1z0-821 Exam Dumps - Oracle Solaris Questions and Answers

On POSIX-compliant platforms, SIGTERM is the signal sent to a process to request its termination. The symbolic constant for SIGTERM is defined in the header file signal.h. Symbolic signal names are used because signal numbers can vary across platforms, however on the vast majority of systems, SIGTERM is signal #15.

SIGTERM is the default signal sent to a process by the kill or killall commands. It causes the termination of a process, but unlike the SIGKILL signal, it can be caught and interpreted (or ignored) by the process. Therefore, SIGTERM is akin to asking a process to terminate nicely, allowing cleanup and closure of files. For this reason, on many Unix systems during shutdown, init issues SIGTERM to all processes that are not essential to powering off, waits a few seconds, and then issues SIGKILL to forcibly terminate any such processes that remain.

Pgrep takes a process name and return a PID.

Note: pgrep looks through the currently running processes and lists the process IDs which matches the selection criteria to stdout. All the criteria have to match. For example, pgrep -u root sshd will only list the processes called sshd AND owned by root.

Incorrec answers:

ps bigscript: You can’t pass a name to ps, it interprets it as arguments.

Add a memory cap.

zonecfg:my-zone> add capped-memory

Set the memory cap.

zonecfg:my-zone:capped-memory> set physical=50m

End the memory cap specification.

zonecfg:my-zone:capped-memory> end

An “f” in the F column indicates the package is frozen. If a package is frozen, you can only install or update to packages that match the frozen version. 

Note: The “i” in the I column indicates that these packages are installed in this image.

Adding and Updating Oracle Solaris 11 Software Packages, Showing Package Install State Information

A: ZFS can automatically share file systems by setting the sharenfs property. Using this property, you do not have to modify the /etc/dfs/dfstab file when a new file system is shared. The sharenfs property is a comma-separated list of options to pass to the share command. The value on is an alias for the default share options, which provides read/write permissions to anyone. The value off indicates that the file system is not managed by ZFS and can be shared through traditional means, such as the /etc/dfs/dfstab file. All file systems whose sharenfs property is not off are shared during boot.

Boot

With this form, boot loads and executes the program specified by the default boot arguments from the default boot device

Note: boot has the following general format:

boot [device-specifier] [arguments]

where device-specifier and arguments are optional.

The process of subnetting involves the separation of the network and subnet portion of an address from the host identifier. This is performed by a bitwise AND operation between the IP address and the (sub)network prefix. The result yields the network address or prefix, and the remainder is the host identifier.

The routing prefix of an address is written in a form identical to that of the address itself. This is called the network mask, or netmask, of the address. For example, a specification of the most-significant 18 bits of an IPv4 address, 11111111.11111111.11000000.00000000, is written as 255.255.192.0.

A: Solaris uses a UID (User ID) to identify each user account. The UID is a unique number assigned to each user. It is usually assigned by the operating system when the account is created.

B: In Solaris the account name can include any alphanumeric string (and . _ -). The maximum length is 8 characters.

IPv6 defines three address types:

unicast

Identifies an interface of an individual node.

multicast

Identifies a group of interfaces, usually on different nodes. Packets that are sent to the multicast address go to all members of the multicast group.

anycast

Identifies a group of interfaces, usually on different nodes. Packets that are sent to the anycast address go to the anycast group member node that is physically closest to the sender.