diff --git a/20160418/dd-20160418.log b/20160418/dd-20160418.log
new file mode 100644
index 0000000000000000000000000000000000000000..ed85a7ae97fa1bd22197dab5a9ab05dec1cb33ad
--- /dev/null
+++ b/20160418/dd-20160418.log
@@ -0,0 +1,25 @@
+cassini/home/peter/bo/2016ss/bs/20160418> dd if=/dev/urandom bs=1 count=320 | hexdump -C
+00000000  37 58 09 57 94 da 03 1d  d4 d8 51 33 7e c0 8e f8  |7X.W......Q3~...|
+00000010  16 99 cb 6d fb 05 5c 9d  c9 25 f0 37 45 b3 e2 f6  |...m..\..%.7E...|
+00000020  ca bd 27 c8 26 5c 10 5c  e9 a1 ad d2 93 4c 31 2f  |..'.&\.\.....L1/|
+00000030  9d 23 65 55 cd bf 90 a5  42 3e 3d cd eb 77 3f 08  |.#eU....B>=..w?.|
+00000040  56 7b 38 61 48 62 3a c4  a2 e0 01 f2 ff 8d 77 68  |V{8aHb:.......wh|
+00000050  74 14 1e 54 a2 6f be 30  85 39 1c ec 22 8a b1 be  |t..T.o.0.9.."...|
+00000060  8a 71 0c 7b ec d1 6d ac  de b5 4e e0 80 78 a5 c5  |.q.{..m...N..x..|
+00000070  48 20 cd e8 26 08 ef ad  57 8a 90 77 39 70 87 4a  |H ..&...W..w9p.J|
+00000080  a7 62 26 72 ca 64 c5 1b  32 57 23 aa e9 8d 27 0a  |.b&r.d..2W#...'.|
+00000090  20 aa dd 5d 12 5a 94 22  8a 76 18 73 61 9c c5 10  | ..].Z.".v.sa...|
+000000a0  bc 72 18 c2 1e b3 68 64  95 8b 37 40 2f 9f 1e 49  |.r....hd..7@/..I|
+000000b0  1a 88 c7 58 35 07 55 6c  23 ea 66 ce 6a 87 a9 97  |...X5.Ul#.f.j...|
+000000c0  61 d6 43 70 97 5d c3 7c  61 ef 03 04 b3 18 49 22  |a.Cp.].|a.....I"|
+000000d0  e3 a2 63 0f e1 ca 16 a3  c4 4b fe 2e c9 3b 96 24  |..c......K...;.$|
+000000e0  04 dc b5 90 82 c7 d6 6c  4f c6 50 19 f4 6a 88 29  |.......lO.P..j.)|
+000000f0  3f ec 57 c9 69 11 a8 ef  56 4e 50 30 d8 c5 83 b9  |?.W.i...VNP0....|
+00000100  ab 5c 0b 50 27 ba 4a 19  45 dc 82 01 fd cb a3 b9  |.\.P'.J.E.......|
+00000110  c1 22 d5 62 70 2e 59 57  15 b8 e2 0b b7 66 a4 80  |.".bp.YW.....f..|
+00000120  f6 cc 89 b6 bb 2f 5a cb  93 42 61 30 84 e3 a5 1e  |...../Z..Ba0....|
+00000130  9d 4d 7c 3d a5 c8 94 91  51 46 f6 c3 33 15 20 c6  |.M|=....QF..3. .|
+320+0 Datensätze ein
+320+0 Datensätze aus
+00000140
+320 Bytes (320 B) kopiert, 0,00166432 s, 192 kB/s
diff --git a/20160418/del b/20160418/del
new file mode 100755
index 0000000000000000000000000000000000000000..9f04eaea11e7c752594ce13247173afe8cc49754
--- /dev/null
+++ b/20160418/del
@@ -0,0 +1,5 @@
+#!/bin/bash
+ls "$@"
+echo -n "Press ENTER to delete, ^C to abort."
+read junk
+rm "$@"
diff --git a/20160418/del-20160418.log b/20160418/del-20160418.log
new file mode 100644
index 0000000000000000000000000000000000000000..aa623d5f1ca1167e8989b2fae025975d5546cda5
--- /dev/null
+++ b/20160418/del-20160418.log
@@ -0,0 +1,20 @@
+cassini/home/peter/bo/2016ss/bs/20160418> touch 1.c 2.c 3.c
+cassini/home/peter/bo/2016ss/bs/20160418> del *.c
+1.c  2.c  3.c
+Press ENTER to delete, ^C to abort.
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l
+insgesamt 4
+-rwxr-xr-x 1 peter peter 84 Apr 18 11:39 del
+cassini/home/peter/bo/2016ss/bs/20160418> cat del
+#!/bin/bash
+ls "$@"
+echo -n "Press ENTER to delete, ^C to abort."
+read junk
+rm "$@"
+cassini/home/peter/bo/2016ss/bs/20160418> alias
+alias S='ls -lrS'
+alias dir='ls -l'
+alias ls='ls --color=tty'
+alias rm='rm -i'
+alias t='ls -lrt'
+alias vi='vim -X -c '\''set sw=2'\'' -c '\''set expandtab'\'' -c '\''set ai'\'' -c '\''set nowrap'\'''
diff --git a/20160418/grep-20160418-1.log b/20160418/grep-20160418-1.log
new file mode 100644
index 0000000000000000000000000000000000000000..fca4370548d75478805434dc4248e57b9430cacb
--- /dev/null
+++ b/20160418/grep-20160418-1.log
@@ -0,0 +1,12 @@
+cassini/home/peter/bo/2016ss/bs/20160418> grep Hallo
+Hallo?
