/bin/bash[-snewFile.txt ] &&echo"file has something"||echo"file is empty" 该命令等同于我们之前使用的命令。 我们还可以使用test -s命令查找给定目录中的所有空文件: #!/bin/bashforfilein*.txt;doif[ !-s$file];thenecho$file;fi;done 上述命令将打印目录中所有空 .txt 文件的名称。 只需将 ....
How to Check if File exists and is Empty in Bash When working with shell scripts, it’s important to be able to check if a file exists and if it’s empty or not. This is especially useful when automating tasks that rely on specific files being present and non-empty, here is an exam...
ENfunction istxt($txt) { $content = @file_get_contents($txt); if ($content ===...
echo "$a : The string is not empty" else echo "$a : The string is empty" fi 结果 abc = efg: a != b -n abc : The string length is not 0 abc : The string is not empty 文件测试运算符 实例: #!/bin/bash file="/home/shiyanlou/test.sh" if [ -r $file ] then echo "The ...
shortcut. Coming back to the terminal, we are using the Bash instruction to run this Bash file, i.e., empty.sh. On execution, it returns “Empty” because the string “str” is initialized empty in the code, and the “then” part of the “if-else” statement has been executed so ...
printf'\n'if[-d~/];then echo'~/ is a directory'elseecho'~/ is not a directory'fi -f即判断是否为file, -d即判断是否为directory, 输出结果: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 +'['-f/Users/yjmyzz/.bash_profile']'+echo'~/.bash_profile is a file'~/.bash_profile ...
File/usr/bin/boot.ini exists 请参阅之前的文章以了解各种bash if 语句类型。 Bash 示例 2. 比较数字 下面的脚本从用户那里读取两个整数,并检查这两个数字是否相等或大于或小于彼此。 $ cat numbers.sh #!/bin/bash echo"Please enter first number"read first ...
1. Check if file exist using test command in LinuxThe test command has the following syntax:test EXPRESSIONThe test command is generally used for evaluating any expression and then execute something based on the results.But how I know the status code with that command exited? Just run the ...
All the code snippets are written in the MyScript.sh file, while the dummy.txt file contains some sample data we used in our scripts. Using -q Option with grep Use the -q option with grep to check if the grep command result is empty. Use -q Option with grep in MyScript.sh 1 2...
TestFile1 does not exist or is empty. 现在创建一个空文件用来测试: [student@studentvm1 testdir]$ File="TestFile1" ; touch $File ; if [ -s $File ] ; then echo "$File exists and contains data." ; else echo "$File does not exist or is empty." ; fi ...