MAKE_SHA1



MAKE_SHA1

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
FILES
AUTHORS

*

NAME

make_sha1 − Generate SHA1 checksums for given set of users.

SYNOPSIS

make_sha1 [ −C config-file ] [ −D md5_dir ] [ −k count ] [ −f input_file ] [ −m offset ] [ −M modulo ] [ −v ] [ userid... ]

DESCRIPTION

Generate SHA1 checksums for messages given set of users. Works as incremental update: reads in existing set of SHA1 checksums from sha1_dir/u/userid (hashed on first letter of userid) if that file exists. Scans account looking for new messages, and then updates record.

The SHA1 checksums which are generated are used to test integrity of the master, replica and backup systems on Hermes.

OPTIONS

−C config-file

Read configuration options from config-file.

−D sha1_dir

Read and write SHA1 checksums from sha1_dir, overrides configuration file setting of the same name.

−k count

Concurrency level: run up to count asynchronous child processes.

−f input_file

List of accounts to process: use in place of command line arguments.

−m offset

Regenerate given fraction of the user database in combination with −M below.

−M modulo

Regenerate SHA1 checksums for given fraction of user database. Allows for rolling consisency checks.

−v

Verbose mode.

FILES

/etc/imapd.conf

AUTHORS

David Carter (dpc22@cam.ac.uk)






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.