Bash find command man
The Linux find command is very powerful. It can search the entire filesystem to find files and directories according to the search criteria you specify. Besides using the find command to locate files, you can also use it to execute other Linux commands grep , mv , rm , etc. If you just want to see some examples and skip the reading, here are a little more than thirty find command examples to get you started. Almost every command is followed by a short description to explain the command; others are described more fully at the URLs shown:.SEE VIDEO BY TOPIC: Linux Find Command Tutorial
SEE VIDEO BY TOPIC: Linux/Mac Terminal Tutorial: How To Use The find CommandContent:
Use the Unix find command to search for files
Previous Contents Next. Up until now you have seen a number of commands and their mysterious options and arguments. In this lesson, we will try to remove some of that mystery. This lesson will introduce the following commands. It is often useful to know exactly which of the four kinds of commands is being used and Linux provides a couple of ways to find out.
The type command is a shell builtin that displays the kind of command the shell will execute, given a particular command name. It works like this:. Here we see the results for three different commands. Now we know why the output from ls is displayed in color!
Sometimes there is more than one version of an executable program installed on a system. While this is not very common on desktop systems, it's not unusual on large servers.
To determine the exact location of a given executable, the which command is used:. With this knowledge of what a command is, we can now search for the documentation available for each kind of command. Optionally, you may add the -m option to change the format of the output.
For example:. Change the current directory to DIR. A null directory name is the same as the current directory. If that variable has a value, its value is used for DIR. Exit Status: Returns 0 if the directory is changed; non-zero otherwise. A note on notation: When square brackets appear in the description of a command's syntax, they indicate optional items.
A vertical bar character indicates mutually exclusive items. In the case of the cd command above:. Often it results in an error message that will reveal similar usage information. Most executable programs intended for command line use provide a formal piece of documentation called a manual or man page. A special paging program called man is used to view them. It is used like this:.
Man pages vary somewhat in format but generally contain a title, a synopsis of the command's syntax, a description of the command's purpose, and a listing and description of each of the command's options. Man pages, however, do not usually include examples, and are intended as a reference, not a tutorial. As an example, let's try viewing the man pagefor the ls command:. Most of these are stored in plain text format and can be viewed with less.
Some of the files are in HTML format and can be viewed with your web browser. This indicates that they have been compressed with the gzip compression program. The gzip package includes a special version of less called zless that will display the contents of gzip-compressed text files.
Previous Contents Top Next. Shotts, Jr. Verbatim copying and distribution of this entire article is permitted in any medium, provided this copyright notice is preserved. Previous Contents Next Working with Commands Up until now you have seen a number of commands and their mysterious options and arguments.
A command built into the shell itself. The cd command, for example, is a shell builtin. A shell function. These are miniature shell scripts incorporated into the environment.
We will cover configuring the environment and writing shell functions in later lessons, but for now, just be aware that they exist. An alias. Commands that you can define yourselves, built from other commands. This will be covered in a later lesson. Identifying Commands It is often useful to know exactly which of the four kinds of commands is being used and Linux provides a couple of ways to find out.
Getting Command Documentation With this knowledge of what a command is, we can now search for the documentation available for each kind of command.
Working with Commands
This is due in part to a complex syntax perhaps the most complex of all the standard Unix commands that aren't actually programming languages like awk ; and in part to poorly written man pages. The GNU version's man page didn't even have examples until late ! The very first thing you should do before you proceed any further is actually read your system's man page for the find command. You don't have to memorize it, or understand every part, but you should at least have looked at all the different parts of it once, so you have a general idea what's going on. Then, you might want to look at the OpenBSD man page for comparison.
In Unix-like and some other operating systems , find is a command-line utility that locates files based on some user -specified criteria and then applies some requested action on each matched object. It initiates a search from a desired starting location and then recursively traversing the nodes directories of a hierarchical structure typically a tree. The possible search criteria include a pattern to match against the filename or a time range to match against the modification time or access time of the file. By default, find returns a list of all files below the current working directory , although users can limit the search to any desired maximum number of levels under the starting directory. The related locate programs use a database of indexed files obtained through find updated at regular intervals, typically by cron job to provide a faster method of searching the entire file system for files by name.
mindepth and maxdepth in Linux find() command for limiting search to a specific directory.
How to limit search a specified directory in Linux? It searches the directory tree rooted at each given starting-point by evaluating the given expression from left to right, according to the rules of precedence, until the outcome is known the left-hand side is false for and operations, true for or , at which point find moves on to the next file name. The find command by default travels down the entire directory tree recursively, which is time and resource consuming. However the depth of directory traversal can be specified which are mindepth and maxdepth. Given below some examples to illustrate how depth of the directory traversal can be specified using mindepth and maxdepth. Reference : Linux manual page. This article is contributed by Kishlay Verma.
35 Practical Examples of Linux Find Command
A very useful aspect of the Linux command line is that the documentation for almost all command line tools is easily accessible. These documents are known as man pages, and you can easily access them through the command line using the man command. In this tutorial, we will discuss the basics of man using some easy to understand examples. But before we do that, it's worth mentioning that all examples in this article have been tested on Ubuntu
This text is a brief description of the features that are present in the Bash shell version 5. This is Edition 5. Bash contains features that appear in other popular shells, and some features that only appear in Bash. Some of the shells that Bash has borrowed concepts from are the Bourne Shell sh , the Korn Shell ksh , and the C-shell csh and its successor, tcsh.
Bash Reference Manual
The find command allows users to search for files and take actions on them. It is highly flexible, allowing you to look for files and directories based on a variety of conditions. Optionally, it also allows you to take different types of actions on the results. In this article, we will understand how to work with the find command.
On Unix-like operating systems, the find command searches for files and directories in a file system. Within each directory tree specified by the given path s, it evaluates the given expression from left to right, according to the rules of precedence see " Operators ", below until the outcome is known. At that point find moves on to the next path until all path s have been searched. It can be used on its own to locate files, or in conjunction with other programs to perform operations on those files. The -H , -L and -P options control the treatment of symbolic links. Arguments following these are taken to be names of files or directories to be examined, up to the first argument that begins with " - ", or the argument " " or "!
Linux man Command Tutorial for Beginners (8 Examples)
The Linux Find Command is one of the most important and frequently used command command-line utility in Unix-like operating systems. Find command is used to search and locate the list of files and directories based on conditions you specify for files that match the arguments. Find can be used in a variety of conditions like you can find files by permissions , users , groups , file type , date , size , and other possible criteria. Through this article, we are sharing our day-to-day Linux find command experience and its usage in the form of examples. In this article, we will show you the most used 35 Find Commands examples in Linux. We have divided the section into Five parts from basic to advance usage of the find command. Find all the files whose name is tecmint. Find all php files whose name is tecmint.
To use the find command, at the Unix prompt, enter:. Leave the double quotes in. The find command will begin looking in the starting directory you specify and proceed to search through all accessible subdirectories. You may specify more than one starting directory for searching. By default, multiple options are joined by "and".
Search a folder hierarchy for filename s that meet a desired criteria: Name, Size, File Type - see examples. GNU find searches the directory tree rooted at each given file name by evaluating the given expression from left to right, according to the rules of precedence see Operators , until the outcome is known the left hand side is false for AND operations, true for OR , at which point find moves on to the next file name. The -H, -L and -P options control the treatment of symbolic links. That argument and any following arguments are taken to be the expression describing what is to be searched for.