$true&&echo"Program 1 was executed."Program 1 was executed.$false&&echo"Program 2 was executed." 在由AND操作符连接在一起的一系列程序中,如果左侧程序退出状态是非零,右侧则不执行。 OR运算符(||)遵循一组类似的原理。只有当左边的命令失败,退出状态不是0时,||右边的命令才会被执行。让我们来看看它是...
python逻辑运算符1.成员 and or not 优先级:() > not > and > or 2.and逻辑运算符and,a andb,如果a和b都为True,则返回True,如果其中一个为 False,返回False,简言之:一假则假,全真则真 3.or逻辑运算符or,a or b, 如果a和b有一个为True,则返回True,如果全为False,返回False,简言之:一真则真,...
$true&&echo"Program 1 was executed."Program1was executed.$false&&echo"Program 2 was executed." 在由AND操作符连接在一起的一系列程序中,如果左侧程序退出状态是非零,右侧则不执行。 OR运算符(||)遵循一组类似的原理。只有当左边的命令失败,退出状态不是0时,||右边的命令才会被执行。让我们来看看它是如...
Example 5: If statement in bash with logical OR operator Example 6: Elif condition in bash Example 7: If Else Statement in Bash Scripting General Syntax of Bash IF ELIF ELSE Below is the general syntax of IF ELIF and ELSE in bash: if CONDITION-TO-TEST; then CODE-TO-EXECUTE-1 elif NEX...
Let's look at common Bash commands and how to use them. lscommand lslists the contents of your current directory or the directory specified in an argument to the command. By itself, it lists the files and directories in the current directory: ...
A single bar character term acts as an OR operator. For example, the following query matches entries that start with core or end with go, rb, or py. "^core|go$|rb$|py$" Help Short PacUI Help For short help, e.g. when using PacUI without UI, use one of the following commands...
it will run the system shell, which may be a completely different shell like dash, or at best bash in compatibility mode. You should use: #!/bin/bash to use bash with all its features. Similarly, if run with sh file you override the shebang and force the script to run with the ...
Themkdir commandcreates a new, empty directory.mkdiralso allows users to set permissions, create multiple directories at once, and much more. The tool is handy when setting up a new project structure or when you need to create nested directories to maintain a well-organized file system. ...
or|| :? $CONTAINER_NAME"test You could use a kind of try catch, to get the exit code and use a simple switch case to run another commands depending on the error exit code: (exit2#here your command which might fail) exit_code=$?
A single bar character term acts as an OR operator. For example, the following query matches entries that start withcoreor end withgo,rb, orpy. Help For short help, e.g. when using PacUI without UI, use one of the following commands: ...