CentOS 目录结构为树？

Question

CentOS 上是否有与 tree 相同的东西？

Answer 1

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 ^^)

Answer 2

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

Answer 3

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

Answer 4

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]$ 

Answer 5

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)

Answer 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