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How to append code verbatim to .bashrc?

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5

As an example: When installing pyenv, you're required to add

export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

to your .bashrc file.

However, the usual echo '..' >> ~/.bashrc will evaluate the statements before appending. How do you properly append such statements to a file using the command line without evaluation?

command-line bash bashrc

share|improve this question

asked May 7 at 15:36

bhnnbhnn

1314

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  This will not evaluate the commands, it will only print them into your ~/.bashrc. Either provide more information about your system and setup, or open ~/.bashrc in a text editor and write the lines by hand
  
  – j-money
  May 7 at 17:33
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @j-money This was merely meant as an example. I have noticed that there may be a discrepancy between the results of using echo '..' vs echo .. and as such, simply piping line by line into the file may indeed solve the issue. Nevertheless, steeldriver has provided a concise and scalable solution.
  
  – bhnn
  May 7 at 23:13
  

  
  
  
  

add a comment | 

5

As an example: When installing pyenv, you're required to add

export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

to your .bashrc file.

However, the usual echo '..' >> ~/.bashrc will evaluate the statements before appending. How do you properly append such statements to a file using the command line without evaluation?

command-line bash bashrc

share|improve this question

asked May 7 at 15:36

bhnnbhnn

1314

• 
  
  
  

  
  4
  

  
  
  
  
  
  

  
  
  This will not evaluate the commands, it will only print them into your ~/.bashrc. Either provide more information about your system and setup, or open ~/.bashrc in a text editor and write the lines by hand
  
  – j-money
  May 7 at 17:33
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @j-money This was merely meant as an example. I have noticed that there may be a discrepancy between the results of using echo '..' vs echo .. and as such, simply piping line by line into the file may indeed solve the issue. Nevertheless, steeldriver has provided a concise and scalable solution.
  
  – bhnn
  May 7 at 23:13
  

  
  
  
  

add a comment | 

As an example: When installing pyenv, you're required to add

export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

to your .bashrc file.

However, the usual echo '..' >> ~/.bashrc will evaluate the statements before appending. How do you properly append such statements to a file using the command line without evaluation?

command-line bash bashrc

share|improve this question

asked May 7 at 15:36

bhnnbhnn

1314

export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"

share|improve this question

asked May 7 at 15:36

bhnnbhnn

1314

share|improve this question

asked May 7 at 15:36

bhnnbhnn

1314

asked May 7 at 15:36

bhnnbhnn

1314

asked May 7 at 15:36

bhnnbhnn

1314

3 Answers
3

active

oldest

votes

16

I'd suggest a here document

$ cat >> .bashrc <<'EOF'
export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
EOF

So long as the EOF word (which can be anything) is quoted, no shell expansion of the body takes place.

share|improve this answer

answered May 7 at 15:51

steeldriversteeldriver

72.8k11118192

add a comment | 

5

However, the usual echo '..' >> ~/.bashrc will evaluate the statements before appending. How do you properly append such statements to a file using the command line without evaluation?

No it won't. Anything inside of single-quotes is completely un-evaluated. You can use
echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bashrc without any worry that anything will be interpreted. The only character of any significance in a single-quoted string is a single-quote (which ends the string, and cannot be escaped.)

share|improve this answer

answered May 8 at 0:56

hobbshobbs

952611

add a comment | 

2

You can add in front of special characters.

For example:

echo export PATH="/home/user/.pyenv/bin:$PATH"

gives the following result:

export PATH="/home/user/.pyenv/bin:$PATH"

so the quotation marks and the $PATH are still there.

share|improve this answer

answered May 7 at 15:46

EliasElias

276112

add a comment | 

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16

I'd suggest a here document

$ cat >> .bashrc <<'EOF'
export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
EOF

So long as the EOF word (which can be anything) is quoted, no shell expansion of the body takes place.

share|improve this answer

answered May 7 at 15:51

steeldriversteeldriver

72.8k11118192

add a comment | 

16

I'd suggest a here document

$ cat >> .bashrc <<'EOF'
export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
EOF

