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How to make a bash function persist (after reboot)?

How to make bash history prefix-sensitive?How to make exported shell variables permanent?How to get environment variables to persist across login?How to reboot the machine when it hangs?Linux + how to shutdown application properly with reboot or init 0 + init.d scriptsWhy the command in .bash_logout can't run after reboot?How to make the command in /etc/profile be found?How to make bash substitution $(<“filename”) silentHow execute command/script once after rebootLS_COLORS how persist after sudo su

0

The command is

Show() cat /etc/redhat-release; 

How to make this command persist after reboot?

bash shell scripting

share|improve this question

edited Mar 11 '18 at 7:03

Kusalananda

134k17255418

asked Mar 9 '18 at 9:35

Shubham SinghShubham Singh

12

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  As you can see from the current answers, we are unsure what you mean by "persist". You question was also originally tagged with ssh (I removed that tag). Please let us know if ssh is somehow relevant to you question.
  
  – Kusalananda
  Mar 9 '18 at 9:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you for clarifying that by "make this command persist" you mean "make it still be defined after a reboot".
  
  – Kusalananda
  Mar 11 '18 at 7:03
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Look at declare -f Show and make a SaveFunc helper to save the functions giving by their name into e.g. the ~/.bash_funcs.d directory. Then add some white magic to bash's startup scripts to read in all functions defined in that directory.
  
  – yeti
  Mar 11 '18 at 9:40
  
  

  
  
  
  

add a comment | 

0

The command is

Show() cat /etc/redhat-release; 

How to make this command persist after reboot?

bash shell scripting

share|improve this question

edited Mar 11 '18 at 7:03

Kusalananda

134k17255418

asked Mar 9 '18 at 9:35

Shubham SinghShubham Singh

12

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  As you can see from the current answers, we are unsure what you mean by "persist". You question was also originally tagged with ssh (I removed that tag). Please let us know if ssh is somehow relevant to you question.
  
  – Kusalananda
  Mar 9 '18 at 9:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thank you for clarifying that by "make this command persist" you mean "make it still be defined after a reboot".
  
  – Kusalananda
  Mar 11 '18 at 7:03
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Look at declare -f Show and make a SaveFunc helper to save the functions giving by their name into e.g. the ~/.bash_funcs.d directory. Then add some white magic to bash's startup scripts to read in all functions defined in that directory.
  
  – yeti
  Mar 11 '18 at 9:40
  
  

  
  
  
  

add a comment | 

The command is

Show() cat /etc/redhat-release; 

How to make this command persist after reboot?

bash shell scripting

share|improve this question

edited Mar 11 '18 at 7:03

Kusalananda

134k17255418

asked Mar 9 '18 at 9:35

Shubham SinghShubham Singh

12

Show() cat /etc/redhat-release; 

share|improve this question

edited Mar 11 '18 at 7:03

Kusalananda

134k17255418

asked Mar 9 '18 at 9:35

Shubham SinghShubham Singh

12

share|improve this question

edited Mar 11 '18 at 7:03

Kusalananda

134k17255418

asked Mar 9 '18 at 9:35

Shubham SinghShubham Singh

12

edited Mar 11 '18 at 7:03

Kusalananda

134k17255418

edited Mar 11 '18 at 7:03

Kusalananda

134k17255418

asked Mar 9 '18 at 9:35

Shubham SinghShubham Singh

12

asked Mar 9 '18 at 9:35

Shubham SinghShubham Singh

12

2 Answers
2

active

oldest

votes

6

To make a function definition persist after reboot, you do same thing as you would do to add or modify persistent shell aliases and/or environment variables: You edit your shell initialization files.

If you add your function definition in ~/.bashrc (or wherever you usually define aliases), it will be available for use in the next interactive bash shell session.

share|improve this answer

edited 3 hours ago

answered Mar 9 '18 at 9:49

KusalanandaKusalananda

134k17255418

add a comment | 

-2

A simple while should work

while true; do 
 cat /etc/redhat-release; 
 sleep 2
done

I would recommend the use of a sleep statement to ensure sufficient lag.

share|improve this answer

edited 4 hours ago

Rui F Ribeiro

41.2k1481140

answered Mar 9 '18 at 9:50

amisaxamisax

1,527515

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  How on earth does this relate to the question? I can't find a way to interpret “persist” as meaning “run in a loop”.
  
