/media/sda-magnetic/david/Dokumente-15/fernuni-hagen/cs-i-ii/old-cs-2-01/informatik2/lex-yacc-bash-etc/all00013.txt

# client 
# sender 
# recipient
# relay

smtpd_client_restrictions=
smtpd_sender_restrictions=
smptd_recipient_restrictions=
smtpd_relay_restrictions=
smtpd_data_restrictions=
smtpd_end_of_data_restrictions=
smtpd_etrn_restrictions=
smtpd_helo_restrictions=

mynetworks=
myhostname=
smtpd_helo_required=yes

# permit_mynetworks
# check_policy_service

# unknown
# reject_unknown_client
# reject_unknown_client_hostname
# reject_unknown_reverse_client_hostname
# reject_unknown_helo_hostname
# reject_unknown_hostname
# reject_unknown_sender_domain 
# reject_unknown_recipient_domain 

# hostname 
# reject_unknown_client_hostname
# reject_unknown_reverse_client_hostname
# reject_unknown_helo_hostname
# reject_unknown_hostname
# reject_invalid_hostname 
# reject_non_fqdn_hostname

# non_fqdn 
# reject_non_fqdn_hostname
# reject_non_fqdn_sender 
# reject_non_fqdn_recipient 

# unauth 
# reject_unauth_pipelining
# reject_unauth_destination 

# sender 
# reject_non_fqdn_sender
# reject_unknown_sender_domain

# recipient 
# reject_non_fqdn_recipient
# reject_unknown_recipient_domain

a CAPABLITY
a LOGIN "user" "password"
a LIST "" *
a SELECT INBOX
a FETCH 1 RFC822
a STORE 1 +FLAGS (\Seen \Deleted)
a CLOSE
a EXPUNGE
a SEARCH
a LOGOUT

HELO/EHLO
MAIL
DATA 
RST
VRFY
EXPN
NOOP
QUIT

Return-Path:
Recevied:
From:
To:
Subject:
Date:
Message-ID:
User-Agent:
MIME-Version:
Content-Transfer-Encoding:
Content-Type:
X-Assp-..:
X-Priority:
Delivered-To:
Reply-To:

%{
#include <stdio.h>
#include <ctype.h>
%}
%token NUMBER
%%
lines           :   lines expr '\n'     {printf("%d\n", $2);}
                |   lines '\n'
                ;
expr            :   expr '+' term       {$$=$1+$3;}
                |   expr '-' term       {$$=$1-$3;}
                |   term
                ;
term            :   term '*' factor     {$$=$1*$3;}
                |   term '/' factor     {$$=$1/$3;}
                |   factor
                ;
factor          :   '(' expr ')'        {$$=$2;}
                |   NUMBER
                ;
                
statement       ->  assignment | cond | loop
assigment       ->  id := expr
cond            ->  if boolexpr then statement fi |
                    if boolexpr then statement else statement fi
loop            ->  while boolexpr do statement od
expr            ->  boolexpr | numexpr
boolexpr        ->  numexpr cop numexpr
numexpr         ->  numexpr + term | term
term            ->  term * factor | factor
factor          ->  id | const | (numexpr)

#!/bin/bash

# ./skript.sh
# bash skript.sh
# /bin/bash ./skript.sh

# Dies ist ein Kommentar

echo "Dies ist eine Ausgabe"

var1=Hallo
var2=Welt

echo $var1
echo $var2

if [ $var1 == $var2 ]
then 
    echo $var1
else
    echo $var2
fi

while [ $var1 == $var2 ]
do 
    echo $var1
done 

for var3 in "a " "b " "c "
do
    echo $var3
done

typeset -i i=15
i=$(( 4+5 ))
i=$(( (4+2)*7 ))

while [ $i -le 50 ]
do 
    echo $i
    i=$(( $i+1 ))
done

useradd
userdel
usermod
groupadd
groupdel
groupmod
newgrp
id
passwd
chsh
chfn

man
info
locate
grep
find

mv
mmv
cp
cd
mkdir
touch
rm
rmdir
unlink
pwd
basename
md5sum
blkid
lsblk
lsof

diff
comm
cut
cat

exit
echo

mount/umount

CPU

IF  -   Instruction Fetch - Befehlsholestufe
ID  -   Instruction Decode/Register Fetch - Befehlsdekodierstufe
EX  -   Execute - Ausführungsstufe - ALU
MEM -   Memory - Speicherzugriff
WB  -   Write Back - Rückschreibephase

Pipeline
Pipeline-Stufe = Pipeline-Segment
Pipeline-Maschinentakt
Pipeline-Hemmnis/Pipeline-Hazard/Pipeline-Konflikt
Durchsatz einer Pipeline 

BTAC - Branch Target Adress Cache - Sprungzieladresspuffer
BTB - Branch Target Buffer

Datenkonflikte
Steuerflusskonflikte
Struktur und Ressoucenkonflikte 

Echte Datenabhänigkeit: Lese nach Schreibe Konflikt RAW
Gegenabhänigkeit: Antidependence: WAR - Schreibe nach Lese 
Ausgabeabhängigkeit: Output-Dependence: WAW : Schreibe nach Schreibe

Sprungvorhersage:
Statisch
Dynamisch 

Statisch:
- Predict Always Taken 
- Predict Always Not Taken
- Predict Backward Taken, Forward not Taken

Dynamische
1. Ein-Bit-Prädiktor
- T - Taken - genommen 
- NT - Not Taken - nicht genommen 

2. Zwei-Bit-Prädiktor
- Predict Strongly Taken (11)
- Predict Weakly Taken (10)
- Predict Weakly Not Taken (01)
- Predict Strongly Not Taken (00)