diff --git a/echo.nim b/echo.nim
index ae894c6..093c39e 100644
--- a/echo.nim
+++ b/echo.nim
@@ -2,8 +2,8 @@ import cligen, sequtils
 import common
 
 proc main(strings:seq[string], newline=true) =
-    if newline: writeLine(stdout, strings.foldl(a & b))
-    else: write(stdout, strings.foldl(a & b))
+    if newline: writeLine(stdout, strings.foldl(a & " " & b))
+    else: write(stdout, strings.foldl(a & " " & b))
     flushFile(stdout)
 
 dispatch(main, version=("version", nimbaseVersion))
diff --git a/head.nim b/head.nim
index 24a72dc..a4b6c82 100644
--- a/head.nim
+++ b/head.nim
@@ -5,16 +5,17 @@ proc main(files:seq[string], lines=10, bytes=0) =
 #    if files.len == 0:
 #        files.add "-"
     for file in files:
-        var s = newFileStream(file, fmRead)
+        var f = if file == "-": stdin
+                else: open(file, fmRead)
         if bytes > 0:
             var currentByte = 0
-            while not s.atEnd and currentByte < bytes:
-                write(stdout, s.readChar)
+            while not f.endOfFile and currentByte < bytes:
+                write(stdout, f.readChar)
                 inc currentByte
         elif lines > 0:
             var currentLine = 0
-            while not s.atEnd and currentLine < lines:
-                echo s.readLine
+            while not f.endOfFile and currentLine < lines:
+                writeLine(stdout, f.readLine)
                 inc currentLine
 
 dispatch(main, version=("version", nimbaseVersion))
diff --git a/nimbase.nimble b/nimbase.nimble
index 929969b..1b02f79 100644
--- a/nimbase.nimble
+++ b/nimbase.nimble
@@ -8,6 +8,6 @@ requires      "nim >= 0.19.0"
 requires      "cligen >= 0.9.19"
 requires      "stint >= 0.0.1"
 
-bin           = @["add", "cat", "cp", "div", "echo", "factor", "false", "head", "mkdir", "mul", "pwd", "rm", "seq", "sleep", "sub", "tee", "touch", "true", "yes"]
+bin           = @["add", "cat", "cp", "div", "echo", "factor", "false", "head", "mkdir", "mul", "pwd", "rm", "seq", "shuf", "sleep", "sub", "tee", "touch", "true", "yes"]
 
 binDir        = "bin"
diff --git a/rev.nim b/rev.nim
new file mode 100644
index 0000000..e69de29
diff --git a/rm.nim b/rm.nim
index 671629d..6022cf5 100644
--- a/rm.nim
+++ b/rm.nim
@@ -12,10 +12,10 @@ proc main(files:seq[string], force=false, recursive=false) =
             if recursive:
                 removeDir(file)
             else:
-                echo errorMsg & file & "': Is a directory"
+                err errorMsg & file & "': Is a directory"
                 programResult = 1
         else:
-            echo errorMsg & file & "': No such file or directory"
+            err errorMsg & file & "': No such file or directory"
             programResult = 1
 
 dispatch(main, version=("version", nimbaseVersion))
diff --git a/shuf.nim b/shuf.nim
new file mode 100644
index 0000000..9450259
--- /dev/null
+++ b/shuf.nim
@@ -0,0 +1,8 @@
+import cligen
+import common
+
+proc main(files:seq[string]) =
+    for file in files:
+        echo ""
+
+dispatch(main, version=("version", nimbaseVersion))
diff --git a/tac.nim b/tac.nim
new file mode 100644
index 0000000..e69de29