Several UCSC data tracks are downloaded in BigWig format (.bw). This is a compressed file that cannot be read by common text editors. Rather, you need to use utilities built to handle these files. Several are available at the ftp website: http://hgdownload.cse.ucsc.edu/admin/exe/linux.x86_64/. Here are a few UNIX programs I have found useful:
Welcome to the Genome Toolbox! I am glad you navigated to the blog and hope you find the contents useful and insightful for your genomic needs. If you find any of the entries particularly helpful, be sure to click the +1 button on the bottom of the post and share with your colleagues. Your input is encouraged, so if you have comments or are aware of more efficient tools not included in a post, I would love to hear from you. Enjoy your time browsing through the Toolbox.