Cisco IOS tcl simple script to use instead of interface level configuration

Example:

tclsh
set area 0
ios_config "router os 1" "router-id [ lindex [exec "sh ip int b lo0 | exclude face"] 1 ] "
foreach i {
Lo0
Et0/0
Et0/1
} { ios_config "router os 1" "net [ lindex [exec "sh ip int b $i | exclude face"] 1 ] 0.0.0.0 area $area"
}

Cisco IOS tclsh oneliner to configure vrf on interface

Example:
ios_config "int Et0/0" "ip vrf for VPNA" [exec "sh run int Et0/0 | i addr"]

More advanced stuff:
foreach i {
Et0/0.10
Et0/0.20
Et0/0.33
Tu1
s1/0
} { ios_config "int $i" "ip vrf for VPNA" [exec "sh run int $i | i addr"] }