Ubuntu – How to use grep output as a path for cd

To use grep for two different lines, search for both patterns

$ grep -e sweet -e lemon file_type
This is a sweet
lemon.

Or use alternation

$ grep -E 'sweet|lemon' file_type
This is a sweet
lemon.

To get the next line after a pattern, you could use the context option

$ grep -A1 sweet file_type
This is a sweet
lemon.

But if you're searching explicitly for a multiline pattern, that's tricky because grep thinks in lines.... Your .* will catch everything between "sweet" and "lemon" on the line. We can get "lemon" on the next line with -P using \n to match the newline and by telling grep the file is null separated with -z:

$ grep -zPo 'This is a sweet\nlemon' file_type
This is a sweet
lemon.

Notes:

• -E Use extended regular expressions (to use | character for alternation without needing to escape it)
• -An Print additional lines after the pattern, where n is the number of trailing lines to print
• -P Use perl-style regular expressions ("experimental" in grep - install pcregrep instead for better perl regex support)
• -z Use the null character as separator (just pretending in this case, but grep will take our word for it)
• -o only print the matched part

pip 8.1.1 is the version of python-pip from the default Ubuntu 16.04 repositories. When installing a package with pip set the HOME environment variable to the home directory specified by the target user's password database entry by using the option -H.

In the question you linked to two different versions of pip were installed. To find out why pip -V returns a more up-to-date version of pip (pip 9.0.1) which is also installed, run the following commands:

sudo -H pip -V

This command returns pip 8.1.1 from /usr/lib/python2.7/dist-packages (python 2.7) in a default Ubuntu 16.04 installation. The command sudo -H pip3 -V returns pip 8.1.1 from /usr/lib/python3/dist-packages (python 3.5) in a default Ubuntu 16.04 installation.

which python3  

This command returns /usr/bin/python3 in a default Ubuntu 16.04 installation.

which pip

This command returns /usr/bin/pip in a default Ubuntu 16.04 installation. The command which pip3 returns /usr/bin/pip3 in a default Ubuntu 16.04 installation.