Using Grep on txt file to find 7 letter words that start with the same letter
grep -i "^(.).*1$" sowpods.txt > output.txt
I'm using a scrabble words list I downloaded named "sowpods.txt" and I am trying to use grep to find all of the 7 letter words in the file that start and end with the same letter .The line I have now is giving me a backreference error so I tried using online guides but they were insanely confusing. Could someone help me do this? Thanks!
I'm also on a mac and am using the default terminal.
command-line bash grep
edited Feb 12 at 21:49
Kamil Maciorowski
28.6k156187
asked Sep 10 '18 at 13:53
Kappa123Kappa123
62
add a comment |
grep -i "^(.).*1$" sowpods.txt > output.txt
I'm using a scrabble words list I downloaded named "sowpods.txt" and I am trying to use grep to find all of the 7 letter words in the file that start and end with the same letter .The line I have now is giving me a backreference error so I tried using online guides but they were insanely confusing. Could someone help me do this? Thanks!
I'm also on a mac and am using the default terminal.
command-line bash grep
edited Feb 12 at 21:49
Kamil Maciorowski
28.6k156187
asked Sep 10 '18 at 13:53
Kappa123Kappa123
62
2
Please don't make more work for other people by vandalizing your posts. By posting on the Stack Exchange (SE) network, you've granted a non-revocable right, under the CC BY-SA 3.0 license for SE to distribute that content. By SE policy, any vandalism will be reverted. If you want to know more about deleting a post, please take a look at: How does deleting work?
– iBot
Feb 12 at 21:22
add a comment |
grep -i "^(.).*1$" sowpods.txt > output.txt
I'm using a scrabble words list I downloaded named "sowpods.txt" and I am trying to use grep to find all of the 7 letter words in the file that start and end with the same letter .The line I have now is giving me a backreference error so I tried using online guides but they were insanely confusing. Could someone help me do this? Thanks!
I'm also on a mac and am using the default terminal.
command-line bash grep
edited Feb 12 at 21:49
Kamil Maciorowski
28.6k156187
asked Sep 10 '18 at 13:53
Kappa123Kappa123
62
grep -i "^(.).*1$" sowpods.txt > output.txt
I'm using a scrabble words list I downloaded named "sowpods.txt" and I am trying to use grep to find all of the 7 letter words in the file that start and end with the same letter .The line I have now is giving me a backreference error so I tried using online guides but they were insanely confusing. Could someone help me do this? Thanks!
I'm also on a mac and am using the default terminal.
command-line bash grep
command-line bash grep
edited Feb 12 at 21:49
Kamil Maciorowski
28.6k156187
asked Sep 10 '18 at 13:53
Kappa123Kappa123
62
edited Feb 12 at 21:49
Kamil Maciorowski
28.6k156187
asked Sep 10 '18 at 13:53
Kappa123Kappa123
62
edited Feb 12 at 21:49
Kamil Maciorowski
28.6k156187
edited Feb 12 at 21:49
Kamil Maciorowski
28.6k156187
edited Feb 12 at 21:49
Kamil Maciorowski
28.6k156187
28.6k156187
asked Sep 10 '18 at 13:53
Kappa123Kappa123
62
asked Sep 10 '18 at 13:53
Kappa123Kappa123
62
asked Sep 10 '18 at 13:53
Kappa123Kappa123
62
62
2
Please don't make more work for other people by vandalizing your posts. By posting on the Stack Exchange (SE) network, you've granted a non-revocable right, under the CC BY-SA 3.0 license for SE to distribute that content. By SE policy, any vandalism will be reverted. If you want to know more about deleting a post, please take a look at: How does deleting work?
– iBot
Feb 12 at 21:22
add a comment |
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Please don't make more work for other people by vandalizing your posts. By posting on the Stack Exchange (SE) network, you've granted a non-revocable right, under the CC BY-SA 3.0 license for SE to distribute that content. By SE policy, any vandalism will be reverted. If you want to know more about deleting a post, please take a look at: How does deleting work?
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Feb 12 at 21:22
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Please don't make more work for other people by vandalizing your posts. By posting on the Stack Exchange (SE) network, you've granted a non-revocable right, under the CC BY-SA 3.0 license for SE to distribute that content. By SE policy, any vandalism will be reverted. If you want to know more about deleting a post, please take a look at: How does deleting work?
– iBot
Feb 12 at 21:22
Please don't make more work for other people by vandalizing your posts. By posting on the Stack Exchange (SE) network, you've granted a non-revocable right, under the CC BY-SA 3.0 license for SE to distribute that content. By SE policy, any vandalism will be reverted. If you want to know more about deleting a post, please take a look at: How does deleting work?
