That depends on the industry and the company for the administrators, and whether or not they are certified on those platforms.
It could go either way.
Linux, Solaris x64
Linux is the leading operating system and has far more users than Solaris.
The Nintendo DSi does not use either Linux or a Unix variant, such as Solaris. It uses a custom firmware built in-house by Nintendo.
The Linux administrator is called the "root" user.
Linux is generally easier to install today. I experienced considerable difficulty in my last attempted install of Solaris 10 on a SunBlade 150.
82 => Linux swap / Solaris 83 => Linux ext2 & ext3 85 => Linux Extended partition
Linux System Administrator's Guide was created in 2005.
Linux Network Administrator's Guide was created in 2005.
Linux The others are proprietary.
Probably because Sun (the makers of Solaris) only half-heartedly attempt to even market it. They are all too happy to sell you a server, and they'll support both Linux and Solaris on it. Given the popularity of Linux for servers, and that they give you a choice, which do you think will be chosen the most often? I do think that Solaris has a lot to offer, but I think any advancement will be made by another company marketing their own OpenSolaris distro.
A Linux system administrator can verify that the Linux system is forwaring IPV4 packets by querying the sysctl kernel to see if forwarding is enabled.
The jobs ones could have that involve Linux are as diverse as the uses of Linux itself. If you are a computer programmer, you could write drivers for new devices (Linux is very popular in the embedded filed), port commercial games to Linux (like id Software does), or program a database that runs on Linux. If you are more interested in maintenance, you could become the administrator of a web server.