So long as the EOF word (which can be anything) is quoted, no shell expansion of the body takes place.

share|improve this answer

answered May 7 at 15:51

steeldriversteeldriver

72.8k11118192

add a comment | 

I'd suggest a here document

$ cat >> .bashrc <<'EOF'
export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
EOF

So long as the EOF word (which can be anything) is quoted, no shell expansion of the body takes place.

share|improve this answer

answered May 7 at 15:51

steeldriversteeldriver

72.8k11118192

$ cat >> .bashrc <<'EOF'
export PATH="/home/user/.pyenv/bin:$PATH"
eval "$(pyenv init -)"
eval "$(pyenv virtualenv-init -)"
EOF

share|improve this answer

answered May 7 at 15:51

steeldriversteeldriver

72.8k11118192

answered May 7 at 15:51

steeldriversteeldriver

72.8k11118192

answered May 7 at 15:51

steeldriversteeldriver

72.8k11118192

5

However, the usual echo '..' >> ~/.bashrc will evaluate the statements before appending. How do you properly append such statements to a file using the command line without evaluation?

No it won't. Anything inside of single-quotes is completely un-evaluated. You can use
echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bashrc without any worry that anything will be interpreted. The only character of any significance in a single-quoted string is a single-quote (which ends the string, and cannot be escaped.)

share|improve this answer

answered May 8 at 0:56

hobbshobbs

952611

add a comment | 

5

However, the usual echo '..' >> ~/.bashrc will evaluate the statements before appending. How do you properly append such statements to a file using the command line without evaluation?

No it won't. Anything inside of single-quotes is completely un-evaluated. You can use
echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bashrc without any worry that anything will be interpreted. The only character of any significance in a single-quoted string is a single-quote (which ends the string, and cannot be escaped.)

share|improve this answer

answered May 8 at 0:56

hobbshobbs

952611

add a comment | 

However, the usual echo '..' >> ~/.bashrc will evaluate the statements before appending. How do you properly append such statements to a file using the command line without evaluation?

No it won't. Anything inside of single-quotes is completely un-evaluated. You can use
echo 'eval "$(pyenv virtualenv-init -)"' >> ~/.bashrc without any worry that anything will be interpreted. The only character of any significance in a single-quoted string is a single-quote (which ends the string, and cannot be escaped.)

share|improve this answer

answered May 8 at 0:56

hobbshobbs

952611

share|improve this answer

answered May 8 at 0:56

hobbshobbs

952611

answered May 8 at 0:56

hobbshobbs

952611

answered May 8 at 0:56

hobbshobbs

952611

2

You can add in front of special characters.

For example:

echo export PATH="/home/user/.pyenv/bin:$PATH"

gives the following result:

export PATH="/home/user/.pyenv/bin:$PATH"

so the quotation marks and the $PATH are still there.

share|improve this answer

answered May 7 at 15:46

EliasElias

276112

add a comment | 

2

You can add in front of special characters.

For example:

echo export PATH="/home/user/.pyenv/bin:$PATH"

gives the following result:

export PATH="/home/user/.pyenv/bin:$PATH"

so the quotation marks and the $PATH are still there.

share|improve this answer

answered May 7 at 15:46

EliasElias

276112

add a comment | 

You can add in front of special characters.

For example:

echo export PATH="/home/user/.pyenv/bin:$PATH"

gives the following result:

export PATH="/home/user/.pyenv/bin:$PATH"

so the quotation marks and the $PATH are still there.

share|improve this answer

answered May 7 at 15:46

EliasElias

276112

echo export PATH="/home/user/.pyenv/bin:$PATH"

export PATH="/home/user/.pyenv/bin:$PATH"

share|improve this answer

answered May 7 at 15:46

EliasElias

276112

answered May 7 at 15:46

EliasElias

276112

answered May 7 at 15:46

EliasElias

276112