Questions in: Shell Script

SH refers to Bourne Shell, which is someway the reference Shell to a lot of other Shells, and defintaly to the Bash Shell, which literally is : Bourne Again Shell. By this time and date (2015), Bash is to be preferred over Bourne, and Bourne is supposed to be limited too much ... but, still used a lot. Obviously, in a technical way, there's a lot of interesting commands that work only with Bash, not with Bourne (and presumingly, never the other way round). So, bottom line : Bourne is limited but very compatible, Bash is better but slightly limited. The latter largely depends on environments.

x=`cut -f4 ram.txt`
y=`cut -f5 krish.txt`
z=`expr x-y`
if (z==5)
then echo 5
else
w= `expr 5*z`
echo $w
fi

you can use CYGWIN which can be installed on various Windows platform.

echo enter filename
read file
for n in `cat $file`
do
i=`expr $n % 2`
if [ $i -eq 0 ]
then
echo $n>>even.txt
else
echo $n>>odd.txt
fi
done

echo "Enter the file name"
read file
awk '$NF % 2 == 0' $file > file1.txt
awk '$NF % 2 != 0' $file > file2.txt

$ java weblogic.version -verbose
(OR)
$ java weblogic.utils.Versions
(OR)
java weblogic.Admin -url ManagedHost:8001 -username weblogic
-password weblogic VERSION

for var in `ls -1S` === -S sort the file primary key as
size of the file and -1 column o/p
do
if [[ $i -eq 5 ]]
then
break;
fi
print $var
let i=i+1;
done
Same code can be used for time and ls command option will be
ls -1t

practcal withe vmware
unix

while running the script using this "./" script run from
curent location we have to give executable permision to the
script file
By default file contains 644 permissions there is no
execute permission while running it shows error
use `chmod` to give execute permission and run
where as "sh" it runs the script with the help of default
shell

Yes..:)
just open unix prompt
vi " " or vi "ab cd"
echo "jagadeeb"
:wq
just give permission :)like
chmod 777 " " or chmod 777 "ab cd"
and run that like
./" " or ./"ab cd"
out put like
jagadeeb
jagadeeb@gmail.com

Unix-legitimate filenames are any combination of these
three classes of characters: Upper and lower case letters:
A - Z and a - z
Numbers 0 - 9
Periods, underscores, hyphens . _ -
Note that line spaces (aka "whitespace") are not allowed in
filenames. The Unix shell will think you mean more than one
file.

awk 'NR % 50 == 0' print

awk 'NR % 50 ==0 {print}' filename

Sorry Sudhir,
Your syntax is wrong.It should be
paste file1 file2|cut -d " " -f2,3,4
But this command is n't providing the correct result.
Piz try another.

paste file1 file2 | cut -f 2,3,4 -d " "

read line;
echo $line | awk '{ for ( i = NF; i > 0; i--) print $i}' |
tr "n" " "

cho "Enter Choice"
read num
case $num in
1) echo `date`
;;
2) ls
;;
3) who
;;
*) echo "Wrong option press 1 2 3 only"
;;
esac

echo "Enter the number"
read i
if [ $i -eq 1 ];then
echo `date`
elif [ $i -eq 2 ];then
ls
elif [ $i -eq 3 ];then
who
else
echo "Nothing"
fi

write code like this :
#!/bin/bash
echo "My script2 call"
/bin/bash ./script2.sh [ or /bin/ksh ./script2.sh ]
It will run ..... enjoy !!!!!!

instead of
. script2.sh
Just try
sh script2.sh
It will Run

1.Data Abstraction
2.Data Encapsulation
3.Polymorphism
4.Inheritance