相关疑难解决方法(0)

在Solaris上,似乎我需要单引号"匹配行的开头"表达式:

 > sh
 $ echo offset 0.000000 2>&1 | grep ^offset | tail -1
 offset: not found
 $ Usage:        grep [-c|-l|-q] [-bhinsvwx] pattern_list [file ...]
         grep [-c|-l|-q] [-bhinsvwx] [-e pattern_list]... [-f pattern_file]... [file...]
         grep -E [-c|-l|-q] [-bhinsvx] pattern_list [file ...]
         grep -E [-c|-l|-q] [-bhinsvx] [-e pattern_list]... [-f pattern_file]... [file...]
         grep -F [-c|-l|-q] [-bhinsvx] pattern_list [file ...]
         grep -F [-c|-l|-q] [-bhinsvx] [-e pattern_list]... [-f pattern_file]... [file...]

我可以通过单引用正则表达式来轻松解决这个问题:

 > sh
 $ echo offset 0.000000 2>&1 | grep '^offset'| tail -1
 offset 0.000000 …