sed -n '21592,23591p' log
perl -pi -e 's/str1/str2/g' log
prstat -s size -n 10
prstat -s cpu -n 10
ls -lR | sort -bn +4 (smallest to largest)
ls -lR | sort -bnr +4 (largest to smallest)
find . -name "*" -exec gzgrep "str" {} \;
find . -type f -mtime +3 -size +20480 -print
du -k . | sort -nr | head -20
df -h
/usr/ucb/ps auxwww
nohup ./program > log 2>&1 &
