need to look at the keyword context information, all of which use -A, -B and -C parameters. Show num...
linux grep or , grep and , grep not condition examples
Linux grep conditional; Grep OR:
1. Use regular, grep -E "[A|B]";
2. Use -e，grep -e "A" -e "B"; Grep AND:
Use pipe,...
awk NR FNR difference
Linux awk command can use variables NR and FNR to process multiple files. NR : ordinal number of the current record, multiple files self-increase FNR...
Efficient meeting
We often have meetings to communicate during the development of the project, so it is very important to have an efficient meeting. Today, let’s discuss...
Internet Project Organization Structure And Project Flow
1. Project Organization Structure 2. Project Flow...
How to be financially free
Financial freedom can be said to be the dream of all people. What is financial freedom? Financial freedom generally means having enough savings, investments and...
mac php nginx mysql
As a back-end development, you often use a local development environment. Here I install the php + nginx + mysql development environment through the mac...
mac homebrew
As a loyal fan of Linux system, I have used Ubuntu and Centos, apt package management and Yum package management, which are very convenient. After...
AWK tutorial: awk sort uniq
In daily development, we often use awk command to cut and sort log file columns and count them. awk sort uniq count example awk column...
linux grep regex examples
Grep regex matches the search content according to the specified rule pattern, which can help us find the content we need precisely. Syntax: grep -E...
AWK tutorial: split on character awk or cut
In the previous article, we introduced the use of linux awk for string cutting. Here we introduce a method. use awk -F parameter use awk...
AWK tutorial: awk [-F] print example
- awk print last field
- print line number per line
- print specific columns
- use -F specifies a delimiter...
AWK tutorial: awk remove last character
awk remove last character use awk length and substr functions...