Linux tutorials
  • 👨‍💻Linux commands
  • 1️⃣grep command
  • 2️⃣find command
  • 3️⃣Pipe in Linux
  • 5️⃣xargs
  • 6️⃣Wildcards
  • 7️⃣zipping and unzipping files
  • 8️⃣sed
  • 9️⃣awk
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Wildcards

A wildcard is a character or a string of characters that can be used as a substitute for any other character(s) in a command-line expression.

PreviousxargsNextzipping and unzipping files

Last updated 1 year ago

  • * - zero or more characters

  • ? - single character

  • [] - range of characters

ls -l file*

this command prints all the files with expression file and anything after that. More clearly, it prints files starting with file and upto any characters after that.

ls -l [abc]123

can only have characters a,b and c and 123 after that

ls -l ?[123]

prints files with any first character and after that any number from 1-3

  • ^ - beginning of line

cat states.txt | grep ^A

  • $ - end of line

cat states.txt | grep sh$
6️⃣
prints file with file as starting
prints only txt files