note of SHELL (一)

#----------------------------------------
#note:copy suffix with character "r" or "g"
#   to "../test" directory

#!/bin/sh
for file in [rg]* ;do
  mv $file ../test
  done

#----------------------------------------

 

 

 

#--------------------------------------------------

echo "choose the city "
echo "1) WH"
echo "2) BJ"
echo "3) DN"

read input
case $input in
1) echo "you choose WuHan";;
2) echo "you choose BeiJin";;
3) echo "you choose DaNian";;
*) echo "input something number please!!!";;
esac

 

 

 

 

#--------------------------------------------
#name:check_file.sh
#note:check the arguments and file
#!/bin/sh

if [ $# -lt 1  ];then
  echo "usage:`basename $0` filename"
  echo
fi

if [ ! -f $2  ];then
  echo "file is not exist"
fi
  

 

 

 

#---------------------------------
#name:check_root.sh
#note:check whether the user is root

ROOT_ID=0
if [ $UID -ne $ROOT_ID ] ; then
  echo -e  "you should change to root/n"
  exit 1
  fi

if [ -z $1 ] ;then
  echo -e "miss arguments/n"
  exit 1
  fi

 

 

#-----------------------------------------------------------
#name:continue.sh
#note:print 1 through 20 except 4 and 14

for ((a=1;a<21;a++));do
 if [ $a -eq 4 ] || [ $a -eq 14 ];then
   continue
 fi
 echo "$a"
 done
 

#-----------------------------------------------------------

 

 

 

#------------------------------------------------
#name:cut.sh
#note:print usrs in this computer
#!/bin/sh
FILE="/etc/passwd"
for user in $(cut -d: -f1 $FILE);do
  echo "$user"
  done

 

 

#-----------------------------------------------------
#name:nested_loop.sh
#note:for loop function nested for function
#     output 25 lines
#!/bin/sh
LIMIT=6
for((a=1;a<LIMIT;a++));do
  echo "the out loop is $a"
for((b=1;b<LIMIT;b++));do
  echo "the inter loop is $b"
  done

done
exit 0
 

#----------------------------------------------------

 

 

 

#------------------------------------------------
#name:find_exec.sh
#note:exec function used in find,look care "/;" at
# the end of the sentense
#!/bin/sh
#find /home/peter/shell  -name "test.txt" -exec rm {} /;
find .  -name "test.txt" -exec rm {} /;

 

 

#-------------------------------------
#name:for.sh
#using  for function like C Language in shell

#!/bin/sh
LIMIT=10
for ((a=1;a<=LIMIT ; a++));do
  echo "$a"
  done
#-------------------------------------

 

 

 

 #!/bin/bash
  #This script print ip and network
 file="/etc/sysconfig/network-scripts/ifcfg-eth0"
   if [ -f $file ] ;then
                IP=`grep "IPADDR" $file|awk -F"=" '{ print $2 }'`
       MASK=`grep "NETMASK" $file|awk -F"=" '{ print $2 }'`
                echo "$IP/$MASK"
               exit 1
               fi
          

 

#------------------------------------------------------------
#name:find_dir.sh
#list dir in $1 and print the result to out.txt

#!/bin/sh
ARG=1
OUTPUT="out.txt"
if [ $# -ne "$ARG" ]
#I can not understand here,I think the option should be "-eq"

  then
  DIR=`pwd`
  else
    DIR="$1"
fi

echo "----------directory list-------------" >>$OUTPUT
echo " this shell script are following"
for file in "$(find $DIR -type d)" ;do
  echo "$file"|tee -a $OUTPUT
  done
  

 

 

#-------------------------------------------------------------
#name:nested_continue.sh
#note:"continue 2" means skipped the second for loop function

for group in 1 2 3 4 5;do
  echo "--group:$group--"
  for ((inter=1;inter<=10;inter++));do
    if [ $inter -gt 5 ];then
      continue 2
    fi
    echo "inter:$inter"
    done
    done 
exit 0

 

#-------------------------------------------------------------
#name:nested_continue.sh
#note:"continue 2" means skipped the second for loop function

for group in 1 2 3 4 5;do
  echo "--group:$group--"
  for ((inter=1;inter<=10;inter++));do
    if [ $inter -gt 5 ];then
      continue 2
    fi
    echo "inter:$inter"
    done
    done 
exit 0

 

#read.sh
#read -t 10  delay 10s during input
#!/bin/sh
echo "input in 10s "
read -t 10 a
if [ -z $a ] ;then
echo "input again"
else
echo "input finish"
fi

 

#--------------------------------------------------------
#name:select.sh
#note:usage select function
#!/bin/sh

echo "choose your favorite fruit"

select fruit banana orange apple ;do
echo
echo "your choice is  $fruit"
break
done
exit 0

 

 

#-----------------------------------
#name:shift.sh
#note:print the argument

while [ ! -e $1 ];do
  echo -e "$1/n "
 # echo
  shift
  done

 

 

 

#--------------------------------------------
#name:source.sh
#note: source function can insert other file
#      into this file

#!/bin/sh
source  test.sh
echo $a

 

 

 

#-----------------------------------
#name:while.sh
#note:input something and exit by type "end"

echo "input your sentense,type "end" to exit"
while [ "$var" != "end"  ];do   
#be careful ! $var must be quoted
  read var
  done
  exit 0
  

 

 

#------------------------------------------------
#name:test_character.sh
#note:pick out the character you input

echo "please hit a character and type enter"
read a
case $a in
[a-z] ) echo "lower character";;
[A-Z] ) echo "upper character";;
[0-9] ) echo "digital";;
* ) echo "other symbol";;
esac

 

 

 

#----------------------------------------------------
#!/bin/sh
#name:test_equal.sh
#note:test two things whether are equal
clear
if [ $# -lt 2 ];then
  echo "usage:$0 ARG1 ARG2"
  exit 1
  fi
test()
{
  case $1 in
  $2) echo "they are the same things ";;
  * )  echo "they are different";;
  esac
}

test $1 $2
exit 0

 

 

 

 

#name:test_file_exist.sh
#note:if the file in $FILE is not exist,then print warning,else print the filename
#     and file size

#!/bin/sh
FILE="random.sh
read.sh
/bin/hi
"
for a in $FILE;do
  if [ ! -e $a ];then
    echo "warning :$a is  no exist!!!"
    continue
       fi
    echo
    echo
    ls -l $a|awk  '{print "file_name:"$9 "file_size:"$5}'
    
    done

 

 

 

#----------------------------------------------
#name:tr_d.sh
#note:delete colon from $1,and output a new file
#!/bin/sh
newname=$1.u
if [ -z $1 ] ;then
  echo -e "usage:`basename $0` filename_to_convert/n"
  exit 0
  fi
  tr -d ":"< $1 >$newname