03 tk2123 - pemrograman shell-2

TK2123 Pemrograman Shell
Semester Genap 2015/2016
TASS, Bandung 2016
www.tass.telkomuniversity.a
c.id
Hanya dipergunakan untuk kepentingan pengajaran di lingkungan Telkom Applied Science
School (TASS)
Dasar Pemrograman Shell

Kondisi / Pencabangan
Perulangan
Berhenti / keluar blok kendali
Struktur Kendali

Alternatif proses yang akan
dieksekusi berdasar nilai
kebenaran kondisi.
Operai logika : AND, OR, NOT
Kondisi

if [ expression 1 ]
then
Statement(s) to be executed if expression 1 is true
elif [ expression 2 ]
then
elif [ expression 3 ]
then
else
Statement(s) to be executed if no expression is
true
fi
Sintaks

#!/bin/bash
if [ "$#" -gt 0 ] then
echo "There's Beans"
fi
if [ "$1" = "cool" ] then
echo "Cool Beans"
fi
nano latihan3a.sh

#!/bin/bash
if [ "$1" = "cool" ]
then
echo "Cool Beans"
else
echo "Not Cool Beans"
fi
nano latihan3b.sh

#!/bin/bash
if [ "$1" = "cool" ] then
echo "Cool Beans"
elif [ "$1" = "neat" ] then
echo "Neat cool"
else
echo "Not Cool Beans“
fi
nano latihan3c.sh

#!/bin/bash
if [ "$1" = "cool" ]
then
echo "Cool Beans"
else
echo "Not Cool Beans"
fi
nano latihan3d.sh

#!/bin/bash
if [ -f "$1" ] then
echo "$1 is a file"
else
echo "$1 is not a file"
fi
nano latihan3e.sh

#!/bin/bash
a=10
b=20
if [ $a == $b ] then
echo "a is equal to b"
elif [ $a -gt $b ] then
echo "a is greater than b"
elif [ $a -lt $b ] then
echo "a is less than b"
else
echo "None of the condition met"
fi
nano latihan3f.sh

$ true
$ echo $?
#Hasilnya ?
$ false
$ echo $?
#Hasilnya ?
True and or False
$ if true; then echo "It's true."; fi
#Hasilnya ?
$ if false; then echo "It's false.";
fi
#Hasilnya ?

Banyak dipakai dengan perintah if untuk membuat
keputusan benar/salah.
Jika ekspresi bernilai benar, test keluar dengan status 0,
sebaliknya berstatus 1
Bentuk sintaksnya :
# Pertama
test expression
# Kedua
[ expression ]
Test

#!/bin/bash
if [ -f .bash_profile ];then
echo "You have a .bash_profile"
else
echo "You have no .bash_profile!"
fi
nano latihan3g.sh

#!/bin/bash
if test $1 -gt 0
then
echo "$1 number is
positive"
fi
nano latihan3h.sh

Merupakan perintah yang dipakai untuk
mengakhiri skrip dan menset status exitnya.
Contoh
#Keluar skrip dengan exit status 0 (success)
exit 0
#Keluar skrip dengan exit status 1 (failure)
exit 1
Exit

$ id -u
501
$ su
Password:
# id -u
0
ID super user

#!/bin/bash
if [ $(id -u) = "0" ]; then
echo "superuser"
fi
nano latihan3i.sh

#!/bin/bash
if [ $(id -u) != "0" ]; then
echo “Harus superuser untuk menjalankan skrip ini"
exit 1
fi
nano latihan3j.sh

#!/bin/bash
if [ $# -eq 0 ]
then
echo "$0 : Ketikkkan angka integer"
exit 1
fi
if test $1 -gt 0
then
echo "$1 bilangan positif"
else
echo "$1 bilangan negatif"
fi
nano latihan3k.sh

Case – 1 (multiple if dengan
variabel tunggal)
case $variable in
match_1)
commands_to_execute_for_1
;;
match_2)
;;
match_3)
;;
.
.
.
*) (Optional - any other value)
commands_to_execute_for_no_match
;;
esac

#!/bin/bash
case $( arch ) in # "arch" arsitektur
mesin
# Equivalent to 'uname -m' ...
i386 ) echo "80386-based machine";;
i486 ) echo "80486-based machine";;
i586 ) echo "Pentium-based machine";;
i686 ) echo "Pentium2+-based machine";;
* ) echo "Other type of machine";;
esac
nano latihan3l.sh

#!/bin/bash
option="${1}"
case ${option} in
-f) FILE="${2}"
echo "File name is $FILE"
;;
-d) DIR="${2}"
echo "Dir name is $DIR"
;;
*)
echo "`basename ${0}`:usage: [-f file] | [-d
directory]"
exit 1 # Command to come out of the program with
status 1
;;
esac
nano latihan3m.sh

