Use full operating system commands for Apps Dba's

uname command
-a, --all
print all information
-m, --machine
print the machine (hardware) type
-n, --nodename
print the machine's network node hostname
-r, --release
print the operating system release
-s, --sysname
print the operating system name
-p, --processor
print the host processor type
-v print the operating system version

Tar
nohup tar xzvf &
Will run the job in background

RAM Command For Verious OS

HP/UX swapinfo -tm
Solaris prtconf|grep -i mem
AIX lsdeev -C|grep mem & lsattr -El mem0
DEC-UNIX uerf -r 300|grep -i mem
Linux free

To identify the O/S Bit version in Sun

/bin/isainfo -kv
64-bit sparcv9 kernel modules

To identify the Zombie process in Sun

ps -elf | grep -w Z ===> zombie

For deleting the log files on date format

ls -ltr |grep "Jun 5"|awk '{print $9}'|xargs rm -rf {} \;