Display all the lines in unixPasswd that contain at least 10 consecutive lowercase letters. How many names are there in total that meets this criteria?

Answer and Explanation:

To display 10 consecutive lower case letters in Unix, we make use of the commands below. The first command finds the letters in the file and the second command counts them line by line.

$ grep '[a-z]\{10,\}' /unixPasswd/passwd

# this command displays lines with at least 10 consecutive lowercase letters or more than 10 consecutive lowercase letters

$ grep '[a-z]\{10,\}' /unixPasswd/passwd | wc -l

# this command counts the number of lines that has at least 10 consecutive lower case letters or more than 10 consecutive lowercase letters

Note: the unixPasswd is a file in passwd file. The # is used when we want to add comments, is optional here. The $ is a prompt on the terminal that begins a new command.