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Another way: for i in `ls newestconfigs/ | grep confg`
do
awk '
/^hostname/ { host=$2 ; next }
/^interface (Loopback0|Vlan80)/ { getIp=1 ; next }
getIp { print host ": " $2 ;...

ls | awk -F'_' ' { arr[$1]++ } END {for(i in arr) { print i, arr[i] } } '

Try if i understand you correctly...

ls -1 | awk -F\_ '{print $1,++arr[$1]}'