  – Gilles
  Mar 9 '18 at 11:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  your original question asked for ssh persist. It came out as a endless ssh into a server and watch its release file (for whatever reason).
  
  – amisax
  Mar 9 '18 at 11:15
  

  
  
  
  

add a comment | 

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6

To make a function definition persist after reboot, you do same thing as you would do to add or modify persistent shell aliases and/or environment variables: You edit your shell initialization files.

If you add your function definition in ~/.bashrc (or wherever you usually define aliases), it will be available for use in the next interactive bash shell session.

share|improve this answer

edited 3 hours ago

answered Mar 9 '18 at 9:49

KusalanandaKusalananda

134k17255418

add a comment | 

6

To make a function definition persist after reboot, you do same thing as you would do to add or modify persistent shell aliases and/or environment variables: You edit your shell initialization files.

If you add your function definition in ~/.bashrc (or wherever you usually define aliases), it will be available for use in the next interactive bash shell session.

share|improve this answer

edited 3 hours ago

answered Mar 9 '18 at 9:49

KusalanandaKusalananda

134k17255418

add a comment | 

To make a function definition persist after reboot, you do same thing as you would do to add or modify persistent shell aliases and/or environment variables: You edit your shell initialization files.

If you add your function definition in ~/.bashrc (or wherever you usually define aliases), it will be available for use in the next interactive bash shell session.

share|improve this answer

edited 3 hours ago

answered Mar 9 '18 at 9:49

KusalanandaKusalananda

134k17255418

share|improve this answer

edited 3 hours ago

answered Mar 9 '18 at 9:49

KusalanandaKusalananda

134k17255418

answered Mar 9 '18 at 9:49

KusalanandaKusalananda

134k17255418

answered Mar 9 '18 at 9:49

KusalanandaKusalananda

134k17255418

-2

A simple while should work

while true; do 
 cat /etc/redhat-release; 
 sleep 2
done

I would recommend the use of a sleep statement to ensure sufficient lag.

share|improve this answer

edited 4 hours ago

Rui F Ribeiro

41.2k1481140

answered Mar 9 '18 at 9:50

amisaxamisax

1,527515

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  How on earth does this relate to the question? I can't find a way to interpret “persist” as meaning “run in a loop”.
  
  – Gilles
  Mar 9 '18 at 11:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  your original question asked for ssh persist. It came out as a endless ssh into a server and watch its release file (for whatever reason).
  
  – amisax
  Mar 9 '18 at 11:15
  

  
  
  
  

add a comment | 

-2

A simple while should work

while true; do 
 cat /etc/redhat-release; 
 sleep 2
done

I would recommend the use of a sleep statement to ensure sufficient lag.

share|improve this answer

edited 4 hours ago

Rui F Ribeiro

41.2k1481140

answered Mar 9 '18 at 9:50

amisaxamisax

1,527515

• 
  
  
  

  
  2
  

  
  
  
  
  
  

  
  
  How on earth does this relate to the question? I can't find a way to interpret “persist” as meaning “run in a loop”.
  
  – Gilles
  Mar 9 '18 at 11:06
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  your original question asked for ssh persist. It came out as a endless ssh into a server and watch its release file (for whatever reason).
  
  – amisax
  Mar 9 '18 at 11:15
  

  
  
  
  

add a comment | 

A simple while should work

while true; do 
 cat /etc/redhat-release; 
 sleep 2
done

I would recommend the use of a sleep statement to ensure sufficient lag.

share|improve this answer

edited 4 hours ago

Rui F Ribeiro

41.2k1481140

answered Mar 9 '18 at 9:50

amisaxamisax

1,527515

while true; do 
 cat /etc/redhat-release; 
 sleep 2
done

share|improve this answer

edited 4 hours ago

Rui F Ribeiro

41.2k1481140

answered Mar 9 '18 at 9:50

amisaxamisax

1,527515

edited 4 hours ago

Rui F Ribeiro

41.2k1481140

edited 4 hours ago

Rui F Ribeiro

41.2k1481140

answered Mar 9 '18 at 9:50

amisaxamisax

1,527515

answered Mar 9 '18 at 9:50

amisaxamisax

1,527515