这个grep有意思

复制内容到剪贴板

代码:

[0 No.2004 huan@deb ~]$ cat k
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
[0 No.2005 huan@deb ~]$ wc -c < k
80

[0 No.2006 huan@deb ~]$ egrep  -o '.{20}' k
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa

[0 No.2007 huan@deb ~]$ egrep  -o '.{40}' k
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[0 No.2008 huan@deb ~]$ egrep  -o '.{30}' k
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

[0 No.2009 huan@deb ~]$