diff --git a/README.md b/README.md
index 7feb9218..ea96b57e 100644
--- a/README.md
+++ b/README.md
@@ -42,24 +42,48 @@ s.n. dasgupta
 ### Display the content of the files
 cat < file1
 ## OUTPUT
-
-
-
+```
+chanchal singhvi
+c.k. shukla
+s.n. dasgupta
+sumit chakrobarty
+^d
+```
 cat < file2
 ## OUTPUT
-
-
+cat > file2
+```
+anil aggarwal
+barun sengupta
+c.k. shukla
+lalit chowdury
+s.n. dasgupta
+^d
+```
 # Comparing Files
 cmp file1 file2
-## OUTPUT
+
  
-comm file1 file2
  ## OUTPUT
+![303979828-3d17b2b3-39c8-43a8-abdc-519c900acba8](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/75a5512e-1a3b-45f7-ad9a-369f872d4e8a)
+
+
+
+comm file1 file2
 
- 
-diff file1 file2
 ## OUTPUT
 
+![303980017-9f15abc6-fa53-4ce6-9690-41d0c5527c64](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/06aaf5ba-ea64-4e0c-8499-115f566e830f)
+
+
+
+diff file1 file2
+
+
+##OUTPUT
+![303980022-6f0df5d6-6dc0-473f-8764-8f8788dc1423](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/dd5d576c-fdad-4142-8a42-957143d516bb)
+
+
 
 #Filters
 
@@ -83,16 +107,18 @@ cat > file22
 cut -c1-3 file11
 ## OUTPUT
 
+![303980526-e74cc399-e869-4514-9294-e4d66bdbb553](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/057abf47-bdbc-4ed1-b8c0-df0302401aad)
 
 
 
 cut -d "|" -f 1 file22
 ## OUTPUT
 
-
+![303980625-45a81470-3b96-4c0b-9c34-21ef65d280c1](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/64f3b346-85d6-40e6-a5ca-0795b38c67c2)
 
 cut -d "|" -f 2 file22
 ## OUTPUT
+![303980718-81235175-e464-4178-a1da-d78a36605b9b](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/26e24d41-1567-4bb7-a427-463ae5f32f95)
 
 
 cat < newfile 
@@ -108,10 +134,12 @@ hello world
 grep Hello newfile 
 ## OUTPUT
 
+![304111559-7d5dc360-1c3a-4ec4-9367-a9d3ebf3da9d](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/a75c35a9-3407-45bb-a60c-51ac39e93dd0)
 
 
 grep hello newfile 
 ## OUTPUT
+![304111717-3b622860-62e3-4eba-88ad-9644765927df](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/1fed07d9-9937-4958-934c-dae3f0c403d3)
 
 
 
@@ -119,10 +147,12 @@ grep hello newfile
 grep -v hello newfile 
 ## OUTPUT
 
+![304112410-0a4e551a-c35b-4f53-a343-e0c41baeefdf](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/675e0427-572c-4aca-953c-cc45455944ae)
 
 
 cat newfile | grep -i "hello"
 ## OUTPUT
+![304112674-10be401c-081e-4138-af1f-88aa41158c77](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/8dea6fe3-2ada-4ab9-ae14-db1f7eaa36f7)
 
 
 
@@ -130,17 +160,15 @@ cat newfile | grep -i "hello"
 cat newfile | grep -i -c "hello"
 ## OUTPUT
 
-
+![304113192-a2eb2603-767e-486a-bb38-c9e1f53f51a3](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/fd4ce646-de28-4957-83b6-e305c1f4439a)
 
 
 grep -R ubuntu /etc
 ## OUTPUT
-
-
-
 grep -w -n world newfile   
 ## OUTPUT
 
+![304114184-cb370c18-be74-432d-9314-51f331acf7df](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/dfaf1853-3e52-470b-9bc5-38d3057ce4b2)
 
