bash

Bash Round
chang@ACPNEW:~/tmp$ echo "scale = 5; 5+50*3/20 + (19*2)/7" | bc -l | xargs printf "%2.3f\n"
17.929

Avg
chang@ACPNEW:~/tmp$ awk '{s+=$1}END{print "ave:",s/NR}' RS=" "  avg.txt
ave: 54.646

for loop

for i in {1..50}

do

  echo $i

done

chang@ACPNEW:~/tmp$ cat b.txt | tr -s " "

tab seperated

cut -d$'\t' -f2-

chang@ACPNEW:~/tmp$ cut -d$'\t' -f2- b.txt

delete logs file older then 2 days

find /opt/all_logs/logs -mmin +2880 -exec rm {} \;