相关疑难解决方法(0)

我正在使用Ubuntu系统shell,而不是bash,我发现常规方式无法正常工作:

#!/bin/sh
string='My string';

if [[ $string =~ .*My.* ]]
then
   echo "It's there!"
fi

错误[[:找不到!

我该怎么做才能解决这个问题？

#!/bin/bash
# This file will fix the cygwin vs linux paths and load programmer's notepad under windows.
# mail : <sandundhammikaperera@gmail.com> 
# invokes the GNU GPL, all rights are granted.


# check first parameter is non empty.
# if empty then give a error message and exit.
file=${1:?"Usage: pn filename"};

if [[ "$file" == /*/* ]] ;then
  #if long directory name.
# :FAILTHROUGH:
  echo "$0: Executing pn.exe $file" 

else 
  file="$(pwd)/$file";
fi

#check whether the filename starts with / if so …