Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

savelog(8)


NAME

   savelog - save a log file

SYNOPSIS

   savelog  [-m  mode] [-u user] [-g group] [-t] [-p] [-c cycle] [-l] [-j]
   [-J] [-1 .. -9] [-C] [-d] [-l] [-r rolldir] [-n] [-q]  [-D  dateformat]
   file ...

DESCRIPTION

   The  savelog  command  saves  and  optionally  compresses old copies of
   files.  Older versions of file are named:

          file.<number><compress_suffix>

   where <number> is the version number,  0  being  the  newest.   Version
   numbers  > 0 are compressed unless -l prevents it.  Version number 0 is
   not compressed because a process might still have file opened for  I/O.
   Only cycle versions of the file are kept.

   If the file does not exist and -t was given, it will be created.

   For  files  that  do  exist  and  have  lengths  greater than zero, the
   following actions are performed:

   1)     Version numbered files are cycled.  Version file.2 is  moved  to
          version  file.3,  version file.1 is moved to version file.2, and
          so on.  Finally version file.0 is moved to version  file.1,  and
          version file is deleted.  Both compressed names and uncompressed
          names are cycled, regardless of -l.  Missing version  files  are
          ignored.

   2)     The  new  file.1 is compressed unless the -l flag was given.  It
          is changed subject to the -m, -u, and -g flags.

   3)     The main file is moved to file.0.

   4)     If the -m, -u, -g,  -t, or -p flags are  given,  then  an  empty
          file  is  created subject to the given flags.  With the -p flag,
          the file is created with the same owner, group, and  permissions
          as before.

   5)     The new file.0 is changed subject to the -m, -u, and -g flags.

OPTIONS

   -m mode
          chmod the log files to mode, implies -t

   -u user
          chown log files to user, implies -t

   -g group
          chgrp log files to group, implies -t

   -c cycle
          Save cycle versions of the logfile (default: 7). The cycle count
          must be at least 2.

   -t     touch new logfile into existence

   -l     don't compress any log files (default: do compress)

   -p     preserve owner, group, and permissions of logfile

   -j     compress with bzip2 instead of gzip

   -J     compress with xz instead of gzip

          For xz no strength option is set, and xz decides on the  default
          based  on the total amount of physical RAM. Note that xz can use
          a very large amount of memory for the higher compression levels.

   -1 .. -9
          compression strength or memory usage (default: 9, except for xz)

   -C     force cleanup of cycled logfiles

   -d     use standard date for rolling

   -D dateformat
          override date format, in the form of [MMDDhhmm[[CC]YY][.ss]]

   -r     use rolldir instead of . to roll files

   -n     do not rotate empty files

   -q     be quiet

BUGS

   If a process is still writing to file.0, and savelog moves it to file.1
   and compresses it, data could be lost.

SEE ALSO

   logrotate(8)



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.



Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.



Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.



Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner