To check if a file is empty in a Bash script, you can use the "-s" test, which returns true if the file exists and has a size greater than zero. If you want to check if a file is empty, you would use the "!" (not or negate) operator with "-s" to negate the test. Here...
/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 ....
filename="bashfile.sh" size_threshold=1 # Check if file exists if[-e"$filename"] then # Get file size in bytes file_size=$(wc-c<"$filename") # Check if file is empty if["$file_size"-gt"$size_threshold"] then echo"File exists and is not empty" ...
If [ ! -s 1] ;then Yes | rm 1 Else Echo “the file is not empty!” Fi Exit 0 执行:./x.sh t.txt(t存在且不空)功能是:___ 相关知识点: 试题来源: 解析 判断文件 .txt 是否为空 反馈 收藏
function istxt($txt) { $content = @file_get_contents($txt); if ($content === f...
shortcut. Coming back to the terminal, we are using the Bash instruction to run this Bash file, i.e., empty.sh. On execution, it returns “Empty” because the string “str” is initialized empty in the code, and the “then” part of the “if-else” statement has been executed so ...
TestFile1 does not exist or is empty. 现在创建一个空文件用来测试: [student@studentvm1 testdir]$ File="TestFile1" ; touch $File ; if [ -s $File ] ; then echo "$File exists and contains data." ; else echo "$File does not exist or is empty." ; fi ...
shell 编程中使用到得if语句内判断参数 –b 当file存在并且是块文件时返回真 -c 当file存在并且是字符文件时返回真 -d 当pathname存在并且是一个目录时返回真 -e 当pathname指定的文件或目录存在时返回真 -f 当file存在并且是正规文件时返回真 -g 当由pathname指定的文件或目录存在并且设置了SGID位时返回为真 ...
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...
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 ...