After saving the file, open the terminal and execute the source FileName.sh command to run the bash script file. Note that the following conditional commands can be used to check and create a folder if it does not exist in bash. Using if Statement The if conditional statement tests whether...
if [ -e "/path/to/file" ]; then echo "File exists." else echo "File does not exis...
The test command also has a logical "not" operator, which can get a TRUE answer when you need to test whether a file does not exist. Check if the file exists Run one of the following commands to check if the file exists: Check if the directory still exists ...
/bin/bashFILE=$1if[ -f$FILE];thenecho"File$FILEexists."elseecho"File$FILEdoes not exist."fi 如何仅检查文件不存在? test命令(这里写作[)有一个 "not" 逻辑运算符,即感叹号!: if[ ! -f /tmp/foo.txt ];thenecho"File not found!"fi
即, 无论$dir$name存在与否,file$dir$name的状态返回值都将是0, 即表示成功 所以不能使用file命令来判断文件是否存在. manfile 返回值项如下: RETURN CODE file returns 0 on success, and non-zero on error. If the file named by the file operand does not exist, cannot be read, or the type of...
if [[ -f "$FILE" ]];then echo "$FILE exist" fi 如果要根据文件是否存在执行不同的操作,只需使用if / then结构: FILE=/etc/resolv.conf if [ -f "$FILE" ];then echo "$FILE exist" else echo "$FILE does not exist" fi 注:在处理名称中包含空格的文件时,请始终使用双引号以避免出现问题。
echo"ok"elseecho"file not exist"fi 例4:输入当前文件夹的一级子目录中文件名字 代码语言:javascript 复制 #将ls的结果保存到变量CUR_DIR中CUR_DIR=`ls`# 显示ls的结果 echo $CUR_DIRforvalin$CUR_DIRdo# 若val是文件,则输出该文件名if[-f $val];then ...
Check if file does not exists if [ ! -f /tmp/users.txt ]; then echo "File not found" fi Parameterize file name in script to check if file doesn’t exist filecheck.sh #!/bin/bash FILEPATH=$1 if [ ! -f "$FILEPATH" ]; then ...
[!-f/etc/docker]&&echo"$FILEdoes not exist" 检查是否存在多个文件 您可以使用-a(或&&与[[)测试是否存在多个文件,而不是使用复杂的嵌套if / else结构: FILE=/etc/dockerif[-f/etc/resolv.conf-a-f/etc/hosts];thenecho"$FILEis a directory"fi ...
TestFile1 does not exist or is empty. 向文件添加一些内容,然后再测试一次: [student@studentvm1 testdir]$ File="TestFile1" ; echo "This is file $File" > $File ; if [ -s $File ] ; then echo "$File exists and contains data." ; else echo "$File does not exist or is empty." ...