In a file , how to retrieve the lines which are the
multiples of 50 ? like 50,100,150th lines etc.
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Answer / ganeswar bojanapu
Here is simply command
sed -n '50~50'p filename
Is This Answer Correct ? | 4 Yes | 0 No |
Answer / shivu
i=50
lines=`wc -l file | cut -d" " -f1`
while [ "$i" -le "$lines" ]
do
head -n $i file | tail -1
i=`expr $i + 50`
done
It works for anything.. :)
Is This Answer Correct ? | 3 Yes | 5 No |
Answer / shivu
root@chandru-VirtualBox:~# egrep "^[0-9]*[0|5]0" file
50
100
150
200
250
300
350
400
450
500
501
502
503
504
505
506
507
508
509
550
600
650
700
750
800
850
900
950
1000
But the below one is
root@chandru-VirtualBox:~# egrep "^[0-9][0|5][0]" file
100
150
200
250
300
350
400
450
500
550
600
650
700
750
800
850
900
950
1000
This is also not correct. up to some extend it is ok.
Is This Answer Correct ? | 1 Yes | 4 No |
Hello all, This is my assignment on shell scripting, can anyone help me regarding this ? Create a shell script which connects to the database In second shell script include the first script for the DB connection Create a table (PRADEEP_DATA) with 2 columns (name, value) In Third shell script include the first script for the DB connection And insert/delete the values from the Table, by accepting input from the user This functionality should be a menu driven Program: 1) Insert to the database a. Name b. value 2)Delete from the database a.Name b.value Exception handling needs to be taken care.
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