Extract range using regular expression

Question

For example

1cn1
1cn2
1cn3
1cn4
1cn5
1cn6
1cn7
1cn8
1cn9
1cn10
1cn11
1cn12

extract lines between 1cn8 to 1cn12

like this i have hundreds of line, want to extract any range by giving the input.

$ cat test | grep '[$0-9]'
1cn1
1cn2
1cn3
1cn4
1cn5
1cn6
1cn7
1cn8
1cn9
1cn10
1cn11
1cn12

these are node names, want to extract node names within the node range. lines starting from1cn8 till 1cn12

What have you tried? Where did you get stuck at? What is the expected output — nu11p01n73R, Dec 19 '16 at 05:49
cat test 1cn1 1cn2 1cn3 1cn4 1cn5 1cn6 1cn7 1cn8 1cn9 1cn10 1cn11 1cn12 — user3742796, Dec 19 '16 at 05:58
Please update the question and add what you have tried. The question is unclear as *between `1cn8` to `1cn12`* do you mean lines starting from `1cn8` till `1cn12` or any line which is between `8-12` in the stirng? — nu11p01n73R, Dec 19 '16 at 06:00
cat test | grep '[$0-9]' 1cn1 1cn2 1cn3 1cn4 1cn5 1cn6 1cn7 1cn8 1cn9 1cn10 1cn11 1cn12 — user3742796, Dec 19 '16 at 06:02
This will be helpful http://stackoverflow.com/a/17988834/3150943 — nu11p01n73R, Dec 19 '16 at 06:17

score 0 · Accepted Answer · answered Dec 19 '16 at 06:49

You can try something like that:

[[:alnum:]]{3}([8-9]|1[0-2])

Short explanation:

[[:alnum:]]{3}: matchs with any letter (upper or lower case) and digits, over 3 times;
([8-9]|1[0-2]): matchs with 8 and 9 [8-9] OR |, the number one with 0, 1 or 2, 1[0-2]

$ cat test
1cn1
1cn2
1cn3
1cn4
1cn5
1cn6
1cn7
1cn8
1cn9
1cn10
1cn11
1cn12
$ egrep '[[:alnum:]]{3}([8-9]|1[0-2])' test
1cn8
1cn9
1cn10
1cn11
1cn12

1 Answers1