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retail - tail with regular expressions retail can output that part of a file (or pipe) following the last match of a regular expression, which can be useful for logfiles and various other kinds of data. It is also a fully compliant implementation of the POSIX.1-2008 tail command, so you can theoretically replace your system tail with it. retail is GPL3. To build: ./configure make make install (optionally) By default, it installs into ~/.local/bin, but that can be changed using ./configure --prefix=/path/here. After that, retail -r REGEX FILE will output that part of FILE starting at the last match of POSIX extended regular expression REGEX. If -u REGEX2 is also given, it will exit after outputting a line matching REGEX2. It also supports the standard options to tail, along with some extensions. Usage: ./retail [OPTION]... [FILE] Print the last 10 lines of FILE to standard output. If no FILE given or FILE is -, use standard input. Options: -b with -r, begin at first matching line, not last. -c N print the last N bytes; -c +N will begin with the Nth byte -f continue reading from file as data is appended -n N output the last N lines; -n +N will begin with the Nth line -r REGEX output lines beginning with last line matching extended regular expression REGEX -u REGEX stop following file when a line matches extended regular expression REGEX, and exit. --help display help and exit --version display version information and exit The -r and -u options take an extended POSIX regular expression as argument. These expressions are matched against each line without implicit anchoring. ^ and $ will match the start and end of a line respectively. -u is meaningful only when joined with -f, and will output the matching line before terminating.