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Solaris Interview Questions with Answers

> Which file to be configuring the logs messages ? (like: /var/adm/message etc…)

> Which file maintain the kernel ?
# /etc/path_to_inst

This will be quite complicative, because kernel is the core of the operating system, its an image of the OS. whereas /etc/path_to_inst are the drivers are stored for the enabled hardware.

> How will see the kernel version ?
Ok banner --> This will not show the Kernel
Ok .version --> This will tell the open boot prompt version otherwords, FIRMWARE
# prtconf –V
# showrev --> will show the installed patches
# uname –x

> How will see the hostname ?

> How will compare 2 host patches ?
Through ftp copy the copied files nad use dd command to compare both the host patches.
use the command called "diff"
How will see the version of the patches
# showrev –p
# patchadd –P

> How will check patches installed ?
# showrev –p --> This is the correct one
# patchadd –P
# patchrm : to remove the patch
# patchad –d (patch no ) : to install the patch

> How will you view the packages?
#pkginfo | more

> When user logging in which file will take place ?

> Default path for patches ?
# /var/sadm/patch

> How many fields in passwd, shadow and group files ?
7 inPasswd: username:passwd:uid:gid:commentfiled:homedirectory:loginshell
9 in shadow: useraccount:passwd:lastchange:min:max:warring:inactivity:expiration:flag
4 in group: username:passwd:gid:user

> Syntax for useradd commad
# useradd –u 101 –g other –d /export/home/ragu –m –s /bin/ksh –c "revenue" ragu

> What is difference between g G while creating useradd?
Small "g" is primary group
Capital "G" is for secondary group

> We have edit the /etc/passwd file and modify a user forget to give the shell will user able to loging?
If Passwd –f option given In which files it will update.

> How many filed in /etc/vfstab ?
7 fileds

After creating swap file update the same to /etc/vfstab what will be the fstype.

> How will you clear the soft error on disk ?
# format à analyst & verify à read /write

> How to modify the user from ragu to haz ?
# usermod –d /export/home/haz –m –l haz ragu

> How will you find out enough memory?
# /use/platform/sun4u/sbin/prtdiag
# prtconf | grep –i mem

> What command can be used in running a background process?
# nohup ( comment ) &

> How will you rectify the root passwd in solaris ?
Boot through cdrom 1/3 cd in single user mode.
Ok boot cdrom-s
# mount –F ufs /dev/rdsk/c0t0d0s6 /mnt
# cd mnt
#set TERM=vt100
#export TERM --> If you dont give, vi editor won't start properly
# vi /etc/shadow (remove the passwd entry and save the file)
# umount /mnt
# reboot ( While system come up it will ask the new root passwd.)

> If the system panic or system not booting ?
Boot through cdrom 1/3 cd in single user mode.
Ok boot cdrom-s
# mount –F ufs /dev/rdsk/c0t0d0s0 /mnt
# cd mnt
# installboot /usr/platform/'uname-i/lib/fs/ufs/bootblk /dev/rdsk/c00t0d0s0
# umount mnt
# boot –r

> Explain /etc/inittab files ?
It will have 4 fields( id, rstat, action, process)
Respawn : Restart daemon if killed
Off : Don't start the daemon if killed
Once: Run once
Wait: Wait for the process to be completed before processing the next line in /etc/inittab

> How will you ad new aliases name ?
# vi /etc/mail/aliases ( enter the aliases name (eg) service:servicedesk@hotmail.com
# newaliases
# /usr/lib/sendmail –v –b (aliases name)

> What are printer daemon ?
# /etc/inetd.conf --> This is an services daemons
# in.lpd daemon

> Explain inode ?
It contain the information of the files and directory
Like ( date, home directory, rights, modified date, etc)

> Explain /etc/system file ?
It will control the kernel modules and it dived into 5 sector
Moddir : default loadable kernel modules
Root.devices & root files configuration : Physical path name of the devices
Exclude: Does not load the kernel during kernel initializing
Forceload: Force the kernel module to load
Set: set maxium user =40

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