If you’ve recently built a system with a broadcom wireless configuration with Ubuntu and noticed your wireless networks are nowhere to be found, then you’ll need to update your drivers (specifically adding wl). This page will probably help: http://www.broadcom.com/docs/linux_sta/README.txt It is a pain, but once it is configured it generally works.
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To search and replace a string using grep at the linux CLI, you can do the following: grep -rl "string-to-match" directory/ | xargs sed -i 's/string1/string2/g'
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