#! /usr/bin/env bash # # A diff canonifier that removes all connection UIDs. awk ' BEGIN { FS="\t"; OFS="\t"; } /^[^#]/ { if ( column > 0 ) { $column = "XXXXXXXXXXX"; } } /^#fields/ { for ( i = 2; i <= NF; ++i ) { if ( $i == "uid" ) column = i - 1; } } { print } '