# Check if a command is successful if ls then echo "Command succeeded" else echo "Command failed" fi ``` 通过使用if-else语句,用户可以根据不同的条件执行不同的操作。这使得Bash脚本更加灵活和强大,可以满足各种不同的需求。同时,if-else语句也可以嵌套在其他if-else语句中,以实现更复杂的逻辑控制。 ...
You can use exit codes in if…else statements in Bash to check status of previous command or a script. The exit code, by convention, value 0 means success and any other value (1-255) means failure. The exit code of the previous command is denoted by $?. command if [ $? -eq 0 ]...
您最喜欢用什么方法来处理bash中的错误?我在网上发现的处理错误的最好例子是由WilliamShotts,Jr在http://www.linuxcommand.org上写的。 他建议在bash中使用以下函数进行错误处理:12345678910111213141516171819202122232425262728293031#!/bin/bash...
For the shell’s purposes, a command which exits with a zero exit status has succeeded. An exit status of zero indicates success. A non-zero exit status indicates failure. When a command terminates on a fatal signal N, bash uses the value of 128+N as the exit status. As usual, you ...
每行内容解释: COMMAND: 执行程序所使用的终端命令(默认仅显示前9个字符) PID:文件描述符所属进程的PID USER:用用该进程描述符的用户的用户名 FD:文件描述符的描述。其中cwd表示进程的工作目录,r...-bash:***: command not found 1. -bash: lspci/usb: command not found 2.-bash: ifconfig: command...
: line 1: $'\r': command not found 1. 出现这样的错误,是因为Shell脚本在Windows系统编写时,每行结尾是\r\n,而在Linux系统中行每行结尾是\n,所以在Linux系统中运行脚本时,会认为\r是一个字符,导致运行错误。 解决方法 去除Shell脚本的\r字符: ...
bash's exit status is the exit status of the last command executed in the script. If no commands are executed, the exit status is 0. An attempt is first made to open the file in the current directory, and if no file is found, the shell searches the directories in PATH for the ...
Every command in bash returns an exit status, which is an integer between 0 and 255 that represents whether the command succeeded or failed, and if it failed, what kind of error occurred. Functions also can return an exit status via thereturnkeyword. The exit status can be checked using ba...
:"${scan_status}","target_url":"","description":"${status_description}","context":"Check...
Bash while Loop with sleep Command Bash while Loop Increment and Decrement Conclusion Bash while Loop Syntax The syntax of Bash while loop is as follows: while [condition] do commands_to_execute done The while loop is initiated with thewhile, succeeded by the condition enclosed withinthedoanddon...