 cat < newfile 
 ```
@@ -164,58 +192,70 @@ Linux is best in this World
 egrep -w 'Hello|hello' newfile 
 ## OUTPUT
 
+![304114445-2d621e3e-9f9a-44ac-a6db-043fdba5cc21](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/63f44836-f6b6-4d66-bdf4-9a53fb6fe0d4)
 
 
 egrep -w '(H|h)ello' newfile 
 ## OUTPUT
 
 
+![304114664-f2413676-3063-4310-9007-e31987305c59](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/8cc574fc-24a7-4e1d-bfd0-56ca0ff8dd45)
 
 egrep -w '(H|h)ell[a-z]' newfile 
 ## OUTPUT
 
+![304116131-7a74a2cf-5316-47fc-8448-8cae00930409](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/50e2bb9b-2c9b-4df4-9d46-903adbd0e6da)
 
 
 
 egrep '(^hello)' newfile 
 ## OUTPUT
+![304751858-2097ab41-753f-4c27-bf30-f3c2b3edd826](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/67ad9538-9b91-423e-8266-1fb2edbc9d40)
 
 
 
 egrep '(world$)' newfile 
 ## OUTPUT
 
+![304752068-d6105214-5e17-4bcf-82c9-256ac369f797](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/6339ba41-1e5e-443d-825d-b2809e856a19)
 
 
 egrep '(World$)' newfile 
 ## OUTPUT
 
+![304752280-d3019e06-e463-45ab-bf66-985f54a7edb9](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/fb6711f3-9556-4718-a749-555f06debab1)
 
 egrep '((W|w)orld$)' newfile 
 ## OUTPUT
+![304752550-c0c28d29-8373-4c75-b10a-e3a1ee97271a](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/cc9d61d6-82b4-42a2-a3eb-593038c19fc7)
 
 
 
 egrep '[1-9]' newfile 
 ## OUTPUT
+![304752743-d525b4d0-ceaf-456e-b23e-98fc98180629](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/6d099778-2b88-4e6f-8b06-c40b2f09a638)
 
 
 
 egrep 'Linux.*world' newfile 
 ## OUTPUT
+![304753008-b3b81c41-51b4-406b-b712-21a2a4c9d97c](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/d1c365df-03a4-4e54-928e-4a381e058096)
 
 
 egrep 'Linux.*World' newfile 
 ## OUTPUT
 
+![304753573-6bb38c3a-f787-4522-9190-8a797f9ec430](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/591ab9e6-e543-40a3-a4ec-f9012f8ceadf)
 
 egrep l{2} newfile
 ## OUTPUT
 
+![304754057-82fd9878-0b30-4a54-8ab5-18dd15381f65](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/98619322-54a4-4a4c-ad34-fa84af7dfff4)
 
 
 egrep 's{1,2}' newfile
 ## OUTPUT 
+![304754458-c92a0337-816f-4d2f-a34d-6748b3cb1bee](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/91245c5a-f669-4b1c-8641-44667f0689f7)
 
 
 cat > file23
@@ -234,79 +274,97 @@ cat > file23
 
 sed -n -e '3p' file23
 ## OUTPUT
+![304757591-a648b63d-4908-491b-83e2-15d2a6549860](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/6067006c-52ab-4263-bb7c-8675a5cba9d7)
 
 
 
 sed -n -e '$p' file23
 ## OUTPUT
-
-
-
 sed  -e 's/Ram/Sita/' file23
 ## OUTPUT
 
+![304758431-084144ca-9506-4676-8b2a-4ce86686c9e6](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/ea154aa6-2031-4bc9-a5fa-d246da2078ce)
 
 
 sed  -e '2s/Ram/Sita/' file23
 ## OUTPUT
 
 
+![304758637-033e8dc7-f710-400f-9fa0-78d15ed14fce](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/b35d81b6-ed9b-4d25-b8cb-d3ca5c25fdf0)
 
 sed  '/tom/s/5000/6000/' file23
 ## OUTPUT
 
+![304759583-b67f110e-2c70-4583-a1be-a37ad91ad49d](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/e6e1ba26-5291-43fd-8f40-d6fe00a20498)
 
 
 sed -n -e '1,5p' file23
+
 ## OUTPUT
 
+![304759738-4539c59e-1967-4511-aa85-02e0193a1e13](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/d727de65-8c1f-474b-a1a7-2d87bbc4b354)
+
 
 
 sed -n -e '2,/Joe/p' file23
 ## OUTPUT
 
+![304759889-30234a9f-dd11-4ae5-b7a5-9045148072a0](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/ca6da655-591e-498b-9afb-e9bcd8e09c64)
 
 
 
 sed -n -e '/tom/,/Joe/p' file23
 ## OUTPUT
 
+![304766794-9a68ec8b-c637-4d4f-b099-279531805f0b](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/7a82bd4e-4d0e-4340-89d1-882aa938ae94)
+
 
 
 seq 10 
 ## OUTPUT
 
+![304767015-a6426c76-366f-4acd-9a74-05d4c22cd1ef](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/fa19b57d-1c9d-4bef-81a8-159ef1e802be)
 
 
 seq 10 | sed -n '4,6p'
 ## OUTPUT
 
+![304767368-be70bf5e-1699-41fc-aa85-bdcde8e946ca](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/a4650fd0-7816-4e90-88fe-036a692d2e76)
 
 
 seq 10 | sed -n '2,~4p'
 ## OUTPUT
 
+![304767623-4dae8842-394b-4660-98d8-f1ff6de58121](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/e76d46db-4e87-4616-adf3-209f22705a28)
 
 
 seq 3 | sed '2a hello'
 ## OUTPUT
 
 
+![304768147-98a1731b-3015-45f1-ba23-6cb031f09c8d](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/b251a39b-a769-44e6-aca2-a4a33e8afc48)
 
 seq 2 | sed '2i hello'
-## OUTPUT
+##OUTPUT
+
+![304768296-37f79adc-6b21-4499-bbfa-d74aeae1461a](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/50840e06-7531-454b-893b-82157fa696d9)
 
 
 seq 10 | sed '2,9c hello'
 ## OUTPUT
 
+![304768441-9c4330d4-0447-451d-a81a-cf358636d16d](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/02460176-5dbc-4cd3-86e2-676ef79130bc)
+
 
 sed -n '2,4{s/^/$/;p}' file23
 ## OUTPUT
 
-
+![304768689-da40ce9b-3d87-4252-90db-988a1f344a81](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/757e595f-068c-4a2d-9a74-a0c5c280d674)
 
 sed -n '2,4{s/$/*/;p}' file23
+##OUTPUT
+
+![304769027-3459be51-4d3f-4d3b-a8ad-e63a1fcadd62](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/3a948998-5ccc-471c-8301-871e4f040ac5)
 
 
 #Sorting File content
@@ -321,6 +379,7 @@ cat > file21
 sort file21
 ## OUTPUT
 
+![304769719-6ddff4be-6d23-46ab-9e48-2d436930fea3](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/9dcd56c0-8260-4a34-a658-4a9bedfc00a6)
 
 cat > file22
 ```
@@ -335,11 +394,15 @@ uniq file22
 ## OUTPUT
 
