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if [ -n "$BASH_VERSION" -o -n "$KSH_VERSION" -o -n "$ZSH_VERSION" ]; then [ -x /usr/bin/id ] || return ID=`/usr/bin/id -u` [ -n "$ID" -a "$ID" -le 200 ] && return # for bash and zsh, only if no alias is already set alias vi >/dev/null 2>&1 || alias vi=vim fi