Linux – Recursively add directory to $PATH variable

linux

Is it possible to recursively add a directory to my $PATH variable? Let's say I have a directory structure like the following:

/usr/local/bin
    - /nodejs-x.x
    - /redis-x.x
    - /mongodb-x-x

Can I add /usr/local/bin to the $PATH and allow it to recursively cover the subdirectories?

Best Answer

Not directly, no. Entries in $PATH are not recursive.

What you can do is:

for d in /usr/local/bin/*/; do
    PATH+=":$d"
done

Another option is to put symlinks in /usr/local/bin:

cd /usr/local/bin
ln -s myapp-1.2/myapp myapp

Related Solutions

Linux – How to recursively remove subdirectories and files, but not the first parent directory

The previous answer is almost correct. However, you shouldn't quote the shell glob characters if you want them to work. So, this is the command you're looking for:

rm -rf "/target/directory with spaces/"*

Note that the * is outside of the double quotes. This form would also work:

rm -rf /target/directory\ with\ spaces/*

If you have the * in quotes as shown above, then it will only attempt to remove the single file literally named * inside the target directory.

Linux – Batch Update Symbolic Links Recursively

This bash command should do it for you:

find /home/user/public_html/qa/ -type l -lname '/home/user/public_html/dev/*' -printf 'ln -nsf "$(readlink "%p" | sed s/dev/qa/)" "$(echo "%p" | sed s/dev/qa/)"\n' > script.sh

It uses find to identify all files in the qa directory that are symbolic links with a target that's in the dev directory, and for each one, it prints out a bash command that will replace the link with a link to the equivalent path in qa/. After you run this, just execute the generated script with

bash script.sh

You might want to examine it manually first to make sure it worked.

Here's a more verbose version of the above find command for easier reading (though I wouldn't necessarily write it this way in practice):

SRC_DIR="/home/user/public_html/qa"
OLD_TARGET="/home/user/public_html/dev"
SUB="s/dev/qa/"

find $SRC_DIR -type l \
  -lname "$OLD_TARGET/*" -printf \
  'ln -nsf "$(readlink "%p"|sed $SUB)" "$(echo "%p"|sed $SUB)"\n'\
 > script.sh

Best Answer

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Linux – How to recursively remove subdirectories and files, but not the first parent directory

Linux – Batch Update Symbolic Links Recursively

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