From 00d4765040199832bfb1c27a24679cdc77550e26 Mon Sep 17 00:00:00 2001 From: Lynne Williams Date: Sun, 17 Feb 2013 12:11:24 -0500 Subject: [PATCH] Update shell_cheatsheet.md --- shell_cheatsheet.md | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-) diff --git a/shell_cheatsheet.md b/shell_cheatsheet.md index 7cc29ca..c4ee47f 100644 --- a/shell_cheatsheet.md +++ b/shell_cheatsheet.md @@ -165,12 +165,10 @@ continues the loop as long as the value in the variable COUNTER is less than 10 ## 6. Finding Things ### a) How to select lines matching patterns in text files... - +To find information within files, you use a command called `grep`. | Example command | Description | |-----------------|-------------| -| `grep [options] day haiku.txt` | finds every instance of the string `day` in the file haiku.txt and pipes it to standard output | - -| grep options | | +| `grep [options] day haiku.txt` | finds every instance of the string `day` in the file haiku.txt and pipes it to standard output | | |--------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | `-E` | tells grep you will be using a regular expression. Enclose the regular expression in quotes. _Note:_ the power of `grep` comes from using regular expressions. Please see the regular expressions sheet for examples | | `-i` | makes matching case-insensitive | @@ -179,12 +177,12 @@ continues the loop as long as the value in the variable COUNTER is less than 10 | `-w` | outputs instances where the pattern is a whole word | ### b) How to find files with certain properties... +To find file and directory names, you use a command called `find` + + * **`find . -type d` --> * **`-type [df]`** --> d lists directories; f lists files * **`-maxdepth n`** --> `find` automatically searches subdirectories. If you don't want that, specify the number of levels below the working directory you would like to search * **`-mindepth n`** --> starts `find`'s search n levels below the working directory - -### c) How to use one command's output as arguments to another command... -### d) How are text and binary files different?... -- 2.26.2