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Feb 12 at 21:22
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2 Answers
2
active
oldest
votes
This will work as an extended regular expression. You need grep -E:
grep -E -i "^(.).*1$"
To match 7-letter words you need to replace * with {5}:
grep -E -i "^(.).{5}1$"
answered Sep 10 '18 at 14:01
Kamil MaciorowskiKamil Maciorowski
28.6k156187
I'm a fan of the-xflag:grep -Eix "(.).{5}1"
– Jim L.
Jan 30 at 22:46
add a comment |
If you want to use basic regular expression (without option -E), you need a backslash before the opening and closing brackets:
grep -i '^(.).{5}1$' file
Note that it's good idea to use single quote in your grep regex in order to avoid shell parameter expansion.
answered Sep 10 '18 at 14:11
olivoliv
31115
add a comment |
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2 Answers
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active
oldest
votes
2 Answers
2
active
oldest
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active
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active
oldest
votes
This will work as an extended regular expression. You need grep -E:
grep -E -i "^(.).*1$"
To match 7-letter words you need to replace * with {5}:
grep -E -i "^(.).{5}1$"
answered Sep 10 '18 at 14:01
Kamil MaciorowskiKamil Maciorowski
28.6k156187
I'm a fan of the-xflag:grep -Eix "(.).{5}1"
– Jim L.
Jan 30 at 22:46
add a comment |
This will work as an extended regular expression. You need grep -E:
grep -E -i "^(.).*1$"
To match 7-letter words you need to replace * with {5}:
grep -E -i "^(.).{5}1$"
answered Sep 10 '18 at 14:01
Kamil MaciorowskiKamil Maciorowski
28.6k156187
I'm a fan of the-xflag:grep -Eix "(.).{5}1"
– Jim L.
Jan 30 at 22:46
add a comment |
This will work as an extended regular expression. You need grep -E:
grep -E -i "^(.).*1$"
To match 7-letter words you need to replace * with {5}:
grep -E -i "^(.).{5}1$"
answered Sep 10 '18 at 14:01
Kamil MaciorowskiKamil Maciorowski
28.6k156187
This will work as an extended regular expression. You need grep -E:
grep -E -i "^(.).*1$"
To match 7-letter words you need to replace * with {5}:
grep -E -i "^(.).{5}1$"
answered Sep 10 '18 at 14:01
Kamil MaciorowskiKamil Maciorowski
28.6k156187
answered Sep 10 '18 at 14:01
Kamil MaciorowskiKamil Maciorowski
28.6k156187
answered Sep 10 '18 at 14:01
Kamil MaciorowskiKamil Maciorowski
28.6k156187
answered Sep 10 '18 at 14:01
Kamil MaciorowskiKamil Maciorowski
28.6k156187
28.6k156187
I'm a fan of the-xflag:grep -Eix "(.).{5}1"
– Jim L.
Jan 30 at 22:46
add a comment |
I'm a fan of the-xflag:grep -Eix "(.).{5}1"
– Jim L.
Jan 30 at 22:46
I'm a fan of the
-x flag: grep -Eix "(.).{5}1"– Jim L.
Jan 30 at 22:46
I'm a fan of the
-x flag: grep -Eix "(.).{5}1"– Jim L.
Jan 30 at 22:46
add a comment |
If you want to use basic regular expression (without option -E), you need a backslash before the opening and closing brackets:
grep -i '^(.).{5}1$' file
Note that it's good idea to use single quote in your grep regex in order to avoid shell parameter expansion.
answered Sep 10 '18 at 14:11
olivoliv
31115
add a comment |
If you want to use basic regular expression (without option -E), you need a backslash before the opening and closing brackets:
grep -i '^(.).{5}1$' file
Note that it's good idea to use single quote in your grep regex in order to avoid shell parameter expansion.
answered Sep 10 '18 at 14:11
olivoliv
31115
add a comment |
If you want to use basic regular expression (without option -E), you need a backslash before the opening and closing brackets:
grep -i '^(.).{5}1$' file
Note that it's good idea to use single quote in your grep regex in order to avoid shell parameter expansion.
answered Sep 10 '18 at 14:11
olivoliv
31115
If you want to use basic regular expression (without option -E), you need a backslash before the opening and closing brackets:
grep -i '^(.).{5}1$' file
Note that it's good idea to use single quote in your grep regex in order to avoid shell parameter expansion.
answered Sep 10 '18 at 14:11
olivoliv
31115
answered Sep 10 '18 at 14:11
olivoliv
31115
answered Sep 10 '18 at 14:11
olivoliv
31115
answered Sep 10 '18 at 14:11
olivoliv
31115
31115
add a comment |
add a comment |
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Please don't make more work for other people by vandalizing your posts. By posting on the Stack Exchange (SE) network, you've granted a non-revocable right, under the CC BY-SA 3.0 license for SE to distribute that content. By SE policy, any vandalism will be reverted. If you want to know more about deleting a post, please take a look at: How does deleting work?
– iBot
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