Regular Expressions 101

Explanation

Pro

cd the literal text cd (case sensitive)

Group 1([^ ]*?)

Negated Character Class[^ ]*?

*?matches any number of characters outside the set below:

the literal (32₁₀ / 40₈ / 20₁₆)

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

ls the literal text ls (case sensitive)

Group 2(.*?)

.*?any character (except for line terminators), repeated any number of times

the literal (32₁₀ / 40₈ / 20₁₆)

\$the literal $ (36₁₀ / 44₈ / 24₁₆)

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Match Information

Detailed match information will be displayed here automatically.

Quick Reference

25 tokens

Regular Expression

cd ([^ ]*?) \$ ls (.*?) \$

New

$ cd / $ ls dir a 14848514 b.txt 8504156 c.dat dir d $ cd a $ ls dir e 29116 f 2557 g 62596 h.lst $ cd e $ ls 584 i $ cd .. $ cd .. $ cd d $ ls 4060174 j 8033020 d.log 5626152 d.ext 7214296 k $

Substitution

$ cd / $ ls dir a 14848514 b.txt 8504156 c.dat dir d $ cd a $ ls dir e 29116 f 2557 g 62596 h.lst $ cd e $ ls 584 i $ cd .. $ cd .. $ cd d $ ls 4060174 j 8033020 d.log 5626152 d.ext 7214296 k $