Navigate to a directory where your hello_world.sh is located and make the file executable: $ chmod +x hello_world.sh Now you are ready to execute your first bash script: ./hello_world.sh 2. Simple Backup bash shell script #!/bin/bash tar -czf myhome_directory.tar.gz /home/linuxconf...
问:在 Bash shell 脚本中什么命令检查某个目录是否存在?...答:要检查目录是否存在,请执行以下操作: if [ -d "$DIRECTORY" ]; then echo "$DIRECTORY does exist." fi 一行代码的形式则如下: [...要检查目录是否不存在,请执行以下操作: ...
某shell程序段如下: #!/bin/bash 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 ...
How can you determine if a directory is not empty on a remote machine using shell script? To only check the directory and not its subdirectories recursively, use Solution 1. To accomplish this, you can use the given command to print the path of the directory if it's empty; check if th...
拖入浏览器,方可跳转到指定锚点 https://www.gnu.org/software/bash/manual/bash.html#:~:text=%5D-,3.2.5.2%20Conditional%20Constructs,-if Shell 中test 单中括号[\] 双中括号[[]] test/[ ]判断 Linux test Command Tutorial for Beginners (with Examples) (how...
[root@client]# type if if 是 shell 关键字 [root@client]# type elif elif 是 shell 关键字 [...
拖入浏览器,方可跳转到指定锚点https://www.gnu.org/software/bash/manual/bash.html#:~:text=%5D-,3.2.5.2%20Conditional%20Constructs,-if Shell 中test单中括号[\] 双中括号[[]] test/[ ]判断 Linux test Command Tutorial for Beginners (with Examples) (howtoforge.com) ...
温故知新,Linux命令知多少,学习Bash Shell 缩写大全 pwd:print work directory打印当前目录 显示出当前工作目录的绝对路径 ps:process status(进程状态,类似于windows的任务管理器) 常用参数:-auxf ps -auxf 显示进程状态 df:disk free其功能是显示磁盘可用空间数目信息及空间结点信息。换句话说,就是报告在任何安装...
Check if the directory still exists The -d operator allows you to test if a file is a directory. For example, to check if the /etc/filetocheck directory exists, you can use: NOTE: You can also use double brackets [[ instead of [ single brackets. ...
dirExists("./myDir")Check if directory exists mkdir("./newDirName")Create a directory (recursive by default) rmdir("./newDirName")Delete a directory (recursive by default) exists("./aFile.txt")Check if a file exists rm("./myFile")Delete a file ...