Mfcttrf

sed delete all the words before a match

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sed delete all the words before a match

How to count the number of words and print the lines that match exactly a given pattern?sed lines after match and before next matchUsing sed to replace wordsHow to delete all occurrences of a list of words from a text file?Delete lines containing the pattern and the line beforeHow to match a pattern in lines before another pattern matchRemove all words before a specific pattern, after another patternDelete n lines after pattern and m lines before patternhow to add words before line on all the scripts in current foldersed: delete all lines before matching one, including this one

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;

4

I want to delete all the words before a pattern for example: I want to delete all the words before STAC.

Input:

asd
asdd
asddd
STAC
asd
as

Output:

STAC
asd
as

I have this code sed -ni "s/^.*STAC//d" myfile

text-processing sed

share|improve this question

edited 9 hours ago

Nicolás Gómez

asked 9 hours ago

Nicolás GómezNicolás Gómez

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Nicolás Gómez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If a line has that word it doesn't matter, you just have to eliminate everything that is before that precise word, that is, STAC no HAYSTACK or any combination. Just STAC
  
  – Nicolás Gómez
  9 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks for the comment. I just modified the input
  
  – Nicolás Gómez
  9 hours ago
  

  
  
  
  

add a comment | 

4

I want to delete all the words before a pattern for example: I want to delete all the words before STAC.

Input:

asd
asdd
asddd
STAC
asd
as

Output:

STAC
asd
as

I have this code sed -ni "s/^.*STAC//d" myfile

text-processing sed

share|improve this question

edited 9 hours ago

Nicolás Gómez

asked 9 hours ago

Nicolás GómezNicolás Gómez

2122 bronze badges

New contributor

Nicolás Gómez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  If a line has that word it doesn't matter, you just have to eliminate everything that is before that precise word, that is, STAC no HAYSTACK or any combination. Just STAC
  
  – Nicolás Gómez
  9 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  thanks for the comment. I just modified the input
  
  – Nicolás Gómez
  9 hours ago
  

  
  
  
  

add a comment | 

I want to delete all the words before a pattern for example: I want to delete all the words before STAC.

Input:

asd
asdd
asddd
STAC
asd
as

Output:

STAC
asd
as

I have this code sed -ni "s/^.*STAC//d" myfile

text-processing sed

share|improve this question

edited 9 hours ago

Nicolás Gómez

asked 9 hours ago

Nicolás GómezNicolás Gómez

2122 bronze badges

New contributor

Nicolás Gómez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asd
asdd
asddd
STAC
asd
as

STAC
asd
as

share|improve this question

edited 9 hours ago

Nicolás Gómez

asked 9 hours ago

Nicolás GómezNicolás Gómez

2122 bronze badges

New contributor

Nicolás Gómez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

edited 9 hours ago

Nicolás Gómez

asked 9 hours ago

Nicolás GómezNicolás Gómez

2122 bronze badges

New contributor

Nicolás Gómez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 9 hours ago

Nicolás GómezNicolás Gómez

2122 bronze badges

New contributor

Nicolás Gómez is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 9 hours ago

Nicolás GómezNicolás Gómez

2122 bronze badges

5 Answers
5

active

oldest

votes

8

sed works linewise, that's why your try will not work.

So how to do it with sed? Define an address range, starting from the STAC line (/^STAC$/) to the end of the file ($). Those should be printed, so everything else (!) should get deleted:

sed -i '/^STAC$/,$!d' myfile

share|improve this answer

answered 8 hours ago

PhilipposPhilippos

7,05911 gold badge2020 silver badges5151 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Also possible: sed -ni '/^STAC$/,$p' myfile
  
  – filbranden
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  This is for GNU sed only.
  
  – Christopher
  7 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Christopher Indeed, the -i option requires an argument (extension) for BSD sed and is not part of the standard. While the OP obviously uses GNU sed, your remark is valuable for future readers, so thank you!
  
  – Philippos
  6 hours ago
  

  
  
  
  

add a comment | 

5

An awk variant which prints all lines after the match (including the match):

$ awk '/^STAC$/ out=1 out' file
STAC
asd
as

This matches the line that only contains the string STAC and sets out to a non-zero value. For each line, if out is non-zero, print it.

Use $0 == "STAC" instead of /^STAC$/ to do a string comparison instead of a regular expression match.

