CentOS directory structure as tree?

Is there an equivalent to tree o开发者_运维百科n CentOS?

If tree is not installed on your Centos system (I typically recommend server setups to use minimal install disk anyhow) you should type the following at your command line:

# yum install tree -y

If this doesn't install it's because you don't have the proper repository. I would use the Dag Wieers repository:

http://dag.wieers.com/rpm/FAQ.php#B

After that you can do your install:

# yum install tree -y

Now you're ready to roll. Always read the man page: http://linux.die.net/man/1/tree

So quite simply the following will return a tree:

# tree

Alternatively you can output this to a text file. There's a ton of options too.. Again, read your man page if you're looking for something other than default output.

# tree > recursive_directory_list.txt

(^^ in a text file for later review ^^)

You can make your own primitive "tree" ( for fun :) )

#!/bin/bash
# only if you have bash 4 in your CentOS system
shopt -s globstar
for file in **/*
do
    slash=${file//[^\/]}
    case "${#slash}" in
        0) echo "|-- ${file}";;
        1) echo "|   |--  ${file}";;
        2) echo "|   |   |--  ${file}";;
    esac
done

As you can see here. tree is not installed by default in CentOs, so you'll need to look for an RPM and install it manually

Since tree is not installed by default in CentOS ...

[user@CentOS test]$ tree
-bash: tree: command not found
[user@CentOS test]$ 

You can also use the following ls command to produce almost similar output with tree

ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/   /' -e 's/-/|/'

Example:

[user@CentOS test]$ ls -R | grep ":$" | sed -e 's/:$//' -e 's/[^-][^\/]*\//--/g' -e 's/^/   /' -e 's/-/|/'
   .
   |-directory1
   |-directory2
   |-directory3
[user@CentOS directory]$ 

You have tree in the base repo.

Show it (yum list package-name):

# yum list tree
Available Packages
tree.i386               1.5.0-4               base

Install it:

yum install tree

(verified on CentOS 5 and 6)

I need to work on a remote computer that won't allow me to yum install. So I modified bash-o-logist's answer to get a more flexible one.

It takes an (optional) argument that is the maximum level of subdirectories you want to show. Add it to your $PATH, and enjoy a tree command that doesn't need installation.

I am not an expert in shell (I had to Google a ton of times just for this very short script). So if I did anything wrong, please let me know. Thank you so much!

#!/bin/bash
# only if you have bash 4 in your CentOS system

shopt -s globstar # enable double star

max_level=${1:-10}

for file in **
do
    # Get just the folder or filename
    IFS='/'
    read -ra ADDR <<< "$file"
    last_field=${ADDR[-1]}
    IFS=' '

    # Get the number of slashes
    slash=${file//[^\/]}
    
    # print folder or file with correct number of leadings
    if [ ${#slash} -lt $max_level ]
    then
        spaces="   "
        leading=""
        if [ "${#slash}" -gt 0 ]
        then
            leading=`eval $(echo printf '"|${spaces}%0.s"' {1..${#slash}})`
        fi
        echo "${leading}|-- $last_field"
    fi
done