 
+![304771138-0b50c2dc-0ef6-4965-92c6-5b0ff5735bd1](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/10564297-a8ca-42e7-9e7b-11d2f5823b34)
+
 
 #Using tr command
 
 cat file23 | tr [:lower:] [:upper:]
  ## OUTPUT
+ 
+![304771761-734761d9-86e9-4b02-9948-1a8de5e92c36](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/9ddada14-d8d3-4b5a-a383-4e756bac6c9c)
 
 cat < urllist.txt
 ```
@@ -358,16 +421,19 @@ cat urllist.txt | tr -d ' '
  ## OUTPUT
 
 
- 
+ ![304797034-9a10a40c-28d3-4c0d-929f-609b1615fb79](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/a3958730-a84b-4be3-934c-75127fd45e20)
+
 cat urllist.txt | tr -d ' ' | tr -s '.'
 ## OUTPUT
 
+![304797372-2499ab97-1897-440e-b6b7-2d2f3a95a31a](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/36ba05c2-828f-4cf0-b89c-7704eb2a9ca0)
 
 
 #Backup commands
 tar -cvf backup.tar *
 ## OUTPUT
 
+![304797792-7f1581bd-5f95-4e4e-866f-1699b6f40de5](https://github.com/23004513/OS-Linux-commands-Shell-script/assets/138973069/59aebb74-5bab-4b16-856c-0702c0987aa0)
 
 mkdir backupdir
  
@@ -375,17 +441,12 @@ mv backup.tar backupdir
  
 tar -tvf backup.tar
 ## OUTPUT
-
-
 tar -xvf backup.tar
 ## OUTPUT
-
 gzip backup.tar
-
 ls .gz
 ## OUTPUT
- 
-gunzip backup.tar.gz
+ gunzip backup.tar.gz
 ## OUTPUT
 
  
@@ -397,8 +458,6 @@ echo 'echo Hello World‘; exit 0 >> my-script.sh
 chmod 755 my-script.sh
 ./my-script.sh
 ## OUTPUT
-
- 
 cat << stop > herecheck.txt
 ```
 hello in this world
@@ -409,8 +468,6 @@ stop
 
