replace a string with sed from specific lines
I do know how to replace a string from a specific line such as:
sed -i "<line number>s/<old string>/<new string>/g" <file name>
however I do not know how to replace a string from multiple lines for example from a line number 1 then 10 and then 100
sed
edited Dec 8 '18 at 20:39
Jeff Schaller
39.7k1054126
asked Dec 8 '18 at 20:37
Dimitris MintisDimitris Mintis
805
add a comment |
I do know how to replace a string from a specific line such as:
sed -i "<line number>s/<old string>/<new string>/g" <file name>
however I do not know how to replace a string from multiple lines for example from a line number 1 then 10 and then 100
sed
edited Dec 8 '18 at 20:39
Jeff Schaller
39.7k1054126
asked Dec 8 '18 at 20:37
Dimitris MintisDimitris Mintis
805
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 '18 at 21:33
add a comment |
I do know how to replace a string from a specific line such as:
sed -i "<line number>s/<old string>/<new string>/g" <file name>
however I do not know how to replace a string from multiple lines for example from a line number 1 then 10 and then 100
sed
edited Dec 8 '18 at 20:39
Jeff Schaller
39.7k1054126
asked Dec 8 '18 at 20:37
Dimitris MintisDimitris Mintis
805
I do know how to replace a string from a specific line such as:
sed -i "<line number>s/<old string>/<new string>/g" <file name>
however I do not know how to replace a string from multiple lines for example from a line number 1 then 10 and then 100
sed
sed
edited Dec 8 '18 at 20:39
Jeff Schaller
39.7k1054126
asked Dec 8 '18 at 20:37
Dimitris MintisDimitris Mintis
805
edited Dec 8 '18 at 20:39
Jeff Schaller
39.7k1054126
asked Dec 8 '18 at 20:37
Dimitris MintisDimitris Mintis
805
edited Dec 8 '18 at 20:39
Jeff Schaller
39.7k1054126
edited Dec 8 '18 at 20:39
Jeff Schaller
39.7k1054126
edited Dec 8 '18 at 20:39
Jeff Schaller
39.7k1054126
39.7k1054126
asked Dec 8 '18 at 20:37
Dimitris MintisDimitris Mintis
805
asked Dec 8 '18 at 20:37
Dimitris MintisDimitris Mintis
805
asked Dec 8 '18 at 20:37
Dimitris MintisDimitris Mintis
805
805
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 '18 at 21:33
add a comment |
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 '18 at 21:33
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 '18 at 21:33
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 '18 at 21:33
add a comment |
4 Answers
4
active
oldest
votes
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 '18 at 22:06
SparhawkSparhawk
9,45763992
add a comment |
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 '18 at 23:16
steeldriversteeldriver
35.6k35286
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 '18 at 17:36
add a comment |
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 '18 at 1:05
Jeff Schaller
39.7k1054126
answered Dec 9 '18 at 0:30
IsaacIsaac
11.6k11652
add a comment |
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 '18 at 22:00
Don WDon W
1
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 '18 at 22:03
add a comment |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f486840%2freplace-a-string-with-sed-from-specific-lines%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
4 Answers
4
active
oldest
votes
4 Answers
4
active
oldest
votes
active
oldest
votes
active
oldest
votes
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 '18 at 22:06
SparhawkSparhawk
9,45763992
add a comment |
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 '18 at 22:06
SparhawkSparhawk
9,45763992
add a comment |
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 '18 at 22:06
SparhawkSparhawk
9,45763992
Here is an awk answer.
awk 'NR == 1 || NR == 10 || NR == 100 {gsub(/old/,"new")}; {print}' <file name>
Explanation
NR == 1 || NR == 10 || NR == 100: only do the following commands on one of these lines.
gsub(/old/,"new"): substitute/old/withnew.
{print}: regardless of what line you are on, print the line.
answered Dec 8 '18 at 22:06
SparhawkSparhawk
9,45763992
answered Dec 8 '18 at 22:06
SparhawkSparhawk
9,45763992
answered Dec 8 '18 at 22:06
SparhawkSparhawk
9,45763992
answered Dec 8 '18 at 22:06
SparhawkSparhawk
9,45763992
9,45763992
add a comment |
add a comment |
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 '18 at 23:16
steeldriversteeldriver
35.6k35286
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 '18 at 17:36
add a comment |
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 '18 at 23:16
steeldriversteeldriver
35.6k35286
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 '18 at 17:36
add a comment |
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 '18 at 23:16
steeldriversteeldriver
35.6k35286
As far as I know, sed addresses may only consist of a single line, or a range of lines.
