How to Use Awk to Find and Sort Text in Linux, GnuCash
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awk is a splendid Unix scripting language for processing text files. The version included in most Linux distros is GNU awk, or gawk for short. I like it for pulling data from ordered data sets, such as text lists and CSV exports from spreadsheets. awk sees each line in a file as a separate record, and each item in a line as a separate field, which makes it possible to slice and dice your files in all kinds of flexible ways. The classic way to illustrate this is with /etc/passwd; this example prints the whole contents:
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