---

Slightly more obfuscated but shorter, using the boolean result of the match with the regular expression as an integer (will be 0 for a non-match, and 1 for a match):

awk 'p += /^STAC$/' file

If the result in p is non-zero, which it will be from the point where the regular expression first matches, the current line will be printed.

Use p += ($0 == "STAC") instead of p += /^STAC$/ to do a string comparison instead of a regular expression match.

share|improve this answer

edited 3 hours ago

answered 7 hours ago

Kusalananda♦Kusalananda

158k1818 gold badges313313 silver badges499499 bronze badges

add a comment | 

2

Another option would be to use a scriptable editor like ed:

printf '%sn' '1,/^STAC/-1 d' 'wq' | ed -s myfile

This prints two commands to ed:

• delete lines from 1 through (the line before the one that starts with STAC)


• write the file back to disk and quit

The -s option inhibits ed's default printing of the number of bytes read & written.

share|improve this answer

answered 7 hours ago

Jeff Schaller♦Jeff Schaller

48.7k1111 gold badges7272 silver badges162162 bronze badges

add a comment | 

1

Using awk:

awk '/^STAC$/,/$ /' input

This will print all lines between STAC and anything (including the matching lines)

---

Or using a grep that supports the -z option (BSD grep does not):

Treat input and output data as sequences of lines, each terminated by a zero byte (the ASCII NUL character) instead of a newline.

grep -z 'STAC' input

share|improve this answer

edited 7 hours ago

answered 9 hours ago

Jesse_bJesse_b

18.5k33 gold badges4646 silver badges8686 bronze badges

add a comment | 

0

grep -wn STAC file.txt | cut -d":" -f 1 | xargs -I % sed '1,%d' file.txt

Get line number of the word, pass it to xargs and use sed to delete.

share|improve this answer

answered 4 hours ago

Death MetalDeath Metal

7933 silver badges1212 bronze badges

add a comment | 

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8

sed works linewise, that's why your try will not work.

So how to do it with sed? Define an address range, starting from the STAC line (/^STAC$/) to the end of the file ($). Those should be printed, so everything else (!) should get deleted:

sed -i '/^STAC$/,$!d' myfile

share|improve this answer

answered 8 hours ago

PhilipposPhilippos

7,05911 gold badge2020 silver badges5151 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Also possible: sed -ni '/^STAC$/,$p' myfile
  
  – filbranden
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  This is for GNU sed only.
  
  – Christopher
  7 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Christopher Indeed, the -i option requires an argument (extension) for BSD sed and is not part of the standard. While the OP obviously uses GNU sed, your remark is valuable for future readers, so thank you!
  
  – Philippos
  6 hours ago
  

  
  
  
  

add a comment | 

8

sed works linewise, that's why your try will not work.

So how to do it with sed? Define an address range, starting from the STAC line (/^STAC$/) to the end of the file ($). Those should be printed, so everything else (!) should get deleted:

sed -i '/^STAC$/,$!d' myfile

share|improve this answer

answered 8 hours ago

PhilipposPhilippos

7,05911 gold badge2020 silver badges5151 bronze badges

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Also possible: sed -ni '/^STAC$/,$p' myfile
  
  – filbranden
  7 hours ago
  

  
  
  
  


• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  This is for GNU sed only.
  
  – Christopher
  7 hours ago
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Christopher Indeed, the -i option requires an argument (extension) for BSD sed and is not part of the standard. While the OP obviously uses GNU sed, your remark is valuable for future readers, so thank you!
  
  – Philippos
  6 hours ago
  

  
  
  
  

add a comment | 

sed works linewise, that's why your try will not work.

So how to do it with sed? Define an address range, starting from the STAC line (/^STAC$/) to the end of the file ($). Those should be printed, so everything else (!) should get deleted:

sed -i '/^STAC$/,$!d' myfile

share|improve this answer

answered 8 hours ago

PhilipposPhilippos

7,05911 gold badge2020 silver badges5151 bronze badges

sed -i '/^STAC$/,$!d' myfile

share|improve this answer

answered 8 hours ago

PhilipposPhilippos

7,05911 gold badge2020 silver badges5151 bronze badges

answered 8 hours ago

PhilipposPhilippos

7,05911 gold badge2020 silver badges5151 bronze badges

answered 8 hours ago

PhilipposPhilippos

7,05911 gold badge2020 silver badges5151 bronze badges

5

An awk variant which prints all lines after the match (including the match):

$ awk '/^STAC$/ out=1 out' file
STAC
asd
as

This matches the line that only contains the string STAC and sets out to a non-zero value. For each line, if out is non-zero, print it.

Use $0 == "STAC" instead of /^STAC$/ to do a string comparison instead of a regular expression match.

---

Slightly more obfuscated but shorter, using the boolean result of the match with the regular expression as an integer (will be 0 for a non-match, and 1 for a match):

awk 'p += /^STAC$/' file

If the result in p is non-zero, which it will be from the point where the regular expression first matches, the current line will be printed.

Use p += ($0 == "STAC") instead of p += /^STAC$/ to do a string comparison instead of a regular expression match.

share|improve this answer

edited 3 hours ago

answered 7 hours ago

Kusalananda♦Kusalananda

158k1818 gold badges313313 silver badges499499 bronze badges

add a comment | 

5

An awk variant which prints all lines after the match (including the match):

$ awk '/^STAC$/ out=1 out' file
STAC
asd
as

This matches the line that only contains the string STAC and sets out to a non-zero value. For each line, if out is non-zero, print it.

Use $0 == "STAC" instead of /^STAC$/ to do a string comparison instead of a regular expression match.

---

Slightly more obfuscated but shorter, using the boolean result of the match with the regular expression as an integer (will be 0 for a non-match, and 1 for a match):

awk 'p += /^STAC$/' file

If the result in p is non-zero, which it will be from the point where the regular expression first matches, the current line will be printed.

Use p += ($0 == "STAC") instead of p += /^STAC$/ to do a string comparison instead of a regular expression match.

share|improve this answer

edited 3 hours ago

answered 7 hours ago

Kusalananda♦Kusalananda

158k1818 gold badges313313 silver badges499499 bronze badges

add a comment | 

An awk variant which prints all lines after the match (including the match):

$ awk '/^STAC$/ out=1 out' file
STAC
asd
as

This matches the line that only contains the string STAC and sets out to a non-zero value. For each line, if out is non-zero, print it.

Use $0 == "STAC" instead of /^STAC$/ to do a string comparison instead of a regular expression match.

---

Slightly more obfuscated but shorter, using the boolean result of the match with the regular expression as an integer (will be 0 for a non-match, and 1 for a match):

awk 'p += /^STAC$/' file

If the result in p is non-zero, which it will be from the point where the regular expression first matches, the current line will be printed.

Use p += ($0 == "STAC") instead of p += /^STAC$/ to do a string comparison instead of a regular expression match.

share|improve this answer

edited 3 hours ago

answered 7 hours ago

Kusalananda♦Kusalananda

158k1818 gold badges313313 silver badges499499 bronze badges

$ awk '/^STAC$/ out=1 out' file
STAC
asd
as

awk 'p += /^STAC$/' file

share|improve this answer

edited 3 hours ago

answered 7 hours ago

Kusalananda♦Kusalananda

158k1818 gold badges313313 silver badges499499 bronze badges

answered 7 hours ago

Kusalananda♦Kusalananda

158k1818 gold badges313313 silver badges499499 bronze badges

answered 7 hours ago

Kusalananda♦Kusalananda

158k1818 gold badges313313 silver badges499499 bronze badges

2

Another option would be to use a scriptable editor like ed:

printf '%sn' '1,/^STAC/-1 d' 'wq' | ed -s myfile

This prints two commands to ed:

• delete lines from 1 through (the line before the one that starts with STAC)


• write the file back to disk and quit

The -s option inhibits ed's default printing of the number of bytes read & written.

share|improve this answer

answered 7 hours ago

Jeff Schaller♦Jeff Schaller

48.7k1111 gold badges7272 silver badges162162 bronze badges

add a comment | 

2

Another option would be to use a scriptable editor like ed:

printf '%sn' '1,/^STAC/-1 d' 'wq' | ed -s myfile

This prints two commands to ed:

• delete lines from 1 through (the line before the one that starts with STAC)


• write the file back to disk and quit

The -s option inhibits ed's default printing of the number of bytes read & written.

