Example 02: Check If Directory Exists Let’s take a look at the code that is used to check if the directory of the folder exists in our system or not. For that, we will be using a purely new folder. Therefore, within the terminal shell query area, we have tried the “mkdir” comma...
As you can see, I am performing two checks. The first check is to make sure that the Neovim configuration directory exists or not. I intentionally added the logical NOT operator (!) to make the condition opposite. This is me saying "I am only concerned if the directorydoes not exist". ...
We are checking if the given file exists or not. Since there is the negation (!) operator and as the directory doesn’t exist, it will execute the then block of the code. This will enable the touch command to execute which will create the file. If we don't want the modification time...
Check if a Directory Exists in Bash To check if adirectoryexists, switch the-foption on thetestcommand with-d(for directory). For example: test -d /tmp/test echo $? The output is1, which means that the directory doesn't exist. Create the directory using themkdir commandand rerun the ...
if test –d ~/tmp then echo “the directory already exists” else mkdir ~/tmp fi 试说明该代码段主要实现了什么功能?相关知识点: 试题来源: 解析 答:该代码段主要实现的功能为:判断用户主目录下的子目录tmp是否存在,并根据判断结果做出如下处理: 存在: 显示“the directory already exists” 不存在: 建立...
The flag -d allows you to test whether a file is a directory or not. For example, to check whether the /etc/docker directory exists, you would use:FILE=/etc/docker if [ -d "$FILE" ]; then echo "$FILE is a directory." fi Copy ...
- Test if the specified [d]irectory exists: [[ -d path/to/directory ]] - Test if the specified file or directory [e]xists: [[ -e path/to/file_or_directory ]] 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13.
'No such file or directory' error in bash, but the file exists? up vote28down votefavorite 11 On Ubuntu, I get a 'No such file or directory' error when I try to execute a command. I have checked with ls -la , the file adb is there and it has 'x' flag So why I am gettin...
-lt 小于,如:if [ "a"−lt"b" ] -le 小于等于,如:if [ "a"−le"b" ] < 小于(需要双括号),如:(("a"<"b")) <= 小于等于(需要双括号),如:(("a"<="b")) > 大于(需要双括号),如:(("a">"b")) >= 大于等于(需要双括号),如:(("a">="b")) ...
if (dir.exists("my_test_folder")) { print("The direcoty exists") } else { print("The file does not exist") } We get: [1] "The direcoty exists" Now, let’s do the following exercise. We will check if the directory exists and if not, then we will create a new one...