$ cat test.txt Frank Testing 1 Hello World TesT 123 Testing
bogon:awk-test lihex$ awk '{ print $1 }' test.txt Frank Testing Hello TesT 123 bogon:awk-test lihex$ awk '{ print $1.$2 }' test.txt Frank Testing1 HelloWorld TesT 123Testing bogon:awk-test lihex$ awk '{ print $1.$2.txt }' test.txt Frank Testing1 HelloWorld TesT 123Testing bogon:awk-test lihex$ awk '/Test/{ print}' test.txt Testing 1 123 Testing bogon:awk-test lihex$ awk '/[a-z]/{ print}' test.txt Frank Testing 1 Hello World TesT 123 Testing bogon:awk-test lihex$ awk '/[0-9]/{ print}' test.txt bogon:awk-test lihex$ awk '{ print $1 }' test.txt Frank Testing Hello TesT 123 bogon:awk-test lihex$ awk '{ print $1.$2 }' test.txt Frank Testing1 HelloWorld TesT 123Testing bogon:awk-test lihex$ awk '{ print $1.$2.txt }' test.txt Frank Testing1 HelloWorld TesT 123Testing bogon:awk-test lihex$ awk '/Test/{ print}' test.txt Testing 1 123 Testing bogon:awk-test lihex$ awk '/[a-z]/{ print}' test.txt Frank Testing 1 Hello World TesT 123 Testing bogon:awk-test lihex$ awk '/[0-9]/{ print}' test.txt Testing 1 123 Testing bogon:awk-test lihex$ awk '/[0-9]$/{ print}' test.txt Testing 1 bogon:awk-test lihex$ awk '{ if($1 ~ /123/) print }' test.txt 123 Testing bogon:awk-test lihex$ awk '{ if($2 ~ /[0-9]/) print }' test.txt Testing 1 bogon:awk-test lihex$ grep -i test test.txt Testing 1 TesT 123 Testing bogon:awk-test lihex$ vim test.txt bogon:awk-test lihex$ cat test.txt Frank:Perez Testing 1:Testing 2 Hello World:Hi World TesT:OMG 123 Testing:456 Testing bogon:awk-test lihex$ awk -F: '{ print $1 }' test.txt Frank Testing 1 Hello World TesT 123 Testing Testing 1 123 Testing bogon:awk-test lihex$ awk '/[0-9]$/{ print}' test.txt Testing 1 bogon:awk-test lihex$ awk '{ if($1 ~ /123/) print }' test.txt 123 Testing bogon:awk-test lihex$ awk '{ if($2 ~ /[0-9]/) print }' test.txt Testing 1 bogon:awk-test lihex$ grep -i test test.txt Testing 1 TesT 123 Testing bogon:awk-test lihex$ cat test.txt Frank:Perez Testing 1:Testing 2 Hello World:Hi World TesT:OMG 123 Testing:456 Testing bogon:awk-test lihex$ awk -F: '{ print $1 }' test.txt Frank Testing 1 Hello World TesT 123 Testing