#!/bin/bash
NOW=$(date +"%a")
case $NOW in
Mon)
echo "Full backup";;
Tue|Wed|Thu|Fri)
echo "Partial backup";;
Sat|Sun)
echo "No backup";;
*) ;;
esac
nano latihan3n.sh

#!/bin/bash
# Skrip backup mysql, webserver & file-file ke tape
opt=$1
case $opt in
sql)
echo "Running mysql backup using mysqldump tool..." ;;
sync)
echo "Running backup using rsync tool..." ;;
tar)
echo "Running tape backup using tar tool..." ;;
*)
echo "Backup shell script utility"
echo "Usage: $0 {sql|sync|tar}"
echo "sql : Run mySQL backup utility."
echo "sync : Run web server backup utility."
echo "tar : Run tape backup utility." ;;
esac
nano latihan3o.sh

#!/bin/bash
echo -n "Do you agree with this? [yes or no]: "
read yno
case $yno in
[yY] | [yY][Ee][Ss] )
echo "Agreed"
;;
[nN] | [n|N][O|o] )
echo "Not agreed, can't proceed the installation";
exit 1
;;
*) echo "Invalid input"
;;
esac
nano latihan3p.sh

#!/bin/bash
case "$1" in
'start')
echo "Starting application"
/usr/bin/startpc
;;
'stop')
echo "Stopping application"
/usr/bin/stoppc
;;
'restart')
echo "Usage: $0 [start|stop]"
;;
esac
nano latihan3q.sh

!/bin/bash
# Testing ranges of characters.
echo; echo "Hit a key, then hit return."
read Keypress
case "$Keypress" in
[[:lower:]] ) echo "Lowercase letter";;
[[:upper:]] ) echo "Uppercase letter";;
[0-9] ) echo "Digit";;
* ) echo "Punctuation, whitespace, or
other";;
esac
# range karakter [square brackets],
# range POSIX [[double square brackets]]
nano latihan3r.sh

Merupakan struktur kendali yang
memungkinkan perulangan
tertentu terhadap proses.
Yang harus diperhatikan :
Kondisi berhenti harus
tercapai  jika tidak maka akan
terjadi ENDLESS LOOP (hang)
Perulangan (LOOPING)

while [ condition ]
do
command1
command2
commandN
done
Macam perulangan - 1

for { variable name } in { list }
do
command1
command2
…
commandN
done

for (( expr1; expr2; expr3 ))
do
command1
command2
…
commandN
done

until [ condition ]
do
command1
command2
commandN
done

#!/bin/bash
c=1
while [ $c -le 5 ]
do
echo "Welcome $c times"
(( c++ ))
done
nano latihan3s.sh

#!/bin/bash
for i in 1 2 3 4 5
do
echo "Welcome $i times"
done
nano latihan3t.sh

#!/bin/bash
for (( i = 0 ; i <= 5; i+
+ ))
do
echo "Welcome $i times"
done
nano latihan3u.sh

#!/bin/bash
i=1;
for (( ; ; ))
do
sleep $i
echo "Number: $((i++))"
done
nano latihan3v.sh

#!/bin/bash
i=1
for day in Mon Tue Wed Thu
Fri
do
echo "Weekday $((i++)) :
$day"
done
nano latihan3w.sh

#!/bin/bash
i=1
for day in "Mon Tue Wed Thu
Fri"
do
echo "Weekday $((i++)) : $day"
done
nano latihan3x.sh

#!/bin/bash
i=1
weekdays="Mon Tue Wed Thu
Fri"
for day in $weekdays
do
echo "Weekday $((i++)) :
$day"
done
nano latihan3y.sh

#!/bin/bash
for (( i=1; i <= 5; i++ ))
do
echo "Random number $i:
$RANDOM"
done
nano latihan3z0.sh

#!/bin/bash
for ((i=1, j=10; i <= 5 ; i+
+, j=j+5))
do
echo "Number $i: $j"
done
nano latihan3z1.sh

#!/bin/bash
pilih=
until [ "$pilih" = "0" ]; do
echo ""
echo "PROGRAM MENU"
echo "1 - display free disk space"
echo "2 - display free memory"
echo ""
echo "0 - exit program"
echo ""
echo -n "Enter selection: "
read pilih
echo ""
case $pilih in
1 ) df ;;
2 ) free ;;
0 ) echo “Tekan satu key. . ." ; read -n 1; exit ;;
* ) echo “Ketikkan 1, 2, atau 0"
esac
done
nano latihan3z2.sh

echo -e : enable interpretation of
backslash escapes
tput : menggerakkan kursor di layar
Warna dan kursor

#!/bin/bash
for x in 0 1 4 5 7 8 ; do
for i in `seq 30 37`; do
for a in `seq 40 47`; do
echo -ne "e[$x;$i;$a""me[$x;$i;$a""me[0;37;40m"
done
echo;
done
done
echo " ";
nano tabwarna.sh

