diff --git a/azure/public.go b/azure/public.go
index cf1a7b20..b5c1e357 100644
--- a/azure/public.go
+++ b/azure/public.go
@@ -83,7 +83,7 @@ func (storage *PublishedStorage) String() string {
 }
 
 // MkDir creates directory recursively under public path
-func (storage *PublishedStorage) MkDir(path string) error {
+func (storage *PublishedStorage) MkDir(_ string) error {
 	// no op for Azure
 	return nil
 }
@@ -145,7 +145,7 @@ func (storage *PublishedStorage) putFile(path string, source io.Reader, sourceMD
 }
 
 // RemoveDirs removes directory structure under public path
-func (storage *PublishedStorage) RemoveDirs(path string, progress aptly.Progress) error {
+func (storage *PublishedStorage) RemoveDirs(path string, _ aptly.Progress) error {
 	filelist, err := storage.Filelist(path)
 	if err != nil {
 		return err
diff --git a/cmd/config_show.go b/cmd/config_show.go
index 119fd37f..66adc8f0 100644
--- a/cmd/config_show.go
+++ b/cmd/config_show.go
@@ -7,7 +7,7 @@ import (
 	"github.com/smira/commander"
 )
 
-func aptlyConfigShow(cmd *commander.Command, args []string) error {
+func aptlyConfigShow(_ *commander.Command, _ []string) error {
 
 	config := context.Config()
 	prettyJSON, err := json.MarshalIndent(config, "", "    ")
diff --git a/cmd/mirror_list.go b/cmd/mirror_list.go
index 1a54f433..42b802cf 100644
--- a/cmd/mirror_list.go
+++ b/cmd/mirror_list.go
@@ -24,7 +24,7 @@ func aptlyMirrorList(cmd *commander.Command, args []string) error {
 	return aptlyMirrorListTxt(cmd, args)
 }
 
-func aptlyMirrorListTxt(cmd *commander.Command, args []string) error {
+func aptlyMirrorListTxt(cmd *commander.Command, _ []string) error {
 	var err error
 
 	raw := cmd.Flag.Lookup("raw").Value.Get().(bool)
@@ -65,7 +65,7 @@ func aptlyMirrorListTxt(cmd *commander.Command, args []string) error {
 	return err
 }
 
-func aptlyMirrorListJSON(cmd *commander.Command, args []string) error {
+func aptlyMirrorListJSON(_ *commander.Command, _ []string) error {
 	var err error
 
 	repos := make([]*deb.RemoteRepo, context.NewCollectionFactory().RemoteRepoCollection().Len())
diff --git a/cmd/mirror_show.go b/cmd/mirror_show.go
index 7491b355..03179161 100644
--- a/cmd/mirror_show.go
+++ b/cmd/mirror_show.go
@@ -27,7 +27,7 @@ func aptlyMirrorShow(cmd *commander.Command, args []string) error {
 	return aptlyMirrorShowTxt(cmd, args)
 }
 
-func aptlyMirrorShowTxt(cmd *commander.Command, args []string) error {
+func aptlyMirrorShowTxt(_ *commander.Command, args []string) error {
 	var err error
 
 	name := args[0]
@@ -93,7 +93,7 @@ func aptlyMirrorShowTxt(cmd *commander.Command, args []string) error {
 	return err
 }
 
-func aptlyMirrorShowJSON(cmd *commander.Command, args []string) error {
+func aptlyMirrorShowJSON(_ *commander.Command, args []string) error {
 	var err error
 
 	name := args[0]
diff --git a/cmd/publish_list.go b/cmd/publish_list.go
index a4e0281f..f4bbb2af 100644
--- a/cmd/publish_list.go
+++ b/cmd/publish_list.go
@@ -25,7 +25,7 @@ func aptlyPublishList(cmd *commander.Command, args []string) error {
 	return aptlyPublishListTxt(cmd, args)
 }
 
-func aptlyPublishListTxt(cmd *commander.Command, args []string) error {
+func aptlyPublishListTxt(cmd *commander.Command, _ []string) error {
 	var err error
 
 	raw := cmd.Flag.Lookup("raw").Value.Get().(bool)
@@ -77,7 +77,7 @@ func aptlyPublishListTxt(cmd *commander.Command, args []string) error {
 	return err
 }
 
