I'm creating a very simple bash script that will check to see if the directory exists, and if it doesn't, create one. However, no matter what directory I put in it doesn't find it! Please tell me what I'm doing wrong. Here is my script. #!/bin/bash $1="/media/student/System...
在开发过程中,我们经常需要检查文件是否存在,以确保文件在使用前已经存在。在 Bash 和 TypeScript 中,都提供了针对文件存在性的相关方法。 Bash 在Bash 中,我们可以使用test命令或者它的简写形式[来检查文件是否存在。 if test -f /path/to/file; then echo "File exists" else echo "File does not exist" ...
所以不能使用file命令来判断文件是否存在. manfile 返回值项如下: RETURN CODE file returns 0 on success, and non-zero on error. If the file named by the file operand does not exist, cannot be read, or the type of the file named by the file operand cannot be determined, this is not be ...
-u filename - Check if file set-user-id bit is set -w filename - Check if file is writable -x filename - Check if file is executable How to use: #!/bin/bash file=./file if [ -e "$file" ]; then echo "File exists" else echo "File does not exist" fi A test expression ...
要从Bash脚本检查程序是否存在,可以使用以下方法: 1. 使用 `which` 命令: ```bash if [ "$(which program_name)" != "" ]; then ...
elif [ ! -e "$FILE" ]; then echo "The file does not exist." else echo "The file exists and is not empty." fi So, what is this script doing? The code [ -e "$FILE" ] checks if the file exists, then [ ! -s "$FILE" ] checks if the file is not of size greater than ...
The script first checks if the/my-dirdirectory exists. If it does, a message is printed to the console. If the/my-dirdirectory does not exist, a message is printed and the/my-dirdirectory is created using themkdircommand. Note:If you need to check if a directory/filedoes not existyou...
Example 3: File Check #!/bin/bash file_path="/path/to/file.txt" if [ -f "$file_path" ] then echo "File exists." else echo "File does not exist." fi Compound Condition You can combine multiple conditions using logical operators like && (AND) and || (OR). Here’s an example:...
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 command is easy to learn and remember. Using Bash script, use the “!” symbol and follow it with the “-f” option, and the file you’re trying to check. ...
#!/usr/bin/env bash # File: vars.sh echo "Script arguments: $*" echo "First arg: $1. Second arg: $2." echo "Number of arguments: $#" 现在,让我们尝试以几种不同的方式运行脚本:wingsummer@wingsummer-PC ~ → bash vars.sh Script arguments: First arg: . Second arg: . ...