Mfcttrf

Why are Starfleet vessels designed with nacelles so far away from the hull?

If the music alphabet had more than 7 letters would octaves still sound like the same note?

How can demon technology be prevented from surpassing humans?

How to remind myself to lock my doors

An idiomatic word for "very little" in this context?

Is data science mathematically interesting?

How did Ron get five hundred Chocolate Frog cards?

Glacial, Magnetic and Mossy Lures; what Pokémon do they attract?

Does wall of stone need support or not?

How to execute a project with two resources where you need three resources?

Where is a "fat Cantor staircase" differentiable?

How should I tell a professor the answer to something he doesn't know?

Why is it so hard to land on the Moon?

Drawing Super Mario Bros.....in LaTeX

Giving a character trauma but not "diagnosing" her?

How can I attach a set of five panniers?

I didn't do any exit passport control when leaving Japan. What should I do?

Google can't fetch large sitemap with 50k URLs, nor will browsers render it

Why does 1.1.1.1 not resolve archive.is?

Match the blocks

Would removing the "total cover" part of a Paladin's Divine Sense unbalance the feature?

My professor says my digit summing code is flawed. Is he right?

'Kukhtarev's model' or 'THE Kukhtarev's model'?

Did smallpox emerge in 1580?

Using “sed” to append to end of a file

writing a command transcript to fileCreate a file as a different user and groupAppend at the end of line using sedsed - calling a variable from a file with multilineStandard Out Append to File Size LimitationsWhere should I put ownerless log file-w flag in bash if statement not working

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

2

I am currently using sed to write to an apache configuration file from stdin. I am using sed in this script to get around the bash script limition where the calling user does not have privilegess to write to the file, so I can't simply echo "..." >> outputfile.conf

Here is what I have for writing to the file:

echo "<VirtualHost *:80>
 ...
</VirtualHost>" | sudo sed -n "w/etc/apache2/sites-available/000-default.conf"

How can I later append to this same file?

if $enable_ssl; then
 echo "<VirtualHost *:443>
 ...
 </VirtualHost>" | sudo sed <opions-to-sed-here>
fi

bash shell-script sed

share|improve this question

edited 8 hours ago

Maverik Minett

asked 8 hours ago

Maverik MinettMaverik Minett

1122 bronze badges

New contributor

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

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Could you simply use tee -a?
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  

add a comment
 | 

2

I am currently using sed to write to an apache configuration file from stdin. I am using sed in this script to get around the bash script limition where the calling user does not have privilegess to write to the file, so I can't simply echo "..." >> outputfile.conf

Here is what I have for writing to the file:

echo "<VirtualHost *:80>
 ...
</VirtualHost>" | sudo sed -n "w/etc/apache2/sites-available/000-default.conf"

How can I later append to this same file?

if $enable_ssl; then
 echo "<VirtualHost *:443>
 ...
 </VirtualHost>" | sudo sed <opions-to-sed-here>
fi

bash shell-script sed

share|improve this question

edited 8 hours ago

Maverik Minett

asked 8 hours ago

Maverik MinettMaverik Minett

1122 bronze badges

New contributor

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

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  Could you simply use tee -a?
  
  – Arkadiusz Drabczyk
  8 hours ago
  

  
  
  
  

add a comment
 | 

I am currently using sed to write to an apache configuration file from stdin. I am using sed in this script to get around the bash script limition where the calling user does not have privilegess to write to the file, so I can't simply echo "..." >> outputfile.conf

Here is what I have for writing to the file:

echo "<VirtualHost *:80>
 ...
</VirtualHost>" | sudo sed -n "w/etc/apache2/sites-available/000-default.conf"

How can I later append to this same file?

if $enable_ssl; then
 echo "<VirtualHost *:443>
 ...
 </VirtualHost>" | sudo sed <opions-to-sed-here>
fi

bash shell-script sed

share|improve this question

edited 8 hours ago

Maverik Minett

asked 8 hours ago

Maverik MinettMaverik Minett

1122 bronze badges

New contributor

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

echo "<VirtualHost *:80>
 ...
</VirtualHost>" | sudo sed -n "w/etc/apache2/sites-available/000-default.conf"

if $enable_ssl; then
 echo "<VirtualHost *:443>
 ...
 </VirtualHost>" | sudo sed <opions-to-sed-here>
fi

share|improve this question

edited 8 hours ago

Maverik Minett

asked 8 hours ago

Maverik MinettMaverik Minett

1122 bronze badges

New contributor

Maverik Minett 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 8 hours ago

Maverik Minett

asked 8 hours ago

Maverik MinettMaverik Minett

1122 bronze badges

New contributor

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

asked 8 hours ago

Maverik MinettMaverik Minett

1122 bronze badges

New contributor

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

asked 8 hours ago

Maverik MinettMaverik Minett

1122 bronze badges

3 Answers
3

active

oldest

votes

3

The usual replacement for shell > with higher/different privileges is:

echo "replace file content with this line" | sudo tee protectedFile >/dev/null

And if you want to append, use -a:

echo "append this line to file" | sudo tee -a protectedFile >/dev/null

share|improve this answer

answered 5 hours ago

IsaacIsaac

15.1k11 gold badge2525 silver badges6464 bronze badges

add a comment
 | 

2

Whithout echo:

string=$'"<VirtualHost *:443> 
 ... 
 </VirtualHost>"'

sudo sed -i '$a'"$string"'' file

The -i option tells sed to process a files in-place (optionally adding a suffix to the original version).

The sed script:

1. 
   $ match last line


2. 
   a append text after matching line

It won't work on an empty file though (since there won't be any lines of input to match the last line).

share|improve this answer

edited 5 hours ago

peterph

24.5k22 gold badges4949 silver badges6363 bronze badges

answered 6 hours ago

guillermo chamorroguillermo chamorro

93911 silver badge1414 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I'm not sure why you have the double single quote at the end of the sed command?
  
  – Grump
  5 hours ago
  

  
  
  
  

add a comment
 | 

0

For completeness, if you have ed at hand:

echo "$
a
<VirtualHost *:80>
...
</VirtualHost>
.
w" | sudo ed protectedFile

1. 
   $ go to last line


2. 
   a append, followed by data you want to append terminated by a line containing a single dot


3. 
   w stands for write (file)
   

The first two commands can be concatenated (yielding $a), yet this won't work on empty file – separately it will, since it means "go to last line" (which is a no-op), followed by "append" rather than "append to last line", which doesn't really exist.

share|improve this answer

answered 4 hours ago

peterphpeterph

24.5k22 gold badges4949 silver badges6363 bronze badges

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/4.0/"u003ecc by-sa 4.0 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
);



);

Maverik Minett is a new contributor. Be nice, and check out our Code of Conduct.

draft saved

draft discarded

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

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f545149%2fusing-sed-to-append-to-end-of-a-file%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

3

The usual replacement for shell > with higher/different privileges is:

echo "replace file content with this line" | sudo tee protectedFile >/dev/null

And if you want to append, use -a:

echo "append this line to file" | sudo tee -a protectedFile >/dev/null

share|improve this answer

answered 5 hours ago

IsaacIsaac

15.1k11 gold badge2525 silver badges6464 bronze badges

add a comment
 | 

3

The usual replacement for shell > with higher/different privileges is:

echo "replace file content with this line" | sudo tee protectedFile >/dev/null

And if you want to append, use -a:

echo "append this line to file" | sudo tee -a protectedFile >/dev/null

share|improve this answer

answered 5 hours ago

IsaacIsaac

15.1k11 gold badge2525 silver badges6464 bronze badges

add a comment
 | 

The usual replacement for shell > with higher/different privileges is:

echo "replace file content with this line" | sudo tee protectedFile >/dev/null

And if you want to append, use -a:

echo "append this line to file" | sudo tee -a protectedFile >/dev/null

share|improve this answer

answered 5 hours ago

IsaacIsaac

15.1k11 gold badge2525 silver badges6464 bronze badges

echo "replace file content with this line" | sudo tee protectedFile >/dev/null

echo "append this line to file" | sudo tee -a protectedFile >/dev/null

share|improve this answer

answered 5 hours ago

IsaacIsaac

15.1k11 gold badge2525 silver badges6464 bronze badges

answered 5 hours ago

IsaacIsaac

15.1k11 gold badge2525 silver badges6464 bronze badges

answered 5 hours ago

IsaacIsaac

15.1k11 gold badge2525 silver badges6464 bronze badges

2

Whithout echo:

string=$'"<VirtualHost *:443> 
 ... 
 </VirtualHost>"'

sudo sed -i '$a'"$string"'' file

The -i option tells sed to process a files in-place (optionally adding a suffix to the original version).

The sed script:

1. 
   $ match last line


2. 
   a append text after matching line

It won't work on an empty file though (since there won't be any lines of input to match the last line).

share|improve this answer

edited 5 hours ago

peterph

24.5k22 gold badges4949 silver badges6363 bronze badges

answered 6 hours ago

guillermo chamorroguillermo chamorro

93911 silver badge1414 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I'm not sure why you have the double single quote at the end of the sed command?
  
  – Grump
  5 hours ago
  

  
  
  
  

add a comment
 | 

2

Whithout echo:

string=$'"<VirtualHost *:443> 
 ... 
 </VirtualHost>"'

sudo sed -i '$a'"$string"'' file

The -i option tells sed to process a files in-place (optionally adding a suffix to the original version).

The sed script:

1. 
   $ match last line


2. 
   a append text after matching line

It won't work on an empty file though (since there won't be any lines of input to match the last line).

share|improve this answer

edited 5 hours ago

peterph

24.5k22 gold badges4949 silver badges6363 bronze badges

answered 6 hours ago

guillermo chamorroguillermo chamorro

93911 silver badge1414 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I'm not sure why you have the double single quote at the end of the sed command?
  
  – Grump
  5 hours ago
  

  
  
  
  

add a comment
 | 

Whithout echo:

string=$'"<VirtualHost *:443> 
 ... 
 </VirtualHost>"'

sudo sed -i '$a'"$string"'' file

The -i option tells sed to process a files in-place (optionally adding a suffix to the original version).

The sed script:

1. 
   $ match last line


2. 
   a append text after matching line

It won't work on an empty file though (since there won't be any lines of input to match the last line).

share|improve this answer

edited 5 hours ago

peterph

24.5k22 gold badges4949 silver badges6363 bronze badges

answered 6 hours ago

guillermo chamorroguillermo chamorro

93911 silver badge1414 bronze badges

string=$'"<VirtualHost *:443> 
 ... 
 </VirtualHost>"'

sudo sed -i '$a'"$string"'' file

share|improve this answer

edited 5 hours ago

peterph

24.5k22 gold badges4949 silver badges6363 bronze badges

answered 6 hours ago

guillermo chamorroguillermo chamorro

93911 silver badge1414 bronze badges

edited 5 hours ago

peterph

24.5k22 gold badges4949 silver badges6363 bronze badges

edited 5 hours ago

peterph

24.5k22 gold badges4949 silver badges6363 bronze badges

answered 6 hours ago

guillermo chamorroguillermo chamorro

93911 silver badge1414 bronze badges

answered 6 hours ago

guillermo chamorroguillermo chamorro

93911 silver badge1414 bronze badges

0

For completeness, if you have ed at hand:

echo "$
a
<VirtualHost *:80>
...
</VirtualHost>
.
w" | sudo ed protectedFile

1. 
   $ go to last line


2. 
   a append, followed by data you want to append terminated by a line containing a single dot


3. 
   w stands for write (file)
   

The first two commands can be concatenated (yielding $a), yet this won't work on empty file – separately it will, since it means "go to last line" (which is a no-op), followed by "append" rather than "append to last line", which doesn't really exist.

share|improve this answer

answered 4 hours ago

peterphpeterph

24.5k22 gold badges4949 silver badges6363 bronze badges

add a comment
 | 

0

For completeness, if you have ed at hand:

echo "$
a
<VirtualHost *:80>
...
</VirtualHost>
.
w" | sudo ed protectedFile

1. 
   $ go to last line


2. 
   a append, followed by data you want to append terminated by a line containing a single dot


3. 
   w stands for write (file)
   

The first two commands can be concatenated (yielding $a), yet this won't work on empty file – separately it will, since it means "go to last line" (which is a no-op), followed by "append" rather than "append to last line", which doesn't really exist.

share|improve this answer

answered 4 hours ago

peterphpeterph

24.5k22 gold badges4949 silver badges6363 bronze badges

add a comment
 | 

For completeness, if you have ed at hand:

echo "$
a
<VirtualHost *:80>
...
</VirtualHost>
.
w" | sudo ed protectedFile

1. 
   $ go to last line


2. 
   a append, followed by data you want to append terminated by a line containing a single dot


3. 
   w stands for write (file)
   

The first two commands can be concatenated (yielding $a), yet this won't work on empty file – separately it will, since it means "go to last line" (which is a no-op), followed by "append" rather than "append to last line", which doesn't really exist.

share|improve this answer

answered 4 hours ago

peterphpeterph

24.5k22 gold badges4949 silver badges6363 bronze badges

echo "$
a
<VirtualHost *:80>
...
</VirtualHost>
.
w" | sudo ed protectedFile

share|improve this answer

answered 4 hours ago

peterphpeterph

24.5k22 gold badges4949 silver badges6363 bronze badges

answered 4 hours ago

peterphpeterph

24.5k22 gold badges4949 silver badges6363 bronze badges

answered 4 hours ago

peterphpeterph

24.5k22 gold badges4949 silver badges6363 bronze badges