diff --git a/providers/ec2/tasks/apt.py b/providers/ec2/tasks/apt.py
index 1f5d8d3..3da13c5 100644
--- a/providers/ec2/tasks/apt.py
+++ b/providers/ec2/tasks/apt.py
@@ -30,7 +30,8 @@ class AptUpgrade(Task):
 	def run(self, info):
 		rc_policy_path = os.path.join(info.root, 'usr/sbin/policy-rc.d')
 		with open(rc_policy_path, 'w') as rc_policy:
-			rc_policy.write('#!/bin/sh\nexit 101')
+			rc_policy.write(('#!/bin/sh\n'
+			                 'exit 101'))
 		import stat
 		os.chmod(rc_policy_path,
 		         stat.S_IRUSR | stat.S_IWUSR | stat.S_IXUSR |
diff --git a/providers/ec2/tasks/boot.py b/providers/ec2/tasks/boot.py
index a489268..29a610d 100644
--- a/providers/ec2/tasks/boot.py
+++ b/providers/ec2/tasks/boot.py
@@ -28,7 +28,8 @@ class ConfigureGrub(Task):
 
 		from common.tools import sed_i
 		grub_def = os.path.join(info.root, 'etc/default/grub')
-		sed_i(grub_def, '^GRUB_TIMEOUT=[0-9]+', 'GRUB_TIMEOUT=0\nGRUB_HIDDEN_TIMEOUT=true')
+		sed_i(grub_def, '^GRUB_TIMEOUT=[0-9]+', 'GRUB_TIMEOUT=0\n'
+		                                        'GRUB_HIDDEN_TIMEOUT=true')
 
 		from common.tools import log_check_call
 		log_check_call(['chroot', info.root, 'update-grub'])
@@ -42,7 +43,8 @@ class BlackListModules(Task):
 	def run(self, info):
 		blacklist_path = os.path.join(info.root, 'etc/modprobe.d/blacklist.conf')
 		with open(blacklist_path, 'a') as blacklist:
-			blacklist.write('# disable pc speaker\nblacklist pcspkr')
+			blacklist.write(('# disable pc speaker\n'
+			                 'blacklist pcspkr'))
 
 
 class DisableGetTTYs(Task):
diff --git a/providers/ec2/tasks/filesystem.py b/providers/ec2/tasks/filesystem.py
index c9f5284..9d07caa 100644
--- a/providers/ec2/tasks/filesystem.py
+++ b/providers/ec2/tasks/filesystem.py
@@ -120,6 +120,6 @@ class ModifyFstab(Task):
 			mount_opts.append('nobarrier')
 		fstab_path = os.path.join(info.root, 'etc/fstab')
 		with open(fstab_path, 'a') as fstab:
-			fstab.write(('/dev/xvda1 /     {filesystem}    {mount_opts} 1 1'
+			fstab.write(('/dev/xvda1 /     {filesystem}    {mount_opts} 1 1\n'
 			             .format(filesystem=info.manifest.volume['filesystem'].lower(),
 			                     mount_opts=','.join(mount_opts))))
diff --git a/providers/ec2/tasks/network.py b/providers/ec2/tasks/network.py
index 4fdecb5..0910608 100644
--- a/providers/ec2/tasks/network.py
+++ b/providers/ec2/tasks/network.py
@@ -18,9 +18,12 @@ class ConfigureNetworkIF(Task):
 
 	def run(self, info):
 		interfaces_path = os.path.join(info.root, 'etc/network/interfaces')
-		if_config = {'squeeze': ('auto lo\niface lo inet loopback\n'
-		                         'auto eth0\niface eth0 inet dhcp'),
-		             'wheezy':  'auto eth0\niface eth0 inet dhcp'}
+		if_config = {'squeeze': ('auto lo\n'
+		                         'iface lo inet loopback\n'
+		                         'auto eth0\n'
+		                         'iface eth0 inet dhcp\n'),
+		             'wheezy':  'auto eth0\n'
+		                        'iface eth0 inet dhcp\n'}
 		with open(interfaces_path, 'a') as interfaces:
 			interfaces.write(if_config.get(info.manifest.system['release']))