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What would a XIR signal do to a server and why would it be used?
Reset/interrupt it. Used if server has hung.
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What is the difference between a probe-scsi and a probe-scsi-all?
Probe-scsi probes for local/onboard devices/peripherals off the onboard SCSI controller whilst probe-scsi-all identifies all devices attached to the onboard/local controller and separate Sbus , PCI controllers if present.
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What does reboot –r do?
It finds newly attached devices and entries are created in /dev & /devices and /etc/path_to_inst is updated.
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What is significant about Generic_108528-nn?
This denotes the kernel update patch level/operating system version residual on the server
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How would you find out what version of Solaris is currently running?
uname -a or uname -r
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What are the different phases in boot process?
PROM phase (post boot device loads boot block sector 0) Boot program phase (boot program loads ufsboot) Kernel Initialisation Phase (reads and initialises /etc/system start init process rc scripts)
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How will you add a virtual IP address to a server. Given the interface qe0 and IP 10.10.1.150?
# ifconfig qe0:1 plumb# ifconfig qe0:1 10.10.1.150 up
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How to restore a corrupted file system or trouble shoot bad super blocks for a FS c0t2d0s5?
Newfs –N /dev/rdsk/c0t2d0s5 (or any other slice)Fsck –o b= /dev/rdsk/c0t2d0s5
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What is the command can reconfigure devices with out reboot?
1. devfsadm2. drvconfig
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What does this file /etc/path_to_inst contain and what is the importance of this file?
It contains all the Physical Paths of devices and the instance names. The importance is that if you corrupt any paths while mirroring the disk or for any other reason Then copy from this location
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How do you check the cron jobs of other users, (as a super user)?
All users cron jobs are stored as files in this location /var/spool/cron/crontab/Username
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What is sticky bit?
When this is set on a directory, only the file in that directory can be removed or renamed if:1. User owns the directory2. User owns the file3. Super User
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How will you regain the logins (/etc/passwd) if you have corrupted the file ?
copy from /etc/opasswd, /etc/oshadow file or by the utility pwconv
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What are the basic elements of PROM and NVRAM?
PROM= Post, Generic Device Drivers, User Interface, Default Parameters NVRAM= Eeprom, Time of Day, Ehternet Addss, Hostid & Battery