不允许在单引号中包含单引号，即使转义单引号也不行：
1 2 | $ echo '\''> |
但是用Bash的字符拼接特性可以实现：
1 2 | $ echo ''"'"''' |
上述实际上，是3个部分拼接
' '
" ' "
' '
中间没有空格，为了显示添加的空格，第一个是空字符串，第二个是单引号，第三个是空字符串。
Explanation of how
'"'"'is interpreted as just':
'End first quotation which uses single quotes.
"Start second quotation, using double-quotes.
'Quoted character.
"End second quotation, using double-quotes.
'Start third quotation, using single quotes.If you do not place any whitespaces between (1) and (2), or between (4) and (5), the shell will interpret that string as a one long word.
实际应用：
1 2 | $ echo 'Jim'"'"'s'Jim's |
但是通常使用双引号是可以的，具体要根据强引用和弱引用的作用范围来确定。
1 2 | $ echo "Jim's"Jim's |
参考
https://stackoverflow.com/questions/1250079/how-to-escape-single-quotes-within-single-quoted-strings