addhead | addtail | count | difflines | filter | head | joinlines | linelen | load | ofilter | perline | printloop | replace | run | runloop | snapto | sort | strings | tail | xed | xex | xreplace | Команда: head sfk head [-lines=n] [-f[ollow] [filename]
sfk ... +[t]head [-lines=n]
1. print first lines of a file, optionally following changes.
to use file content processing, provide a single filename.
2. print first text lines procuded by a previous command.
to process chain text thead is recommended.
options
-lines=n print first n lines (default is 10).
-follow or -f waits for file changes, rereading from start.
to post-process head output, e.g. with +filter, always
add +loop at the end of the command sequence.
head checks both file size and time for changes.
-altsize use a different method to determine the file size
(stat instead of seek). may help if the default method
fails to read the file, or to improve performance.
see also
sfk filter -head=n read and search first n lines of text files.
sfk view GUI tool to view all text files of a folder, then jump
through file heads by ctrl+pageDown.
web reference
http://stahlworks.com/sfk-head
examples
sfk head readme.txt
print first 10 lines of readme.txt
type myfile.txt | sfk filter +thead -lines=50
filter first 50 lines from stdin, via sfk filter.
sfk head -follow status.txt +filt -high Red error +loop
show changes in status.txt, highlight "error" in red. |
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