 cat herecheck.txt
 ## OUTPUT
-
-
 cat < scriptest.sh 
 ```bash
 \#!/bin/sh
@@ -447,26 +504,17 @@ chmod 777 scriptest.sh
 ./scriptest.sh 1 2 3
 
 ## OUTPUT
-
- 
 ls file1
 ## OUTPUT
-
 echo $?
 ## OUTPUT 
 ./one
 bash: ./one: Permission denied
- 
-echo $?
+ echo $?
 ## OUTPUT 
- 
-abcd
- 
-echo $?
+ abcd
+ echo $?
  ## OUTPUT
-
-
- 
 # mis-using string comparisons
 
 cat < strcomp.sh 
@@ -496,15 +544,10 @@ echo "$val1 is less than $val2"
 fi
 ```
 ##OUTPUT
-
-
-
 chmod 755 strcomp.sh
  
 ./strcomp.sh 
 ## OUTPUT
-
-
 # check file ownership
 cat < psswdperm.sh 
 ```bash
@@ -530,7 +573,6 @@ fi
  ```
 ./psswdperm.sh
 ## OUTPUT
-
 # check if with file location
 cat>ifnested.sh 
 ```bash
@@ -576,9 +618,6 @@ fi
 
 ./ifnested.sh 
 ## OUTPUT
-
-
-
 # using numeric test comparisons
 cat > iftest.sh 
 ```bash
@@ -618,9 +657,8 @@ fi
 
 $ chmod 755 iftest.sh
  
-$ ./iftest.sh 
+$ ./iftest.sh
 ##OUTPUT
-
 # check if a file
 cat > ifnested.sh 
 ```bash
@@ -666,10 +704,8 @@ fi
 ```
 
 $ chmod 755 ifnested.sh
- 
-$ ./ifnested.sh 
+ $ ./ifnested.sh 
 ##OUTPUT
-
 # looking for a possible value using elif
 cat elifcheck.sh 
 ```bash
@@ -694,11 +730,8 @@ fi
 ```
 
 $ chmod 755 elifcheck.sh
- 
 $ ./elifcheck.sh 
 ## OUTPUT
-
-
 # testing compound comparisons
 cat> ifcompound.sh 
 ```bash
@@ -713,7 +746,6 @@ fi
 $ chmod 755 ifcompound.sh
 $ ./ifcompound.sh 
 ## OUTPUT
-
 # using the case command
 cat >casecheck.sh 
 ```bash
@@ -730,9 +762,7 @@ echo "Sorry, you are not allowed here";;
 esac
 ```
 $ chmod 755 casecheck.sh 
- 
 $ ./casecheck.sh 
- 
 cat > whiletest
 ```bash
 #!/bin/bash
@@ -890,8 +920,6 @@ $ chmod 755 fornested1.sh
  
 $ ./fornested1.sh 
  ## OUTPUT
-
- 
 cat forbreak.sh 
 ```bash
 #!/bin/bash
@@ -907,7 +935,6 @@ done
 echo "The for loop is completed“
 ```
 ## OUTPUT
-
 $ chmod 755 forbreak.sh
  
 $ ./forbreak.sh 
@@ -946,8 +973,6 @@ $ chmod 755 exread.sh
  
 $ ./exread.sh 
 ## OUTPUT
-
-
  cat exread1.sh
 ```bash
 #!/bin/bash
@@ -980,11 +1005,7 @@ fi
 ```
 ## OUTPUT
  ./funcex.sh 
-
- 
  ./funcex.sh 1 2
-
- 
 cat argshift.sh
 ```bash
 #!/bin/bash 
@@ -1027,9 +1048,7 @@ set +x
 ```
 ## OUTPUT
  ./argshift.sh 1 2 3
- 
- 
-cat > nc.awk
+ cat > nc.awk
 ```bash
 BEGIN{}
 {
@@ -1058,8 +1077,7 @@ ubcdfghj
 ```
 awk -f nc.awk data.dat
 ## OUTPUT 
- 
-cat > palindrome.sh
+ cat > palindrome.sh
 ```bash
 #num=545
 echo "Enter the number"
@@ -1085,7 +1103,5 @@ else
 fi
 ```
 ## OUTPUT 
-
-
 # RESULT:
 The Commands are executed successfully.