bash script use cut command at variable and store result at another variable

Question

I have a config txt file with IP addresses as content like this  10 10 10 1 80 10 10 10 13 8080 10 10 10 11 443 10 10 10 12 80   I want to ping every ip address in that file     bin bash file config txt  for line in  cat  file  do     this line is not correct  should strip  port and store to ip var   ip  line cut -d   -f1   ping  ip done   I m a beginner  sorry for such a question but I couldn t find it out myself

User · Answer

You can avoid the loop and cut etc by using   awk -F       system  ping    1     config txt   However it would be better if you post a snippet of your config txt

User · Answer

The awk solution is what I would use  but if you want to understand your problems with bash  here is a revised version of your script     bin bash -vx    config file with ip addresses like 10 10 10 1 80 file config txt  while read line   do     this line is not correct  should strip  port and store to ip var   ip    echo  quot  line quot   cut -d   -f1     ping  ip done  lt    file   You could write your top line as for line in   cat  file    do       but not recommended   You needed command substitution          to get the value assigned to  ip reading lines from a file is usually considered more efficient with the while read line     done  lt    file  pattern  I hope this helps

[bash] bash script use cut command at variable and store result at another variable

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