-func aptlyPublishListJSON(cmd *commander.Command, args []string) error {
+func aptlyPublishListJSON(_ *commander.Command, _ []string) error {
 	var err error
 
 	repos := make([]*deb.PublishedRepo, 0, context.NewCollectionFactory().PublishedRepoCollection().Len())
diff --git a/cmd/publish_show.go b/cmd/publish_show.go
index 3b9ec4e3..d943df3f 100644
--- a/cmd/publish_show.go
+++ b/cmd/publish_show.go
@@ -24,7 +24,7 @@ func aptlyPublishShow(cmd *commander.Command, args []string) error {
 	return aptlyPublishShowTxt(cmd, args)
 }
 
-func aptlyPublishShowTxt(cmd *commander.Command, args []string) error {
+func aptlyPublishShowTxt(_ *commander.Command, args []string) error {
 	var err error
 
 	distribution := args[0]
@@ -76,7 +76,7 @@ func aptlyPublishShowTxt(cmd *commander.Command, args []string) error {
 	return err
 }
 
-func aptlyPublishShowJSON(cmd *commander.Command, args []string) error {
+func aptlyPublishShowJSON(_ *commander.Command, args []string) error {
 	var err error
 
 	distribution := args[0]
diff --git a/cmd/repo_list.go b/cmd/repo_list.go
index 40dec6d4..9c4b0d47 100644
--- a/cmd/repo_list.go
+++ b/cmd/repo_list.go
@@ -24,7 +24,7 @@ func aptlyRepoList(cmd *commander.Command, args []string) error {
 	return aptlyRepoListTxt(cmd, args)
 }
 
-func aptlyRepoListTxt(cmd *commander.Command, args []string) error {
+func aptlyRepoListTxt(cmd *commander.Command, _ []string) error {
 	var err error
 
 	raw := cmd.Flag.Lookup("raw").Value.Get().(bool)
@@ -71,7 +71,7 @@ func aptlyRepoListTxt(cmd *commander.Command, args []string) error {
 	return err
 }
 
-func aptlyRepoListJSON(cmd *commander.Command, args []string) error {
+func aptlyRepoListJSON(_ *commander.Command, _ []string) error {
 	var err error
 
 	repos := make([]*deb.LocalRepo, context.NewCollectionFactory().LocalRepoCollection().Len())
diff --git a/cmd/repo_show.go b/cmd/repo_show.go
index 6a0be42d..a61a5f1f 100644
--- a/cmd/repo_show.go
+++ b/cmd/repo_show.go
@@ -25,7 +25,7 @@ func aptlyRepoShow(cmd *commander.Command, args []string) error {
 	return aptlyRepoShowTxt(cmd, args)
 }
 
-func aptlyRepoShowTxt(cmd *commander.Command, args []string) error {
+func aptlyRepoShowTxt(_ *commander.Command, args []string) error {
 	var err error
 
 	name := args[0]
@@ -58,7 +58,7 @@ func aptlyRepoShowTxt(cmd *commander.Command, args []string) error {
 	return err
 }
 
-func aptlyRepoShowJSON(cmd *commander.Command, args []string) error {
+func aptlyRepoShowJSON(_ *commander.Command, args []string) error {
 	var err error
 
 	name := args[0]
diff --git a/cmd/snapshot_list.go b/cmd/snapshot_list.go
index b7836630..7435b187 100644
--- a/cmd/snapshot_list.go
+++ b/cmd/snapshot_list.go
@@ -23,7 +23,7 @@ func aptlySnapshotList(cmd *commander.Command, args []string) error {
 	return aptlySnapshotListTxt(cmd, args)
 }
 
-func aptlySnapshotListTxt(cmd *commander.Command, args []string) error {
+func aptlySnapshotListTxt(cmd *commander.Command, _ []string) error {
 	var err error
 
 	raw := cmd.Flag.Lookup("raw").Value.Get().(bool)
@@ -59,7 +59,7 @@ func aptlySnapshotListTxt(cmd *commander.Command, args []string) error {
 	return err
 }
 