$ PS1="[033[0;32;40mu@h:w$ ]”
$ PS1="[033[0;37;44mu@033[0;32;43mh:033[0;33;41mw$033[0m]“
$ PS1="
[033[1;34;40m[033[1;31;40mu@h:w033[1;34;40m]033[1;37;40m
$033[0;37;0m] "
Latihan

#!/bin/bash
for (( i = 1; i <= 9; i++ ))
do
    for (( j = 1 ; j <= 9; j++ ))
    do
        tot=`expr $i + $j`
        tmp=`expr $tot % 2`
         if [ $tmp -eq 0 ]; then
             echo -e -n "033[47m “ #putih
         else
             echo -e -n "033[40m “ #Hitam
        fi
   done
echo -e -n "033[40m" #black
echo ""
done
nano latihan3z3.sh

- Memindahkan posisi kursor ke baris L kolom C :
033[<L>;<C>H
atau
033[<L>;<C>f
- Memindahkan kursor ke atas N baris :
033[<N>A
- Memindahkan kursor ke bawah N baris :
033[<N>B
- Memindahkan kursor maju N kolom :
033[<N>C
- Memindahkan kursor mundur N kolom :
033[<N>D
- Hapus layar, kursor ke (0,0) #sudut kiri atas
033[2J
- Hapus sampai akhir baris :
033[K
- Simpan posisi kursor :
033[s
- Restore posisi kursor :
033[u
Kursor

$ tput cup 2 3
$ tput clear
$ tput cols
$ tput lines
$ tput -S <<END
>clear
> cup 2 4
> END
$ tput setb 4
$ tput setf 4
$ tput bold
$ tput sgr0
$ echo `tput bold`guide`tput sgr0`
$ tput smul
$ tput rmul
$ echo `tput smul`guide`tput rmul`
$ tput civis
$ tput cnorm
Latihan

#!/bin/bash
clear
for (( i=1; i <= 5; i++ ));do
for (( j=1; j <= 100; j++ ));do
acakx=$(( RANDOM%20+5 ))
acaky=$(( RANDOM%70+10 ))
acakw=$(( RANDOM%8+1 ))
tput cup $acakx $acaky
echo -en "033[1;3${acakw};4${acakw}m*"
sleep 0.05
done
done
echo -en "033[0m"
nano blinkindark.sh

#!/bin/bash
for a in 0 1 4 5 7; do
echo "a=$a "
for (( f=0; f<=9; f++ )) ; do
for (( b=0; b <=9; b++ )) ; do
echo -ne "033[${a};3${f};4${b}m"
echo -ne "033[${a};3${f};4${b}m"
echo -ne "033[0m "
done
echo
done
echo
done
echo
nano tabelwarna.sh

#!/bin/bash
clear
for ((i=1;i<= 8; i++))
do
for ((j=1;j<= 8; j++))
do
total=$(($i+$j))
tmp=$(($total%2))
if [ $tmp -eq 0 ]
then
echo -e -n "033[47m $j " #ke samping
else
echo -e -n "033[40m $j " #ke samping
sleep 0.1
fi
done
echo "" #ke bawah
done
echo -e -n "033[0m"
nano chessboard.sh

#!/bin/bash
tput clear
tput cup 3 15
tput setaf 3
echo "XYX Appl. V.1"
tput sgr0
tput cup 5 17
# Set reverse video mode
tput rev
echo "M A I N - M E N U"
tput sgr0
tput cup 7 15
echo "1. User Management"
tput cup 8 15
echo "2. Service Management"
tput cup 9 15
echo "3. Process Management"
tput cup 10 15
echo "4. Backup"
tput bold
tput cup 12 15
read -p "Enter your choice [1-4] " choice
tput clear
tput sgr0
tput rc
nano menutput.sh

#!/bin/bash
echo -en "033[0m"
clear
warna=( 41 43 45 44 46 47 42 )
for (( i=0; i <= 6; i++ ))
do
tput cup 10 0
for (( j=1; j <= 20;j++ )) #ke kanan
do
echo -en "033[${warna[i]}m "
sleep 0.03
done
for (( j=10; j <= 20; j++ )) #ke bawah
do
tput cup $j 20
echo -en "033[s"
echo -e "033[${warna[i]}m "
done
for (( j=20; j >= 1; j-- )) #ke kiri
do
tput cup 20 $j
echo -en "033[s"
sleep 0.03
done
for (( j=20; j >= 12; j-- )) #ke atas
do
tput cup $j 0
echo -en "033[s"
sleep 0.03
done
done
echo -en "033[0m"
nano onyamuk.sh

03 tk2123 - pemrograman shell-2

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