When adding or removing hardware in a Solaris system, it may be necessary to perform a reconfiguration boot. During this boot, the system discovers new hardware and recreates the file /etc/path_to_inst which contains mappings of physical devices to logical instance numbers.
Runtime control scripts start and stop services when the system changes run levels. Well constructed rc scripts handle at least start and stop as command line arguments.
UNIX treats the end of line differently than other operating systems. Sometimes when editing files in both Windows and UNIX environments, a CTRL-M character is visibly displayed at the end of each line as ^M in vi.
The default login shell for the Solaris superuser root is /sbin/sh, a statically linked Bourne shell. This shell is not dependent on any other files to run. The usual user shells like /usr/bin/ksh are dynamically linked and are dependent on library files. If the root login shell is changed from /sbin/sh to a non-static shell, root will not be able to log into the system if certain filesystems cannot mount. A simple addition to root’s /.profile will change the shell safely.
UNIX has wonderfully powerful text processing capabilities. There are numerous ways to solve the same problem. Frequently, for example, it is necessary to extract a single column of data from a text file or output stream. This tech-recipe will present several solutions to this problem.
By default, the files replaced by the application of a patch in Solaris are preserved to enable removal of the patch and restoration of the system to its pre-patched state.
The office shortcut bar is one of the most useless pieces of code ever created. This tech-recipe explains how to uninstall it.
The version of tar in most Linux distributions supports gzip compression. This means that a gzipped tar file can be extracted in one simple command.
Solaris allows multiple virtual or logical interfaces to exist with different IP addresses on the same physical interface. Virtual interfaces are created or plumbed up using the plumb directive in ifconfig. They are unplumbed using the unplumb directive.
Solaris 8 and 9 have a powerful, integrated mechanism originally available only in trusted environments. Role based access control (RBAC) implements an authorization system based on least privilege. In this model, multiple administrative roles can be created and associated with users such that an individual has only the access necessary to perform their delegated tasks such as restarting privileged services, rebooting the system, or managing the print queue. RBAC allows finer grain control of implementing security policies. This recipe is the first of a series about RBAC and provides an introduction to its components.
AIM is an easy and free way to send SMS text messages.
This tech-recipe describes how to easily redirect a web visitor using meta refresh.
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