How to do things
AI Noob vs. Pro
Free Open Source:
a command line
free external tools,
- download the free Swiss File Knife Base from Sourceforge. - open the Windows CMD command line, Mac OS X Terminal or Linux shell. - OS X : type mv sfk-mac-64.exe sfk and chmod +x sfk then ./sfk - Linux: type mv sfk-linux-64.exe sfk and chmod +x sfk then ./sfk OS X and Linux syntax may differ, check the help within the tool.
sfk tail [-lines=n] [-f[ollow] [filename] sfk ... +[t]tail [-lines=n] 1. print last lines of a file, optionally following changes. to use file content processing, provide a single filename. 2. print last text lines procuded by a previous command. to process chain text ttail is recommended. options -lines=n print last n lines (default is 10). -follow or -f waits for file changes, printing them endlessly. if file is recreated or shrunk, rereads the last lines. to post-process tail output, e.g. with +filter, always add +loop at the end of the command sequence. -nowait if tail is reached multiple times in a chain by +loop then do not wait for a file size change but force stepping of the command chain. -quiet do not tell verbosely about read restarts. -polltime=n with -follow, specifies the delay in milliseconds before the file is checked again for changes. default is 500. -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. -verbose tell in detail what is done. see also sfk filter -tail=n read and search last n lines of text files. sfk view GUI tool to view all text files of a folder, then jump through file ends by ctrl+end. web reference http://stahlworks.com/sfk-tail examples sfk tail -follow logs\access.log immediately lists last lines, then all added lines over time. sfk tail -f c:\temp\log.txt +filter -+error: -+warning: +loop endless filter of error and warning messages from log.txt. example sfk script with conditional execution file logfilter.txt: sfk label checklog +tail -follow logfile.txt +tee toterm +storetext +filter -+error: -justrc +if "rc>0" call myalert +gettext +filter -+alldone: -justrc +if "rc>0" stop +loop +end sfk label myalert +then run -yes "myalert.bat" +end sfk script logfilter.txt will run myalert.bat whenever errors appear in logfile.txt. the script stops as soon as "alldone" appears in the log. to allow double filtering of the chain text it must be stored before the first filter, then restored. scripted example if you want to both tail and filter on several phrases, the command may become hard to read and to edit. as an alternative, you may put it into a batch embedded sfk script, e.g. under windows, create a file filtlog.bat: @echo off sfk script filtlog.bat -from begin goto xend sfk label begin +tail -f log.txt +filter -high red error:* -high yellow warning:* -high blue debug:* +loop :xend then type "filtlog". creating command sequences this way allows better readability, and easy editing in any editor. see also sfk filter - all options for selection and post-processing of text sfk partcopy - copy byte block from the beginning of a file sfk script - how to create script files with sfk commands sfk samp - ready-to-use templates for windows and linux scripts
sfk is a free open-source tool, running instantly without installation efforts. no DLL's,
no registry changes - just get sfk.exe from the zip package and use it (binaries for
windows, linux and mac are included).
read more about all sfk functions here.