statement2; }if(expression) { statement1; }elseif(expression1) { statement2; }else{ statement3; } 统计某个文件夹下的文件占用的字节数,过滤4096大小的文件(一般都是文件夹): ls-l |awk'BEGIN {size=0;print "[start]size is ", size} {if($
https://tldp.org/LDP/abs/html/awk.html 鳥哥的 Linux 私房菜awk https://linux.xgqfrms.xyz/linux_basic/1010index.htm https://linux.xgqfrms.xyz/linux_basic/0330regularex.htm#awk AWKTutorials awk 语法 https://www.runoob.com/linux/linux-comm-awk.html $ awk [选项参数]'script'var=value file(...
intermediate awk 脚本指南【Linux-Command line】 了解如何将命令构造为可执行脚本。 本文探讨了awk的功能,它们更简单易用,只要你知道如何将命令结构化为可执行脚本。 逻辑运算符和条件 你可以使用逻辑运算符“and”(写作“&&”)和“or”(写作“||”)为条件添加特异性。 例如,要选择和仅打印第二列中具有字符串...
The awk command in Unix/Linux is a powerful and versatile text-processing tool used for manipulating and processing text or data files. Named after its creators—Alfred Aho, Peter Weinberger, and Brian Kernighan—awk is designed to operate on data either from files, standard input, or through ...
linux系统之文本格式化工具awk 一、文本处理工具 grep、sed和awk都是文本处理工具,虽然都是文本处理工具但却都有各自的优缺点,一种文本处理命令是不能被另一个完全替换的,否则也不会出现三个文本处理命令了。只不过,相比较而言,sed和awk功能更强大而已,且已独立成一种语言来介绍。
The command provides basic control flow statements (if-else,while,for,break) and also allows users to group statements using braces{}. if-else Theif-elsestatement works by evaluating the condition specified in the parentheses and, if the condition is true, the statement following theifstatement ...
if ($1 > 30) { x = $1 * 3 print x } else { x = $1 / 2 print x }}' testfile Or type them on the same line and separate the if statement with a semicolon like this: While Loop You can use the while loop to iterate over data with a condition. ...
八 控制语句：8.1 if-else语法：if (condition) {then-body} else {[ else-body ]}例子：awk -F: '{if ($1=="root") print $1, "Admin"; else print $1, "Common User"}' /etc/passwdawk -F: '{if ($1=="root") printf "%-15s: %s\n", $1,"Admin"; else printf "%-15s: %s...
The command above actually works as follows: First, it checks whether the quantity, fourth field of each input line is less than or equal to20, if a value meets that condition, it is printed and flagged with the(*)sign at the end using expression one:$4 <= 20 ...
1 awk -F: '{if($3>=5){printf "%-10s%s\n",$1,$3}}' ceshi.txt while循环 while(condition){statements} 1 echo {1..10} |awk '{n=1;while(n<=NF){if($n%2==0){print $n,"oushuo"}else {print $n,"jishu"};n++}}' do-while循环 for循环 1 awk BEGIN'{for(i=1;i<=1000...