zgrep command in Linux with Examples

The zgrep command is used to search out expressions from a given a file even if it is compressed. All the options that applies to the grep command also applies to the zgrep command. 

Syntax:  

zgrep [grep options] Expression File name

Options: 

• -c : This option is used to display the number of matching lines for each file. 
  Example: 

zgrep -c "linux" GFG.txt.gz

• -i : This option is used to ignore case sensitivity. 
  
  Example: 

zgrep -i "LINUX" GFG.txt.gz

• -n : This option is used to display the line number of file if the given expression is present in the line. 
  Example: 

zgrep -n "linux" GFG.txt.gz

• -v : This option is used to display the lines which doesn't have the expression present in it. Basically invert the search function. 
  Example: 

zgrep -v "linux" GFG.txt.gz

• -e : This option is used to specify the expression but can be used multiple times. 
  Example: 

zgrep -e "linux" -e "Linux" GFG.txt.gz

• -o : This option is used to display only the matched section of the line from the given expression. 
  Example: 

zgrep -o "linux" GFG.txt.gz

• -l : This option is used to display the names of the files with the expression present in it. 
  Example: 

zgrep -l "linux" *

• -w : By default, zgrep command displays lines even if the expression is found as a sub-string. This option only displays lines only if the whole expression is found. 
  Example: 

zgrep -w "linux" GFG.txt.gz

• -h : This option is used to display the matched lines but doesn't display the file names. 
  Example: 

zgrep -h "linux" GFG.txt.gz