However you could cobble something together using sed -f - to read commands from standard input, together with your shell. For example:
printf '%ds/<old string>/<new string>/gn' {1,10,100} | sed -f - file
answered Dec 8 '18 at 23:16
steeldriversteeldriver
35.6k35286
answered Dec 8 '18 at 23:16
steeldriversteeldriver
35.6k35286
answered Dec 8 '18 at 23:16
steeldriversteeldriver
35.6k35286
answered Dec 8 '18 at 23:16
steeldriversteeldriver
35.6k35286
35.6k35286
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 '18 at 17:36
add a comment |
Brilliant solution. Alternative to avoid the pipe:sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1
– George Vasiliou
Dec 9 '18 at 17:36
Brilliant solution. Alternative to avoid the pipe:
sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1– George Vasiliou
Dec 9 '18 at 17:36
Brilliant solution. Alternative to avoid the pipe:
sed -f <(printf '%ds/line/LINE/gn' {1,10,100}) file1– George Vasiliou
Dec 9 '18 at 17:36
add a comment |
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 '18 at 1:05
Jeff Schaller
39.7k1054126
answered Dec 9 '18 at 0:30
IsaacIsaac
11.6k11652
add a comment |
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 '18 at 1:05
Jeff Schaller
39.7k1054126
answered Dec 9 '18 at 0:30
IsaacIsaac
11.6k11652
add a comment |
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 '18 at 1:05
Jeff Schaller
39.7k1054126
answered Dec 9 '18 at 0:30
IsaacIsaac
11.6k11652
An alternative directly with sed:
sed '1b1; 10b1; 100b1; b ;:1;s/<old string>/<new string>/g' <file name>
If the line number matches either 1, 10, or 100, branch to label 1; on other lines, just branch to the end (which, by default, prints the line).
somewhat automated:
sed -e $(printf '%sb1;' 1 10 100) -e 'b; :1;s/<old>/<new>/g' <file name>
POSIXly (with default IFS):
sed $(printf -- '-e %sb1 ' 1 10 100) -e 'b' -e':1' -e 's/<old>/<new>/g'
edited Dec 9 '18 at 1:05
Jeff Schaller
39.7k1054126
answered Dec 9 '18 at 0:30
IsaacIsaac
11.6k11652
edited Dec 9 '18 at 1:05
Jeff Schaller
39.7k1054126
edited Dec 9 '18 at 1:05
Jeff Schaller
39.7k1054126
edited Dec 9 '18 at 1:05
Jeff Schaller
39.7k1054126
39.7k1054126
answered Dec 9 '18 at 0:30
IsaacIsaac
11.6k11652
answered Dec 9 '18 at 0:30
IsaacIsaac
11.6k11652
answered Dec 9 '18 at 0:30
IsaacIsaac
11.6k11652
11.6k11652
add a comment |
add a comment |
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 '18 at 22:00
Don WDon W
1
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 '18 at 22:03
add a comment |
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 '18 at 22:00
Don WDon W
1
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 '18 at 22:03
add a comment |
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 '18 at 22:00
Don WDon W
1
Well, how about:
sed -e '
/something_identifying_startline/,/something_identifying_endline/{
s/dog/cat/
s/black/white/
}
answered Dec 8 '18 at 22:00
Don WDon W
1
answered Dec 8 '18 at 22:00
Don WDon W
1
answered Dec 8 '18 at 22:00
Don WDon W
1
answered Dec 8 '18 at 22:00
Don WDon W
1
1
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 '18 at 22:03
add a comment |
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 '18 at 22:03
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 '18 at 22:03
Welsome to U/L and thanks for posting an answer. However, this won't let you select multiple ranges (nor select by line number).
– Sparhawk
Dec 8 '18 at 22:03
add a comment |
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f486840%2freplace-a-string-with-sed-from-specific-lines%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
sed doesn't support substitution by set of arbitrary numbers
– RomanPerekhrest
Dec 8 '18 at 21:33