-func aptlySnapshotListJSON(cmd *commander.Command, args []string) error {
+func aptlySnapshotListJSON(cmd *commander.Command, _ []string) error {
 	var err error
 
 	sortMethodString := cmd.Flag.Lookup("sort").Value.Get().(string)
diff --git a/cmd/snapshot_show.go b/cmd/snapshot_show.go
index 98f15a9f..e03a49e5 100644
--- a/cmd/snapshot_show.go
+++ b/cmd/snapshot_show.go
@@ -25,7 +25,7 @@ func aptlySnapshotShow(cmd *commander.Command, args []string) error {
 	return aptlySnapshotShowTxt(cmd, args)
 }
 
-func aptlySnapshotShowTxt(cmd *commander.Command, args []string) error {
+func aptlySnapshotShowTxt(_ *commander.Command, args []string) error {
 	var err error
 	name := args[0]
 	collectionFactory := context.NewCollectionFactory()
@@ -85,7 +85,7 @@ func aptlySnapshotShowTxt(cmd *commander.Command, args []string) error {
 	return err
 }
 
-func aptlySnapshotShowJSON(cmd *commander.Command, args []string) error {
+func aptlySnapshotShowJSON(_ *commander.Command, args []string) error {
 	var err error
 
 	name := args[0]
diff --git a/cmd/task_run.go b/cmd/task_run.go
index 8e18d94c..ff0e1dd6 100644
--- a/cmd/task_run.go
+++ b/cmd/task_run.go
@@ -62,11 +62,10 @@ func aptlyTaskRun(cmd *commander.Command, args []string) error {
 			text, _ = reader.ReadString('\n')
 			if text == "\n" {
 				break
-			} else {
-				text = strings.TrimSpace(text) + ","
-				parsedArgs, _ := shellwords.Parse(text)
-				cmdArgs = append(cmdArgs, parsedArgs...)
 			}
+			text = strings.TrimSpace(text) + ","
+			parsedArgs, _ := shellwords.Parse(text)
+			cmdArgs = append(cmdArgs, parsedArgs...)
 		}
 
 		if len(cmdArgs) == 0 {
diff --git a/console/progress.go b/console/progress.go
index 6f3ba53b..16191857 100644
--- a/console/progress.go
+++ b/console/progress.go
@@ -74,7 +74,7 @@ func (p *Progress) Flush() {
 }
 
 // InitBar starts progressbar for count bytes or count items
-func (p *Progress) InitBar(count int64, isBytes bool, barType aptly.BarType) {
+func (p *Progress) InitBar(count int64, isBytes bool, _ aptly.BarType) {
 	if p.bar != nil {
 		panic("bar already initialized")
 	}
diff --git a/context/context.go b/context/context.go
index a4fef877..5c4e9d5f 100644
--- a/context/context.go
+++ b/context/context.go
@@ -457,7 +457,7 @@ func (context *AptlyContext) pgpProvider() string {
 	return provider
 }
 
-func (context *AptlyContext) getGPGFinder(provider string) pgp.GPGFinder {
+func (context *AptlyContext) getGPGFinder() pgp.GPGFinder {
 	switch context.pgpProvider() {
 	case "gpg1":
 		return pgp.GPG1Finder()
@@ -480,7 +480,7 @@ func (context *AptlyContext) GetSigner() pgp.Signer {
 		return &pgp.GoSigner{}
 	}
 
-	return pgp.NewGpgSigner(context.getGPGFinder(provider))
+	return pgp.NewGpgSigner(context.getGPGFinder())
 }
 
 // GetVerifier returns Verifier with respect to provider
@@ -493,7 +493,7 @@ func (context *AptlyContext) GetVerifier() pgp.Verifier {
 		return &pgp.GoVerifier{}
 	}
 
-	return pgp.NewGpgVerifier(context.getGPGFinder(provider))
+	return pgp.NewGpgVerifier(context.getGPGFinder())
 }
 
 // UpdateFlags sets internal copy of flags in the context
diff --git a/deb/changes.go b/deb/changes.go
index 6637034e..22c1fd86 100644
--- a/deb/changes.go
+++ b/deb/changes.go
@@ -220,12 +220,12 @@ func (c *Changes) GetField(field string) string {
 }
 
 // MatchesDependency implements PackageLike interface
-func (c *Changes) MatchesDependency(d Dependency) bool {
+func (c *Changes) MatchesDependency(_ Dependency) bool {
 	return false
 }
 
