Linux terminal prompts insufficient permissions when executing shell script

Problem description:

Today I tried to set up a working environment for dynamips in Linux. I encountered a small problem when executing the shell script. There is a file called start.sh. Script file, the content is as follows:

#!/bin/bash
./dynamips.bin -H 7200 &

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After executing the shell script in the terminal, the following problem occurs:

[root]# ./start.sh
bash: ./start.sh: 权限不够

Solution:

First use the chmod command to grant permissions to the shell script, and then execute the command:

[root]# chmod 777 ./start.sh
[root]# ./start.sh

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