diff --git a/Makefile b/Makefile
index ffe0241..5dbb067 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,7 @@ INFO1 = 0AA2C0
 INFO2 = 0DCAF0
 INFO3 = 3DD5F3
 
-IFACE = eth0
+IFACE ?= eth0
 
 FORMAT = SVG
 EXTENSION = .$(shell echo $(FORMAT) |tr '[:upper:]' '[:lower:]')
@@ -108,6 +108,7 @@ run:
 
 $(BUILD_DIR)/cpu-daily$(EXTENSION): cpu.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		--title "Processeur" \
 		DEF:user=$<:user:AVERAGE \
 		DEF:nice=$<:nice:AVERAGE \
 		DEF:sys=$<:sys:AVERAGE \
@@ -131,6 +132,7 @@ $(BUILD_DIR)/cpu-daily$(EXTENSION): cpu.rrd
 
 $(BUILD_DIR)/load-daily$(EXTENSION): load.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		--title "Processeur" \
 		DEF:ldavg-1=$<:ldavg-1:AVERAGE \
 		DEF:ldavg-5=$<:ldavg-5:AVERAGE \
 		DEF:ldavg-15=$<:ldavg-15:AVERAGE \
@@ -140,6 +142,7 @@ $(BUILD_DIR)/load-daily$(EXTENSION): load.rrd
 
 $(BUILD_DIR)/mem-daily$(EXTENSION): mem.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		--title "Mémoire" \
 		DEF:kbmemfree=$<:kbmemfree:AVERAGE \
 		DEF:kbbuffers=$<:kbbuffers:AVERAGE \
 		DEF:kbcached=$<:kbcached:AVERAGE \
@@ -151,6 +154,7 @@ $(BUILD_DIR)/mem-daily$(EXTENSION): mem.rrd
 
 $(BUILD_DIR)/net-daily$(EXTENSION): net.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		--title "Réseau" \
 		DEF:rbytes=$<:rbytes:AVERAGE \
 		DEF:tbytes=$<:tbytes:AVERAGE \
 		CDEF:ntbytes=tbytes,-1,* \
@@ -159,6 +163,7 @@ $(BUILD_DIR)/net-daily$(EXTENSION): net.rrd
 
 $(BUILD_DIR)/disk-daily$(EXTENSION): disk.rrd
 	rrdtool graph $@ --imgformat $(FORMAT) --end now --start end-$(DAY_IN_SECS) \
+		--title "Disque" \
 		DEF:mbfsfree=$<:mbfsfree:AVERAGE \
 		DEF:mbfsused=$<:mbfsused:AVERAGE \
 		AREA:mbfsused#$(DANGER):mbfsused:STACK \