LinuxShell脚本编程实例_linuxshell脚本实例
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#!/bin/sh echo “Current command is $0” echo “The first parameter is $1” echo “The second parameter is $2” echo “The third parameter is $3” echo “Total of parameters if $#” echo “Current PID is $$”
#!/bin/bash times=0 until [ “$times” = 3 ];do
echo “I love linux.”
sleep 2
times=`expr $times + 1` done
#!/bin/bash # menu shell script.samli
2004.4.19 until
echo “List Directory..........1”
echo “Change Directory........2”
echo “Edit File...............3”
echo “Remove File.............4”
echo “Exit Menu...............5”
read choice
test $choice = 5 do
case $choice in
1)ls;;
2)echo “enter target directory:”
read dir
cd $dir
;;
3)echo “enter file name:”
read file
vi $file
;;
4)echo “enter file name:”
read file
rm $file
;;
5)echo “Goodbye”
;;
*)echo “illegal option, please input again.”
esac done
#!/bin/sh var1=“abcd efg” echo $var1 var2=1234 echo “The value of var2 is $var2” echo $HOME echo $PATH echo $PWD
#!/bin/sh num=0 while [ $num-le 10 ] do
num=`expr $num + 1`
if [ $num-eq 5 ]
then
continue
fi
square=`expr $num * $num`
echo $square done
#!/bin/bash
# Gnu bash versions 2.x # The Party Program--Invitations to friends from the # “guest” file
guestfile=./guests # ~/shell/guests if [[!-e “$guestfile” ]] then
printf “${guestfile##*/} non-existent”
exit 1 fi export PLACE=“Sarotini's”((Time=$(date +%H)+ 1))set cheese crackers shrimp drinks “hot dogs” sandwiches for person in $(cat $guestfile)do
if [[ $person = root ]]
then
continue
else
# Start of here document
mail-v-s “Party” $person
Hi ${person}!Please join me at $PLACE for a party!
Meet me at $Time o'clock.I'll bring the ice cream.Would you please bring $1
and anything else you would like to eat? Let me know
if you can't make it.Hope to see you soon.Your pal,ellie@$(hostname)
FINIS
shift
if(($# == 0))
then
set cheese crackers shrimp drinks “hot dogs” sandwiches
fi
fi done
printf “Bye...”
#!/bin/sh
# Standard AT&T Bourne Shell
# The Party Program--Invitations to friends from the # “guest” file
guestfile=./guests # /home/ellie/shell/guests if [!-f “$guestfile” ] then
echo “慴asename $guestfile?non-existent”
exit 1 fi PLACE=“Sarotini's” export PLACE Time=`date +%H` Time=`expr $Time + 1` set cheese crackers shrimp drinks “hot dogs” sandwiches for person in $(cat $guestfile)do
if [ $person = root ]]
then
continue
else
# Start of here document
mail-v-s “Party” $person
Hi $person!Please join me at $PLACE for a party!
Meet me at $Time o'clock.I'll bring the ice cream.Would you please bring $1
and anything else you would like to eat? Let me know
if
you can't
make it.Hope to see you soon.Your pal,ellie@`hostname`
FINIS
shift
if [ $#-eq 0 ]
then
set cheese crackers shrimp drinks “hot dogs” sandwiches
fi
fi done
echo “Bye...”
#!/bin/sh # Scriptname: args # Script to test command line arguments echo The name of this script is $0.echo The arguments are $*.echo The first argument is $1.echo The second argument is $2.echo The number of arguments is $#.oldargs=$* set Jake Nicky Scott
# reset the positional parameters echo All the positional parameters are $*.echo The number of postional parameters is $#.echo “Good~Vbye for now, $1 ” set $(date)
# reset the positional parameters echo The date is $2 $3, $6.echo “The value of $oldargs is $oldargs.” set $oldargs echo $1 $2 $3 # Name: bigfiles # Purpose: Use the find command to find any files in the root # partition that have not been modified within the past n(any # number within 30 days)days and are larger than 20 blocks #(512 byte blocks)
if(($#!= 2))# or
[ $#-ne 2 ] then
echo “Usage: $0 mdays size ” 1>&2
exit 1 fi if(($1 0 || $1 > 30))# or [ $1-lt 0-o $1-gt 30 ] then
echo “mdays is out of range”
exit 2 fi if(($2 # or [ $2-le 20 ] then
echo “size is out of range”
exit 3 fi find /-xdev-mtime $1-size +$2
#!/bin/bash # Scriptname: checker # Script to demonstrate the use of special variable # modifiers and arguments name=${1:?“requires an argument” } echo Hello $name #!/bin/bash # This is the first Bash shell program of the day.# Scriptname: greetings # Written by: Barbara Bashful echo “Hello $LOGNAME, it's nice talking to you.” echo “Your present working directory is `pwd`.” echo “You are working on a machine called `uname-n`.” echo “Here is a list of your files.” ls
# list files in the present working directory echo “Bye for now $LOGNAME.The time is `date +%T`!” #!/bin/bash # Scriptname: greetings2 echo “This script is called $0.” echo “$0 $1 and $2” echo “The number of positional parameters is $#” #!/bin/bash # Scriptname: idcheck # purpose:check user id to see if user is root.# Only root has a uid of 0.# Format for id output:uid=9496(ellie)gid=40 groups=40
# root's uid=0
id=`id | gawk-F'[=(]' '{print $2}'`
# get user id echo your user id is: $id if((id == 0))# or [ $id-eq 0 ] then
echo “you are superuser.” else
echo “you are not superuser.” fi
