注意:因为这两个文件都存在于系统中,并且“New_File.txt”比“Old_File.txt”更新 “ 让我们看一个例子“检查文件是否不存在”: 创建一个名为“Check_Exist.sh”的文件 ” 并在其中编写以下脚本 #!/bin/bash # using ! before -f parameter to check if # file does not exist if [[ ! -f "GFG....
FILE=/etc/dockerif[!-f"$FILE"];thenecho"$FILEdoes not exist."fi Copy 与上述相同。 [!-f/etc/docker]&&echo"$FILEdoes not exist." Copy 检查是否有多个文件存在 你可以使用-a(或&&与[[)来测试是否存在多个文件,而不是使用复杂的嵌套的if/else结构。 if[-f/etc/resolv.conf-a-f/etc/hosts];...
-u filename - Check if file set-user-id bit is set -w filename - Check if file is writable -x filename - Check if file is executable How to use: #!/bin/bash file=./file if [ -e "$file" ]; then echo "File exists" else echo "File does not exist" fi A test expression ...
if [[ -e "/path/to/file" ]]; then echo "File exists." else echo "File does not ...
[-f/etc/resolv.conf]&&echo"$FILEexist"||echo"$FILEdoes not exist" 检查目录是否存在 运算符-d允许您测试文件是否是目录。 例如,要检查/etc/docker目录是否存在,您将使用: FILE=/etc/dockerif[-d"$FILE"];thenecho"$FILEis a directory"fi
Check if File Exists Check if Directory Exist Check if File does Not Exist Check if Multiple Files Exist File test operators Conclusion Share: When writing Shell scripts, you may find yourself in a situation where you need to perform an action based on whether a file exists or not. In Bas...
#!/bin/bash if [ -f "$1" ]; then echo "文件存在" else echo "文件不存在" fi 在上面的脚本中,$1表示第一个命令行参数,即文件路径。通过-f参数判断文件是否存在,如果存在则输出"文件存在",否则输出"文件不存在"。 使用示例: 代码语言:txt 复制 $ bash check_file.sh /path/to/file.txt 文件存...
Note:If you need to check if a directory/filedoes not existyou can just add thenot logical operator(!) inside the[operator. For example:if [ ! -d "$directory" ]. Method 2: ThetestCommand To use thetestcommand to check if a directory exists in Bash, you can use the following syntax...
if [[ - f <file 1> ]] && [[-f <file> ]] then echo "file exists!" fi. Easy! Make sure to remember the “-f” command and file name you’re looking for. Check if a File Does Not Exist The next one you’ll need to learn is to check if a file exists no more. The comm...
I have a bash program that will write to an output file. This file may or may not exist, but the script must check permissions and fail early. I can't find an elegant way to make this happen. Here's what I have tried. set +e touch $file set -e if [ $?...