bash-3.00# passwd stfaChanging password for “stfa”stfa’s New password:Enter the new password again: Any time a password needs to be changed, whether by a regular user or the superuser, the passwd command is used. Normally an ordinary user on the system can change his or her own password (but nobody else’s). When invoked, the user is […]
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Create an account for user renay with a home directory of /home/renay, which is to be created. Use /etc/skel as the skeleton directory and /usr/bin/sh as the shell. Take the next highest UID. # useradd -m -s /usr/bin/sh renay Create an account for a user named Tracy. Tracy’s primary group is staff. Tracy is also
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The system administrator is responsible for the smooth day-to-day operation of the system, as well as for responding to and correcting large and small emergencies that may occur. In addition, the system administrator is usually the person responsible for making sure that there is a plan in place to recover the system and the data
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The swap command provides a method of adding, deleting, and monitoring the swap areas used by the kernel. Swap area changes made from the command line are not permanent and are lost after a reboot. To create permanent additions to the swap space, create an entry in the /etc/vfstab file. The entry in the /etc/vfstab
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Virtual memory combines RAM and dedicated disk storage areas known as swap space. Virtual memory management software maps copies of files on disk to virtual addresses. Programs use these virtual addresses rather than real addresses to store instructions and data. Virtual memory makes it possible for the operating system (OS) to use a large range
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Volumes are virtual devices (virtual objects) that appear to be physical disks to applications, databases and file systems. Volumes are the VxVM software’s top-tier virtual objects. Although volumes appear to be physical disks, they do not share the limitations of physical disks. Volumes have the following characteristics: Volumes are directly addressed by the Solaris OE.
The VxVM software virtual objects built from subdisks are called plexes. A plex consists of one or more subdisks located on one or more VxVM software disks.Plexes are: Also known as submirrors Mid-tier building blocks of the VxVM software volumes Named based on the name of the volume for which it is a submirror, plus
Subdisks are contiguous blocks of space. Subdisks provide the basic building blocks for the VxVM software plexes and volumes, creating the VxVM software basic unit of storage allocation. Subdisks are virtual objects.The following characteristics apply to subdisks: Subdisk storage is allocated from the public region of a VxVM software disk. A VxVM software disk can
A named collection of VxVM software disks that share a common configuration is called a disk group. Common configuration refers to a set of records that provide detailed information about related VxVM software objects, their connections and attributes. This configuration information is stored in the private region of the VxVM software disks. A backup copy
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When a physical disk is brought under VxVM software control, it is either initialized or encapsulated. Initialized Disks Initialized disks are reformatted with either one or two partitions, and all data is destroyed. The partitions are used to store the VxVM software configuration and data areas called private and public regions. The private region is
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