+Hallo?
+Da ist jemand.
+Sag mal was.
+Hallo????
+Hallo????
+Also doch.
+Hmm...
+Sag doch noch mal "Hallo".
+Sag doch noch mal "Hallo".
+Hör auf, mich nachzuäffen!
diff --git a/20160418/grep-20160418-2.log b/20160418/grep-20160418-2.log
new file mode 100644
index 0000000000000000000000000000000000000000..88532d9559f5ab98bfd32ad97af56eff984fbbee
--- /dev/null
+++ b/20160418/grep-20160418-2.log
@@ -0,0 +1,12 @@
+cassini/home/peter/bo/2016ss/bs/20160418> grep "ab\?c"
+ac
+ac
+abc
+abc
+axc
+cassini/home/peter/bo/2016ss/bs/20160418> grep "a\(bcd\)\?e"
+aerger
+aerger
+abcde
+abcde
+abde
diff --git a/20160418/grep-20160418-3.log b/20160418/grep-20160418-3.log
new file mode 100644
index 0000000000000000000000000000000000000000..b8b1f0ac931158ae0ee8dcba40ec23c0d0fe3e14
--- /dev/null
+++ b/20160418/grep-20160418-3.log
@@ -0,0 +1,19 @@
+cassini/home/peter/bo/2016ss/bs/20160418> grep "ab.cd"
+abcd
+abxcd
+abxcd
+cassini/home/peter/bo/2016ss/bs/20160418> grep "ab.*cd"
+abcd
+abcd
+abPIUPOUIPUIÖJKLJKJcd
+abPIUPOUIPUIÖJKLJKJcd
+ab?(=(/%/&%=/=)(/=)/?=(cd
+ab?(=(/%/&%=/=)(/=)/?=(cd
+cassini/home/peter/bo/2016ss/bs/20160418> grep "ab*cd"
+abcd
+abcd
+acd
+acd
+abbbbbbbbbbbbcd
+abbbbbbbbbbbbcd
+abccccccccccccd
diff --git a/20160418/mount-20160418-1.log b/20160418/mount-20160418-1.log
new file mode 100644
index 0000000000000000000000000000000000000000..a898564db9167f996160637692bcf64f77d23151
--- /dev/null
+++ b/20160418/mount-20160418-1.log
@@ -0,0 +1,24 @@
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l /media/
+insgesamt 12
+drwxr-xr-x 2 root root 4096 Dez 22  2012 cdrom
+lrwxrwxrwx 1 root root    4 Dez 22  2012 usb -> usb0
+drwxr-xr-x 2 root root 4096 Dez 22  2012 usb0
+drwxr-xr-x 2 root root 4096 Apr 14 14:16 usb1
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l /media/usb1/
+insgesamt 0
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l /media/usb1/
+insgesamt 0
+cassini/home/peter/bo/2016ss/bs/20160418> mount /media/usb1/
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l /media/usb1/
+insgesamt 32
+-rwxr-xr-x 1 peter peter  164 Apr 14 13:54 cat-1.log
+-rwxr-xr-x 1 peter peter  304 Apr 14 13:56 cat-2.log
+-rwxr-xr-x 1 peter peter  176 Apr 14 13:57 echo-1.log
+-rwxr-xr-x 1 peter peter  157 Apr 14 13:51 grep-1.log
+-rwxr-xr-x 1 peter peter  298 Apr 14 14:03 grep-2.log
+-rwxr-xr-x 1 peter peter  438 Apr 14 14:04 grep-3.log
+drwxr-xr-x 2 peter peter 4096 Apr 14 16:36 System Volume Information
+-rwxr-xr-x 1 peter peter   45 Apr 14 13:57 test.txt
+cassini/home/peter/bo/2016ss/bs/20160418> umount /media/usb1/
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l /media/usb1/
+insgesamt 0
diff --git a/20160418/mount-20160418-2.log b/20160418/mount-20160418-2.log
new file mode 100644
index 0000000000000000000000000000000000000000..f4872374ca40fd152c72d44ee32d9d0460d2d643
--- /dev/null
+++ b/20160418/mount-20160418-2.log
@@ -0,0 +1,16 @@
+cassini/home/peter/bo/2016ss/bs/20160418> mount /media/usb1/
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l /media/usb1/
+insgesamt 0
+cassini/home/peter/bo/2016ss/bs/20160418> cp -p * /media/usb1/
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l /media/usb1/
+insgesamt 28
+-rwxr-xr-x 1 peter peter 1772 Apr 18 12:12 dd-20160418.log
+-rwxr-xr-x 1 peter peter   84 Apr 18 11:39 del
+-rwxr-xr-x 1 peter peter  647 Apr 18 11:45 del-20160418.log
+-rwxr-xr-x 1 peter peter  216 Apr 18 11:56 grep-20160418-1.log
+-rwxr-xr-x 1 peter peter  165 Apr 18 12:03 grep-20160418-2.log
+-rwxr-xr-x 1 peter peter  357 Apr 18 12:05 grep-20160418-3.log
+-rwxr-xr-x 1 peter peter 1120 Apr 18 12:16 mount-20160418-1.log
+cassini/home/peter/bo/2016ss/bs/20160418> umount /media/usb1/
+cassini/home/peter/bo/2016ss/bs/20160418> ls -l /media/usb1/
+insgesamt 0