LRZIP is a compression program that can achieve very high compression ratios and speed when used with large files. It uses the combined compression algorithms of lzma for maximum compression, lzo for maximum speed, and the long range redundancy reduction of rzip. It is designed to scale with increases with RAM size, improving compression further. A choice of either size or speed optimizations allows for either better compression than even lzma can provide, or better speed than gzip, but with bzip2 sized compression levels.
monitor the performance of your computers, networks, SANs, applications, [...]. It makes it easy to determine "what's different today" when a performance problem crops up. It makes it easy to see how you're doing capacity-wise on any resources.
fwknop stands for "Firewall Knock Operator." It implements a method similar to Single Packet Authorization, claiming to provide the advantages of port knocking without the replay succeptability.
The target directory ends up a copy of the source directory, but extra reverse diffs are stored in a special subdirectory of that target directory, so you can still recover files lost some time ago.
The Package Tracking System web interface puts together a lot of information about each source package. It features many useful links (BTS, QA stats, contact information, DDTP translation status, buildd logs) and gathers much more information from various
dd_rescue is a tool to help you to save data from crashed partition. It tries to read and if it fails, it will go on with the next sectors where tools like dd will fail.
Utility programs to control and monitor drives using the Self-Monitoring, Analysis and Reporting Technology System (SMART) built into most modern ATA and SCSI hard disks. In many cases, these utilities will provide advanced warning of disk degradation an
Magic Rescue scans a block device for file types it knows how to recover and calls an external program to extract them. It looks at "magic bytes" in file contents, so it can be used both as an undelete utility and for recovering a corrupted drive or parti
This site will provide you with a DNS report for your domain. A very large percentage of domains have DNS problems; this site will help you find those problems and fix them.
ssldump is an SSLv3/TLS network protocol analyzer. It identifies TCP connections on the chosen network interface and attempts to interpret them as SSLv3/TLS traffic. When it identifies SSLv3/TLS traffic, it decodes the records and displays them in a textual form to stdout. If provided with the appropriate keying material, it will also decrypt the connections and display the application data traffic.
In this first in a series of four tutorials on the 101 exam, Daniel introduces you to bash (the standard Linux shell), shows you how to take full advantage of standard Linux commands such as ls, cp, and mv, explains Linux's permission and ownership model,
The libstatgrab library provides an easy-to-use interface for accessing system statistics and information. Available statistics include CPU, Load, Memory, Swap, Disk I/O, and Network I/O. It was developed to work on Linux, FreeBSD, and Solaris. The packag
XEN allows you to run multiple virtual servers on one physical machine. Small shell scripts are provided that help you install, backup and remove domains. The install script bootstraps Debian Linux to a new LVM-partition and sets up the networking so tha
xenConsole (aka xcon) is a curses-based tty/console monitor for Xen 2.0 in a full-screen interface with additional domain information from SNMP, colours and somewhat realtime updates.
This article is intended mainly for developers who are new to Xen and who want to know more about it. The first two sections, however, are general and do not deal with code.
Conspy allows a (possibly remote) user to see what is displayed on a Linux virtual console, and send keystrokes to it. Unlike VNC, conspy does not require a server to be installed prior to being used.
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