share|improve this answer

answered 7 hours ago

Jeff Schaller♦Jeff Schaller

48.7k1111 gold badges7272 silver badges162162 bronze badges

add a comment | 

Another option would be to use a scriptable editor like ed:

printf '%sn' '1,/^STAC/-1 d' 'wq' | ed -s myfile

This prints two commands to ed:

• delete lines from 1 through (the line before the one that starts with STAC)


• write the file back to disk and quit

The -s option inhibits ed's default printing of the number of bytes read & written.

share|improve this answer

answered 7 hours ago

Jeff Schaller♦Jeff Schaller

48.7k1111 gold badges7272 silver badges162162 bronze badges

printf '%sn' '1,/^STAC/-1 d' 'wq' | ed -s myfile

share|improve this answer

answered 7 hours ago

Jeff Schaller♦Jeff Schaller

48.7k1111 gold badges7272 silver badges162162 bronze badges

answered 7 hours ago

Jeff Schaller♦Jeff Schaller

48.7k1111 gold badges7272 silver badges162162 bronze badges

answered 7 hours ago

Jeff Schaller♦Jeff Schaller

48.7k1111 gold badges7272 silver badges162162 bronze badges

1

Using awk:

awk '/^STAC$/,/$ /' input

This will print all lines between STAC and anything (including the matching lines)

---

Or using a grep that supports the -z option (BSD grep does not):

Treat input and output data as sequences of lines, each terminated by a zero byte (the ASCII NUL character) instead of a newline.

grep -z 'STAC' input

share|improve this answer

edited 7 hours ago

answered 9 hours ago

Jesse_bJesse_b

18.5k33 gold badges4646 silver badges8686 bronze badges

add a comment | 

1

Using awk:

awk '/^STAC$/,/$ /' input

This will print all lines between STAC and anything (including the matching lines)

---

Or using a grep that supports the -z option (BSD grep does not):

Treat input and output data as sequences of lines, each terminated by a zero byte (the ASCII NUL character) instead of a newline.

grep -z 'STAC' input

share|improve this answer

edited 7 hours ago

answered 9 hours ago

Jesse_bJesse_b

18.5k33 gold badges4646 silver badges8686 bronze badges

add a comment | 

Using awk:

awk '/^STAC$/,/$ /' input

This will print all lines between STAC and anything (including the matching lines)

---

Or using a grep that supports the -z option (BSD grep does not):

Treat input and output data as sequences of lines, each terminated by a zero byte (the ASCII NUL character) instead of a newline.

grep -z 'STAC' input

share|improve this answer

edited 7 hours ago

answered 9 hours ago

Jesse_bJesse_b

18.5k33 gold badges4646 silver badges8686 bronze badges

awk '/^STAC$/,/$ /' input

grep -z 'STAC' input

share|improve this answer

edited 7 hours ago

answered 9 hours ago

Jesse_bJesse_b

18.5k33 gold badges4646 silver badges8686 bronze badges

answered 9 hours ago

Jesse_bJesse_b

18.5k33 gold badges4646 silver badges8686 bronze badges

answered 9 hours ago

Jesse_bJesse_b

18.5k33 gold badges4646 silver badges8686 bronze badges

0

grep -wn STAC file.txt | cut -d":" -f 1 | xargs -I % sed '1,%d' file.txt

Get line number of the word, pass it to xargs and use sed to delete.

share|improve this answer

answered 4 hours ago

Death MetalDeath Metal

7933 silver badges1212 bronze badges

add a comment | 

0

grep -wn STAC file.txt | cut -d":" -f 1 | xargs -I % sed '1,%d' file.txt

Get line number of the word, pass it to xargs and use sed to delete.

share|improve this answer

answered 4 hours ago

Death MetalDeath Metal

7933 silver badges1212 bronze badges

add a comment | 

grep -wn STAC file.txt | cut -d":" -f 1 | xargs -I % sed '1,%d' file.txt

Get line number of the word, pass it to xargs and use sed to delete.

share|improve this answer

answered 4 hours ago

Death MetalDeath Metal

7933 silver badges1212 bronze badges

share|improve this answer

answered 4 hours ago

Death MetalDeath Metal

7933 silver badges1212 bronze badges

answered 4 hours ago

Death MetalDeath Metal

7933 silver badges1212 bronze badges

answered 4 hours ago

Death MetalDeath Metal

7933 silver badges1212 bronze badges