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Search and replace a substring only if another substring is not present

Search and replace with sedHow can I replace a string in a file(s)?Find & replace image URLs in one file from another fileHow to replace string of the file, which is present in tar file through UNIXsed append a text with many lines after matching of multiple strings while the text remains many lines in sed commandBash while loop search and replace using sedExtracting values from a text file having | pipe as a delimiter in text file using awk command and Replacing new lines with <br> tag using sed?How to run different python scripts from command line by passing the script name as argumentchange only part of the substring using sedSed to replace lowercase and capital strings

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

0

I have the following strings in a very large document:

1.test.html#

2.test.md#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.md#

Now I want to replace every .md# with .html# but ONLY if there is no http in the string. So only 2 and 6 should have a replacement. How can I do this in a shell script?

shell-script sed

share|improve this question

asked 16 mins ago

JeroenJeroen

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0

I have the following strings in a very large document:

1.test.html#

2.test.md#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.md#

Now I want to replace every .md# with .html# but ONLY if there is no http in the string. So only 2 and 6 should have a replacement. How can I do this in a shell script?

shell-script sed

share|improve this question

asked 16 mins ago

JeroenJeroen

10322 bronze badges

New contributor

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

add a comment | 

I have the following strings in a very large document:

1.test.html#

2.test.md#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.md#

Now I want to replace every .md# with .html# but ONLY if there is no http in the string. So only 2 and 6 should have a replacement. How can I do this in a shell script?

shell-script sed

share|improve this question

asked 16 mins ago

JeroenJeroen

10322 bronze badges

New contributor

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

1.test.html#

2.test.md#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.md#

share|improve this question

asked 16 mins ago

JeroenJeroen

10322 bronze badges

New contributor

Jeroen 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

asked 16 mins ago

JeroenJeroen

10322 bronze badges

New contributor

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

asked 16 mins ago

JeroenJeroen

10322 bronze badges

New contributor

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

asked 16 mins ago

JeroenJeroen

10322 bronze badges

1 Answer
1

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1

With GNU sed. If current line (pattern space) contains http jump to end of script (b). Otherwise do search and replace.

sed '/http/b; s/.md#/.html#/' file

Output:

1.test.html#

2.test.html#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.html#

If you want to edit your file "in place" use sed's option -i.

---

See: man sed

share|improve this answer

answered 12 mins ago

CyrusCyrus

7,80622 gold badges1212 silver badges4141 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works! Can only accept the answer in 6 minutes... Will do so then ;-)
  
  – Jeroen
  7 mins ago
  

  
  
  
  

add a comment | 

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1

With GNU sed. If current line (pattern space) contains http jump to end of script (b). Otherwise do search and replace.

sed '/http/b; s/.md#/.html#/' file

Output:

1.test.html#

2.test.html#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.html#

If you want to edit your file "in place" use sed's option -i.

---

See: man sed

share|improve this answer

answered 12 mins ago

CyrusCyrus

7,80622 gold badges1212 silver badges4141 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works! Can only accept the answer in 6 minutes... Will do so then ;-)
  
  – Jeroen
  7 mins ago
  

  
  
  
  

add a comment | 

1

With GNU sed. If current line (pattern space) contains http jump to end of script (b). Otherwise do search and replace.

sed '/http/b; s/.md#/.html#/' file

Output:

1.test.html#

2.test.html#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.html#

If you want to edit your file "in place" use sed's option -i.

---

See: man sed

share|improve this answer

answered 12 mins ago

CyrusCyrus

7,80622 gold badges1212 silver badges4141 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works! Can only accept the answer in 6 minutes... Will do so then ;-)
  
  – Jeroen
  7 mins ago
  

  
  
  
  

add a comment | 

With GNU sed. If current line (pattern space) contains http jump to end of script (b). Otherwise do search and replace.

sed '/http/b; s/.md#/.html#/' file

Output:

1.test.html#

2.test.html#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.html#

If you want to edit your file "in place" use sed's option -i.

---

See: man sed

share|improve this answer

answered 12 mins ago

CyrusCyrus

7,80622 gold badges1212 silver badges4141 bronze badges

sed '/http/b; s/.md#/.html#/' file

1.test.html#

2.test.html#

3.http://test.html#

4.https://test.md#

5.http://test.md#

6.test2.html#

share|improve this answer

answered 12 mins ago

CyrusCyrus

7,80622 gold badges1212 silver badges4141 bronze badges

answered 12 mins ago

CyrusCyrus

7,80622 gold badges1212 silver badges4141 bronze badges

answered 12 mins ago

CyrusCyrus

7,80622 gold badges1212 silver badges4141 bronze badges