Shell script 3

Question2:
Write a script whether the file is readable or not, if it is readable print the file content on the terminal after 5 sec

Answer:

Path="/home/kalam/filename.sh"

echo "User provide path is : $Path"

sleep 5

if [ -e $Path ]

then

        echo "file is present in the $Path"

        if [ -r $Path ]

        then

                echo "the file $Path is readable"

                info=$(cat $Path)

                echo $info

        else

                echo "file is not in readable format"

        fi

else

        echo "File is absent in the given path: $Path"

        echo "Please correct the path and rerun the script"

        echo "thank you for using this script"

fi

Output:

User provide path is : /home/kalam/filename.sh

file is present in the /home/kalam/filename.sh

the file /home/kalam/filename.sh is readable

echo "Please Provide the user name and state name" read name state_name echo "User provided name is :$name and His state name is : $state_name " if [ "$state_name" = "andra" ]; then echo "$name speaks Telugu" else echo "$name does not speak Telugu" fi

Note: 
-r flag is used check for readable the file or not if yes condition will execute

Shell script 2

 Shell scripting 2

Question:

Read the user inputs and check for that whether it is available or not ,If it is available print the user inputs are available else print not available , also your output should print after 10 Sec

Answer:

Path="/home/kalam/filename.sh"

echo "User provide path is : $Path"

sleep 10

if [ -e $Path ]

then

        echo "file is present in the $Path"

else

        echo "File is absent in the given path: $Path"

        echo "Please correct the path and rerun the script"

        echo "thank you for using this script"

fi

Output:

User provide path is : /home/kalam/filename.sh

file is present in the /home/kalam/filename.sh

Note:

-e is the flag which is used to check for the existence of the file or directory

Shell script 1

If condition

Example:

echo "Please provide the user name and state name"

read name state_name

echo "User provided name is :$name and His state name is : $state_name "

if [ "$state_name" =  "Andra" ]; then

        echo "$name speaks Telugu"

else

        echo "$name does not speak Telugu"

fi

Output:

Please Provide the user name and state name

Balakrishna andra

User provided name is :Balakrishna and His state name is : andra

Balakrishna speaks Telugu

Shell scripting

Read the user inputs and execute the script

Example1: 

echo  -n  "Please type your required info"

read info

echo "You're required information is: $info"

Example2:

read -p "Please type your required info" info

echo  "You're required information is: $info""

Example and Example2 both gives the same but, in the example1 there is no read -p

Example2 : read -p --> it will ask a query and assigned to var

Lists in TCL scripting

 LISTS keywords and It's Usage 

lindex

lindex is a keyword and it will print the index value of the list.

Example:

   set  NameList  "Naresh Prashanth Sanjeev Manoj  Rajendhar"

   puts [lindex $NameList 0] ; #it will print the 0th index of NameList i,e Naresh

   puts [lindex $NameList 1] 

   puts [lindex $NameList 2] 

         

Explanation:

List index will start from "0" 

Naresh    -----> index 0

Prashanth  ---> index 1

Sanjeev     ---> index 2

Manoj      ----> index 3

Rajendhar ---> index 4

*****************************************************************************

llength

llength is a keyword -it will give you the size of the list.

Example:           

  set  NameList  "Naresh Prashanth  Sanjeev Manoj Rajendhar"

  puts [lindex   $NameList 0] 

  puts [llength  $NameList ] ; #it will print 5 because 5 Names are there in the NameList  

****************************************************************************

lsort

lsort is a keyword -it will sort the list means ascending/Descending order of the List      

Example1:

 set  NumList  "0  9 8 1 3 4"

 puts [lsort $NumList  -ascending ] ; # it will print from small to big

 puts [lsort $NumList  -descending ] ; # it will print from big to small 

 Explanation 1:

 In this example I am taking numerical values     

 Ascending values --> small to big like 0 1 3 4 8 9

 Descending values --> big to small like 9 8 4 3 1 0

Example2:         

 set flist  "Banana Anar Avagado Watermelon Grapes Mango "

 puts [lsort $flist] ; # it will print in alphabetical order

*************************************************************************

lsearch

lsearch is a keyword to search for the element if it is matches it will return 0 otherwise it will return -1 

Example:

    set str "Nag Raju Chandu Mahi"

    lsearch $str Nag

************************************************************************

TCL Basics

 TCL  
Tool Command language

Keywords in TCL

• puts
• expr
• $
• incr
• info exists
• split
• concat

LIST keywords

• lindex
• llength
• lsort
• lreplace
• linsert
• lappend
• lsearch
• lappend

Basics power anaysis

Power

• Dynamic power:
• Power consumed by the cell when it is active mode.
• Switching Power:
• Power dissipated by the charging and discharging of the output load capacitance of a cell is called switching power.
• Switching power of a cell is a function of output load capacitance and the rate of logic transitions.
• Internal Power:
• Power dissipated by charging and discharging of internal capacitance within the boundary of the cell is called Internal power.
• Short circuit power
• Power dissipated when a small amount of time both the PMOS and NMOS transistors are turns on.
• there is short circuit established from VDD to VSS.
• Leakage power
  
• Power dissipated by the cell or circuit when it is in stand by mod or inactive mode.