 // MatchesArchitecture implements PackageLike interface
-func (c *Changes) MatchesArchitecture(arch string) bool {
+func (c *Changes) MatchesArchitecture(_ string) bool {
 	return false
 }
 
diff --git a/deb/package_collection.go b/deb/package_collection.go
index 2da7fe67..c7e6a300 100644
--- a/deb/package_collection.go
+++ b/deb/package_collection.go
@@ -317,7 +317,7 @@ func (collection *PackageCollection) Scan(q PackageQuery) (result *PackageList)
 }
 
 // Search is not implemented
-func (collection *PackageCollection) Search(dep Dependency, allMatches bool) (searchResults []*Package) {
+func (collection *PackageCollection) Search(_ Dependency, _ bool) (searchResults []*Package) {
 	panic("Not implemented")
 }
 
diff --git a/deb/query.go b/deb/query.go
index 19a1cdc9..1de9e95b 100644
--- a/deb/query.go
+++ b/deb/query.go
@@ -138,7 +138,7 @@ func (q *NotQuery) Matches(pkg PackageLike) bool {
 }
 
 // Fast is false
-func (q *NotQuery) Fast(list PackageCatalog) bool {
+func (q *NotQuery) Fast(_ PackageCatalog) bool {
 	return false
 }
 
@@ -197,7 +197,7 @@ func (q *FieldQuery) Query(list PackageCatalog) (result *PackageList) {
 }
 
 // Fast depends on the query
-func (q *FieldQuery) Fast(list PackageCatalog) bool {
+func (q *FieldQuery) Fast(_ PackageCatalog) bool {
 	return false
 }
 
@@ -265,7 +265,7 @@ func (q *PkgQuery) Matches(pkg PackageLike) bool {
 }
 
 // Fast is always true for package query
-func (q *PkgQuery) Fast(list PackageCatalog) bool {
+func (q *PkgQuery) Fast(_ PackageCatalog) bool {
 	return true
 }
 
@@ -280,12 +280,12 @@ func (q *PkgQuery) String() string {
 }
 
 // Matches on specific properties
-func (q *MatchAllQuery) Matches(pkg PackageLike) bool {
+func (q *MatchAllQuery) Matches(_ PackageLike) bool {
 	return true
 }
 
 // Fast is always true for match all query
-func (q *MatchAllQuery) Fast(list PackageCatalog) bool {
+func (q *MatchAllQuery) Fast(_ PackageCatalog) bool {
 	return true
 }
 
diff --git a/deb/remote.go b/deb/remote.go
index 6d30e999..72deb7af 100644
--- a/deb/remote.go
+++ b/deb/remote.go
@@ -428,7 +428,7 @@ ok:
 }
 
 // DownloadPackageIndexes downloads & parses package index files
-func (repo *RemoteRepo) DownloadPackageIndexes(progress aptly.Progress, d aptly.Downloader, verifier pgp.Verifier, collectionFactory *CollectionFactory,
+func (repo *RemoteRepo) DownloadPackageIndexes(progress aptly.Progress, d aptly.Downloader, verifier pgp.Verifier, _ *CollectionFactory,
 	ignoreMismatch bool) error {
 	if repo.packageList != nil {
 		panic("packageList != nil")
diff --git a/http/download.go b/http/download.go
index a6e65896..7f8e0315 100644
--- a/http/download.go
+++ b/http/download.go
@@ -68,7 +68,7 @@ func NewDownloader(downLimit int64, maxTries int, progress aptly.Progress) aptly
 	return downloader
 }
 
-func (downloader *downloaderImpl) checkRedirect(req *http.Request, via []*http.Request) error {
+func (downloader *downloaderImpl) checkRedirect(req *http.Request, _ []*http.Request) error {
 	if downloader.progress != nil {
 		downloader.progress.Printf("Following redirect to %s...\n", req.URL)
 	}
diff --git a/http/fake.go b/http/fake.go
index 2cbb72d6..40a1093d 100644
--- a/http/fake.go
+++ b/http/fake.go
@@ -61,7 +61,7 @@ func (f *FakeDownloader) Empty() bool {
 }
 
 // GetLength returns content length of given url
-func (f *FakeDownloader) GetLength(ctx context.Context, url string) (int64, error) {
+func (f *FakeDownloader) GetLength(_ context.Context, url string) (int64, error) {
 	expectation, err := f.getExpectedRequest(url)
 	if err != nil {
 		return -1, err
@@ -89,7 +89,7 @@ func (f *FakeDownloader) getExpectedRequest(url string) (*expectedRequest, error
 }
 
 // DownloadWithChecksum performs fake download by matching against first expectation in the queue or any expectation, with cheksum verification
-func (f *FakeDownloader) DownloadWithChecksum(ctx context.Context, url string, filename string, expected *utils.ChecksumInfo, ignoreMismatch bool) error {
+func (f *FakeDownloader) DownloadWithChecksum(_ context.Context, url string, filename string, expected *utils.ChecksumInfo, ignoreMismatch bool) error {
 	expectation, err := f.getExpectedRequest(url)
 	if err != nil {
 		return err
diff --git a/http/grab.go b/http/grab.go
index 2d07521c..ecd0f368 100644
--- a/http/grab.go
+++ b/http/grab.go
@@ -114,7 +114,7 @@ func (d *GrabDownloader) maybeSetupChecksum(req *grab.Request, expected *utils.C
 	return nil
 }
 
-func (d *GrabDownloader) download(ctx context.Context, url string, destination string, expected *utils.ChecksumInfo, ignoreMismatch bool) error {
+func (d *GrabDownloader) download(_ context.Context, url string, destination string, expected *utils.ChecksumInfo, ignoreMismatch bool) error {
 	// TODO clean up dest dir on permanent failure
 	d.log("Download %s -> %s\n", url, destination)
 
@@ -155,7 +155,7 @@ func (d *GrabDownloader) GetProgress() aptly.Progress {
 	return d.progress
 }
 
-func (d *GrabDownloader) GetLength(ctx context.Context, url string) (int64, error) {
+func (d *GrabDownloader) GetLength(_ context.Context, url string) (int64, error) {
 	resp, err := http.Head(url)
 	if err != nil {
 		return -1, err
diff --git a/main.go b/main.go
index 2503571a..337575a4 100644
--- a/main.go
+++ b/main.go
@@ -1,9 +1,7 @@
 package main
 
 import (
-	"math/rand"
 	"os"
-	"time"
 
 	"github.com/aptly-dev/aptly/aptly"
 	"github.com/aptly-dev/aptly/cmd"
@@ -22,7 +20,5 @@ func main() {
 
 	aptly.Version = Version
 
-	rand.Seed(time.Now().UnixNano())
-
 	os.Exit(cmd.Run(cmd.RootCommand(), os.Args[1:], true))
 }
diff --git a/main_test.go b/main_test.go
index 35208ed3..81ef138d 100644
--- a/main_test.go
+++ b/main_test.go
@@ -6,7 +6,6 @@ package main
 import (
 	"flag"
 	"fmt"
-	"math/rand"
 	"os"
 	"strings"
 	"testing"
@@ -53,8 +52,6 @@ func TestRunMain(t *testing.T) {
 
 	aptly.Version = Version
 
-	rand.Seed(time.Now().UnixNano())
-
 	args := filterOutTestArgs(os.Args[1:])
 	root := cmd.RootCommand()
 	root.UsageLine = "aptly"
diff --git a/s3/public.go b/s3/public.go
index 0b606128..67edca09 100644
--- a/s3/public.go
+++ b/s3/public.go
@@ -131,7 +131,7 @@ func (storage *PublishedStorage) String() string {
 }
 
 // MkDir creates directory recursively under public path
-func (storage *PublishedStorage) MkDir(path string) error {
+func (storage *PublishedStorage) MkDir(_ string) error {
 	// no op for S3
 	return nil
 }
@@ -232,7 +232,7 @@ func (storage *PublishedStorage) Remove(path string) error {
 }
 
 // RemoveDirs removes directory structure under public path
-func (storage *PublishedStorage) RemoveDirs(path string, progress aptly.Progress) error {
+func (storage *PublishedStorage) RemoveDirs(path string, _ aptly.Progress) error {
 	const page = 1000
 
 	filelist, _, err := storage.internalFilelist(path, false)
diff --git a/swift/public.go b/swift/public.go
index 0ca4796c..4f8c7b8a 100644
--- a/swift/public.go
+++ b/swift/public.go
@@ -113,7 +113,7 @@ func (storage *PublishedStorage) String() string {
 }
 
