Replace single spaces and hyphens between spaces in file names - Test echo of filename

Replace single spaces and hyphens between spaces in file names - Remove first echo to commit changes.

It substitutes the old string with the new one mentioned.

Duplicates the replaced line with /p flag.

Inserts one blank line after every line.

Inserts a blank line after each line that matches the string learn

insert one blank line after each line

delete blank lines and insert blank line after each line 

number each line of a file . "=" is used to number each line. "\" is used for tab between number and sentence

number each line of file, only if line is not blank

delete a particular line

delete the last line

delete the last line

delete line line from 3 to 5 lines

delete the pattern matching line

delete lines starting from nth line and every 2nd line from there

view a file from 2 to 5 line range

print nth file of the file

 print the line that matches the pattern

change the first occurance of the pattern

replace the nth occurance of a pattern of line

replacing all the occurance of pattern of line

replace a pattern with other except the nth line

this command is used to replace the text in a file

replacing all the occurances of the pattern in a line

replacing the string in a specific line

the /p orint flag prints the repalced line twice on the terminal.

 printing only the replaced lines

 printing only the replaced lines

delete a particular line

delete the last line

delete pattern matching line

it executes more than 2 or 3 sed commannds at a time

-s replaces red word to blue in the given file

the above command will limit the sed command to operate on the 3rd line

the above command will insert colors before are bright

the above command will append the text

the above command will append the text

the 2nd will be moified to manago is in yellow

this command transforms ethe letters with abc to def 

gives the line numbers to the line in the color.txt fike

gives the line number  in which mango word is there

it modifies the apple is red with line updated  in colors.txt