Question

我需要一种在＆＃34;内执行相同命令的方法。循环，例如命令1。实际上我需要这个，因为命令1非常长并且对于不同的变量应该执行类似的操作。

if [ $variable = 'all' ]; then  
  for host in "${servers[@]}"; do   
command 1
  done
elif [ $variable != 'all' ]; then
--->go to command 1
fi

Answer 1

这就是函数的用途：代码重用

do_command1() {
    local host=$1
    command1 "$host" arg ...
}

if [ $variable = 'all' ]; then  
    for host in "${servers[@]}"; do   
        do_command1 "$host"
    done
else 
    do_command1 def_host
fi

Answer 2

创建一个公共数组进行迭代，根据$variable设置其值：

if [[ $variable = 'all' ]]; then
    my_arr=( "${servers[@]}" )
else
    # You may need to provide a suitable value for the lone
    # array element here, other than "dummy_host"
    my_arr=( dummy_host )
fi

for host in "${my_arr[@]}"; do
    command 1
done

在bash脚本中移动命令

2 个答案: