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1

Here's an example of a very simple code snippet that I'd like to paste to my terminal in a way that everything is executed.

sudo apt update
sudo apt upgrade


sudo apt -y install build-essential
sudo apt -y install git
sudo apt -y install libxml2-dev # required for some tools using xml files

sudo apt autoremove

Unfortunately, what happens if build-essential wasn't installed beforehand is that it only runs until sudo apt -y install build-essential. The subsequent lines are skipped. The same is true if git wasn't installed: It'll run until the git line, then skip the rest.

What's the reason for this happening, and is there a way to fix this problem without having to create a script file and running it via bash?

bash sudo clipboard

share|improve this question

edited yesterday

0xSheepdog

1,6041924

asked yesterday

MichaelMichael

83

New contributor

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

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Trying to understand... If the build-essential were to fail, would you want to continue executing the other items?
  
  – roaima
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, since you're (probably) running these commands via bash, is there a particular problem with creating a script and running that?
  
  – roaima
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Basically, I'm just trying to understand what it is exactly that prevents this snippet from being fully executed (line by line) by pasting it into the Unix terminal.
  
  – Michael
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I have a collection of Unix shell snippets and I need to have a basic understanding of when pasting snippets into the terminal works, and when it doesn't.
  
  – Michael
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  does apt install build-essential prompt for input during the installation?
  
  – Jeff Schaller♦
  yesterday
  

  
  
  
  

 | 
show 6 more comments

1

Here's an example of a very simple code snippet that I'd like to paste to my terminal in a way that everything is executed.

sudo apt update
sudo apt upgrade


sudo apt -y install build-essential
sudo apt -y install git
sudo apt -y install libxml2-dev # required for some tools using xml files

sudo apt autoremove

Unfortunately, what happens if build-essential wasn't installed beforehand is that it only runs until sudo apt -y install build-essential. The subsequent lines are skipped. The same is true if git wasn't installed: It'll run until the git line, then skip the rest.

What's the reason for this happening, and is there a way to fix this problem without having to create a script file and running it via bash?

bash sudo clipboard

share|improve this question

edited yesterday

0xSheepdog

1,6041924

asked yesterday

MichaelMichael

83

New contributor

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

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Trying to understand... If the build-essential were to fail, would you want to continue executing the other items?
  
  – roaima
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also, since you're (probably) running these commands via bash, is there a particular problem with creating a script and running that?
  
  – roaima
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Basically, I'm just trying to understand what it is exactly that prevents this snippet from being fully executed (line by line) by pasting it into the Unix terminal.
  
  – Michael
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I have a collection of Unix shell snippets and I need to have a basic understanding of when pasting snippets into the terminal works, and when it doesn't.
  
  – Michael
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  does apt install build-essential prompt for input during the installation?
  
  – Jeff Schaller♦
  yesterday
  

  
  
  
  

 | 
show 6 more comments

Here's an example of a very simple code snippet that I'd like to paste to my terminal in a way that everything is executed.

sudo apt update
sudo apt upgrade


sudo apt -y install build-essential
sudo apt -y install git
sudo apt -y install libxml2-dev # required for some tools using xml files

sudo apt autoremove

Unfortunately, what happens if build-essential wasn't installed beforehand is that it only runs until sudo apt -y install build-essential. The subsequent lines are skipped. The same is true if git wasn't installed: It'll run until the git line, then skip the rest.

What's the reason for this happening, and is there a way to fix this problem without having to create a script file and running it via bash?

bash sudo clipboard

share|improve this question

edited yesterday

0xSheepdog

1,6041924

asked yesterday

MichaelMichael

83

New contributor

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

sudo apt update
sudo apt upgrade


sudo apt -y install build-essential
sudo apt -y install git
sudo apt -y install libxml2-dev # required for some tools using xml files

sudo apt autoremove

share|improve this question

edited yesterday

0xSheepdog

1,6041924

asked yesterday

MichaelMichael

83

New contributor

Michael 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 yesterday

0xSheepdog

1,6041924

asked yesterday

MichaelMichael

83

New contributor

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

edited yesterday

0xSheepdog

1,6041924

edited yesterday

0xSheepdog

1,6041924

asked yesterday

MichaelMichael

83

New contributor

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

asked yesterday

MichaelMichael

83

2 Answers
2

active

oldest

votes

2

Assuming you are still within sudo's credential cache timeout (if you are unsure, just refresh it with sudo -v before running the snippet), that problem happens because apt(-get) is a very rich console application and thus consumes stdin even when it asks you nothing because of the -y.

You can work around that by running the whole snippet in a subshell:

At the prompt, start by typing a ( then paste the snippet then type the closing ) and press return

It should go.

Notice how the snippet is not executed as soon as you paste it. It rather gets “queued” on the command line, waiting for the closing parentheses.

(PS: depending on your system you may need to use apt-get autoremove in place of apt autoremove, and you may also need to use -y on update and upgrade too)

share|improve this answer

edited yesterday

answered yesterday

LL3LL3

1565

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Awesome, that did it! So basically sudo and apt are complex commands that have a tendency to eat up input. Gotcha. Just one comment: apt autoremove exists and works. Also, an alternative workaround I found is to concatenate the commands via && (ensuring the next line always is only executed if the previous succeeded) and to either write all commands on a single line, or to use the escape character .
  
  – Michael
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ugh.. It's really about time to update my system then.. apt autoremove does not work for me..! :-(
  
  – LL3
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Michael Of course those ways and a few others work too, but you wanted to just copy&paste it ;-)
  
  – LL3
  yesterday
  

  
  
  
  

add a comment | 

1

If there is sufficient time between the sudo apt upgrade command and the sudo apt install -y build-essentials command, then SUDO will prompt for your password again.

Because you are pasting text into the console, the next line(s) will be accepted as STDIN to the SUDO prompt for a password. If the line does not match your password, authentication will fail and the build-essentials line will not be executed.

share|improve this answer

answered yesterday

0xSheepdog0xSheepdog

1,6041924

add a comment | 

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2

Assuming you are still within sudo's credential cache timeout (if you are unsure, just refresh it with sudo -v before running the snippet), that problem happens because apt(-get) is a very rich console application and thus consumes stdin even when it asks you nothing because of the -y.

You can work around that by running the whole snippet in a subshell:

At the prompt, start by typing a ( then paste the snippet then type the closing ) and press return

It should go.

Notice how the snippet is not executed as soon as you paste it. It rather gets “queued” on the command line, waiting for the closing parentheses.

(PS: depending on your system you may need to use apt-get autoremove in place of apt autoremove, and you may also need to use -y on update and upgrade too)

share|improve this answer

edited yesterday

answered yesterday

LL3LL3

1565

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Awesome, that did it! So basically sudo and apt are complex commands that have a tendency to eat up input. Gotcha. Just one comment: apt autoremove exists and works. Also, an alternative workaround I found is to concatenate the commands via && (ensuring the next line always is only executed if the previous succeeded) and to either write all commands on a single line, or to use the escape character .
  
  – Michael
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ugh.. It's really about time to update my system then.. apt autoremove does not work for me..! :-(
  
  – LL3
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Michael Of course those ways and a few others work too, but you wanted to just copy&paste it ;-)
  
  – LL3
  yesterday
  

  
  
  
  

add a comment | 

2

Assuming you are still within sudo's credential cache timeout (if you are unsure, just refresh it with sudo -v before running the snippet), that problem happens because apt(-get) is a very rich console application and thus consumes stdin even when it asks you nothing because of the -y.

You can work around that by running the whole snippet in a subshell:

At the prompt, start by typing a ( then paste the snippet then type the closing ) and press return

It should go.

Notice how the snippet is not executed as soon as you paste it. It rather gets “queued” on the command line, waiting for the closing parentheses.

(PS: depending on your system you may need to use apt-get autoremove in place of apt autoremove, and you may also need to use -y on update and upgrade too)

share|improve this answer

edited yesterday

answered yesterday

LL3LL3

1565

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Awesome, that did it! So basically sudo and apt are complex commands that have a tendency to eat up input. Gotcha. Just one comment: apt autoremove exists and works. Also, an alternative workaround I found is to concatenate the commands via && (ensuring the next line always is only executed if the previous succeeded) and to either write all commands on a single line, or to use the escape character .
  
  – Michael
  yesterday
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  ugh.. It's really about time to update my system then.. apt autoremove does not work for me..! :-(
  
  – LL3
  yesterday
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @Michael Of course those ways and a few others work too, but you wanted to just copy&paste it ;-)
  
  – LL3
  yesterday
  

  
  
  
  

add a comment | 

Assuming you are still within sudo's credential cache timeout (if you are unsure, just refresh it with sudo -v before running the snippet), that problem happens because apt(-get) is a very rich console application and thus consumes stdin even when it asks you nothing because of the -y.

You can work around that by running the whole snippet in a subshell:

At the prompt, start by typing a ( then paste the snippet then type the closing ) and press return

It should go.

Notice how the snippet is not executed as soon as you paste it. It rather gets “queued” on the command line, waiting for the closing parentheses.

(PS: depending on your system you may need to use apt-get autoremove in place of apt autoremove, and you may also need to use -y on update and upgrade too)

share|improve this answer

edited yesterday

answered yesterday

LL3LL3

1565

share|improve this answer

edited yesterday

answered yesterday

LL3LL3

1565

answered yesterday

LL3LL3

1565

answered yesterday

LL3LL3

1565

1

If there is sufficient time between the sudo apt upgrade command and the sudo apt install -y build-essentials command, then SUDO will prompt for your password again.

Because you are pasting text into the console, the next line(s) will be accepted as STDIN to the SUDO prompt for a password. If the line does not match your password, authentication will fail and the build-essentials line will not be executed.

share|improve this answer

answered yesterday

0xSheepdog0xSheepdog

1,6041924

add a comment | 

1

If there is sufficient time between the sudo apt upgrade command and the sudo apt install -y build-essentials command, then SUDO will prompt for your password again.

Because you are pasting text into the console, the next line(s) will be accepted as STDIN to the SUDO prompt for a password. If the line does not match your password, authentication will fail and the build-essentials line will not be executed.

share|improve this answer

answered yesterday

0xSheepdog0xSheepdog

1,6041924

add a comment | 

If there is sufficient time between the sudo apt upgrade command and the sudo apt install -y build-essentials command, then SUDO will prompt for your password again.

Because you are pasting text into the console, the next line(s) will be accepted as STDIN to the SUDO prompt for a password. If the line does not match your password, authentication will fail and the build-essentials line will not be executed.

share|improve this answer

answered yesterday

0xSheepdog0xSheepdog

1,6041924

share|improve this answer

answered yesterday

0xSheepdog0xSheepdog

1,6041924

answered yesterday

0xSheepdog0xSheepdog

1,6041924

answered yesterday

0xSheepdog0xSheepdog

1,6041924