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up vote 5 down vote favorite

I try to remove string from .bash_profile. String is added when my shell script run:

My string at bash_profile as follows:

# for Myapllication
export MYAPP_HOME=/opt/myapp

I want to remove the strings from .bash_profile when myapp is removed via rpm.

How to remove any string from a file via shell script? (or possible alternative method)

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4 Answers 4

up vote 6 down vote accepted

You can remove a string from a text file with sed (others tools exist).

For example:

sed -i -e '/myapp/d' .bash_profile

removes from .bash_profile every line containing the string myapp.

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up vote 10 down vote

A file like ~/.bash_profile lives in a home directory of a user. Such a file is completely under control of the user. Global acting commands like rpm are not supposed to change such files.

  • You usually have a base configuration file, which is delivered by the rpm package.

  • You then have a global configuration file which can be used by root to overwrite some preferences specific to the given system.

  • Then you have personal configuration files in your home directory which you can use to override the global setting with your personal preferences.

A command like rpm should only change the first one and never change the latter.

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Can you suggest a URL to examine for this topic? –  Gyhot May 29 '13 at 15:20
1  
@Gyhot unix.stackexchange.com/questions/77518/… is a good one. If your target distribution has a /etc/profile.d directory, drop a file containing that export line there. Otherwise, you may edit /etc/profile, but be very careful not to wreck customizations by the system administrator. –  Gilles May 29 '13 at 21:10
up vote 3 down vote 
sed -i '/^export MYAPP_HOME=\/opt\/myapp$/d' ~/.bash_profile
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up vote 0 down vote

Try the vim-way:

ex -s +"g/MYAPP_HOME/d" -cwq file.txt
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