How do I read a file line by line using KSH shell scripting under UNIX like operating systems?
You can use the while loop and read command to read a text file line by line under KSH.
KSH read while loop syntax
#!/bin/ksh file="/path/to/file.txt" # while loop while read line do # display line or do somthing on $line echo "$line" done <"$file"
In this example, you are reading file separated by | fields. Sample domains.txt:
cyberciti.biz|220.127.116.11 nixcraft.com|18.104.22.168 theos.in|22.214.171.124 cricketnow.in|126.96.36.199 vivekgite.com|188.8.131.52
#!/bin/ksh # set the Internal Field Separator to a pipe symbol IFS='|' # file name file=/tmp/domains.txt # use while loop to read domain and ip while read domain ip do print "$domain has address $ip" done <"$file"
However, following is recommend syntax to set the Internal field separator (see discussion below):
#!/bin/ksh # file name file=/tmp/domains.txt # use while loop to read domain and ip # set the Internal Field Separator to a pipe symbol while IFS=\| read domain ip do print "$domain has address $ip" done <"$file"
- ksh man page
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