大佬教程收集整理的这篇文章主要介绍了linux – Shell =检查变量是否以#开头，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
#!bin/sh myvar="#comment asfasfasdf" if [ myvar = #* ]
这不起作用.
谢谢！
JANS
if [[ ${x:0:1} == '#' ]] then echo 'yep' else echo 'nope' fi yep
从Bash手册页：
${parameter:offset} ${parameter:offset:length} SubString Expansion. Expands to up to length characters of parameter starTing at the character specified by offset. If length is omitted,expands to the subString of parameter start- ing at the character specified by offset. length and offset are arithmetic expressions (see ARITHMETIC EVALUATION below). length must evaluate to a number greater than or equal to zero. If offset evaluates to a number less than zero,the value is used as an offset from the end of the value of parameter. If parameter is @,the result is length positional parameters beginning at offset. If parameter is an array name indexed by @ or *,the result is the length members of the array beginning with ${parameter[offset]}. A negative offset is taken relative to one greater than the maximum index of the specified array. Note that a negative offset must be separated from the colon by at least one space to avoid being confused with the :- expan- sion. SubString indexing is zero-based unless the positional parameters are used,in which case the indexing starts at 1.
编辑：
当然,如果您转义哈希,您的原始方法会正常工作：
$[[ '#snort' == \#* ]]; echo $? 0
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