 // MkDir creates directory recursively under public path
-func (storage *PublishedStorage) MkDir(path string) error {
+func (storage *PublishedStorage) MkDir(_ string) error {
 	// no op for Swift
 	return nil
 }
@@ -155,7 +155,7 @@ func (storage *PublishedStorage) Remove(path string) error {
 }
 
 // RemoveDirs removes directory structure under public path
-func (storage *PublishedStorage) RemoveDirs(path string, progress aptly.Progress) error {
+func (storage *PublishedStorage) RemoveDirs(path string, _ aptly.Progress) error {
 	path = filepath.Join(storage.prefix, path)
 	opts := swift.ObjectsOpts{
 		Prefix: path,
diff --git a/swift/public_test.go b/swift/public_test.go
index 31b633e8..ed8ff608 100644
--- a/swift/public_test.go
+++ b/swift/public_test.go
@@ -6,7 +6,6 @@ import (
 	"math/rand"
 	"os"
 	"path/filepath"
-	"time"
 
 	. "gopkg.in/check.v1"
 
@@ -27,8 +26,6 @@ var _ = Suite(&PublishedStorageSuite{})
 func (s *PublishedStorageSuite) SetUpTest(c *C) {
 	var err error
 
-	rand.Seed(int64(time.Now().Nanosecond()))
-
 	s.TestAddress = fmt.Sprintf("localhost:%d", rand.Intn(10000)+20000)
 	s.AuthURL = "http://" + s.TestAddress + "/v1.0"
 
diff --git a/task/output.go b/task/output.go
index cd20ff73..f4c5e8f7 100644
--- a/task/output.go
+++ b/task/output.go
@@ -63,12 +63,12 @@ func (t *Output) Flush() {
 }
 
 // InitBar is needed for progress compatibility
-func (t *Output) InitBar(count int64, isBytes bool, barType aptly.BarType) {
+func (t *Output) InitBar(_ int64, _ bool, _ aptly.BarType) {
 	// Not implemented
 }
 
 // InitBar publish output specific
-func (t *PublishOutput) InitBar(count int64, isBytes bool, barType aptly.BarType) {
+func (t *PublishOutput) InitBar(count int64, _ bool, barType aptly.BarType) {
 	t.barType = &barType
 	if barType == aptly.BarPublishGeneratePackageFiles {
 		t.TotalNumberOfPackages = count
@@ -88,12 +88,12 @@ func (t *PublishOutput) ShutdownBar() {
 }
 
 // AddBar is needed for progress compatibility
-func (t *Output) AddBar(count int) {
+func (t *Output) AddBar(_ int) {
 	// Not implemented
 }
 
 // AddBar publish output specific
-func (t *PublishOutput) AddBar(count int) {
+func (t *PublishOutput) AddBar(_ int) {
 	if t.barType != nil && *t.barType == aptly.BarPublishGeneratePackageFiles {
 		t.RemainingNumberOfPackages--
 		t.Store(t)
@@ -101,7 +101,7 @@ func (t *PublishOutput) AddBar(count int) {
 }
 
 // SetBar sets current position for progress bar
-func (t *Output) SetBar(count int) {
+func (t *Output) SetBar(_ int) {
 	// Not implemented
 }
 
@@ -123,5 +123,5 @@ func (t *Output) ColoredPrintf(msg string, a ...interface{}) {
 
 // PrintfStdErr does printf but in safe manner to output
 func (t *Output) PrintfStdErr(msg string, a ...interface{}) {
-	t.WriteString(msg)
+	t.WriteString(fmt.Sprintf(msg, a...))
 }
diff --git a/utils/logging.go b/utils/logging.go
index d09079fa..592e8f30 100644
--- a/utils/logging.go
+++ b/utils/logging.go
@@ -58,7 +58,7 @@ func GetLogLevelOrDebug(levelStr string) zerolog.Level {
 
 type timestampHook struct{}
 
-func (h *timestampHook) Run(e *zerolog.Event, l zerolog.Level, msg string) {
+func (h *timestampHook) Run(e *zerolog.Event, _ zerolog.Level, _ string) {
 	t := time.Now()
 	ts := t.Format(time.RFC3339)
 	e.Str("time", ts)