1、command解释
command命令在shell脚本里面，如果发现有个函数和我们需要执行的命令同名，我们可以用command用来强制执行后面的命令，而不是同名函数，然后我们也可以在shell脚本里面判断莫个命令是否存在，我们平时一般用which命令也行。
2、测试代码
#!/bin/bash function pwd() { echo "I am pwd function" } echo "shell run pwd" pwd echo "shell command pwd" command pwd if command -v pwd > /dev/null; then echo "pwd command has found" else echo "pwd command has not found" fi if command -v pwd1 > /dev/null; then echo "pwd1 command has found" else echo "pwd1 command has not found" fi
3、运行结果
./command
shell run pwd
I am pwd function
shell command pwd
/home/chenyu/Desktop/linux/dabian/python
pwd command has found
pwd1 command has not found
