Automatically back up SVN repository using shell

This script is used to automatically back up version libraries under the svn directory and traverse the libraries through awk. The advantage of this is that when someone adds a new version library, there is no need to change the code, the program will automatically recognize it.
The following program provides a comprehensive backup script

#! /Bin/sh
# Version 1.0
# Updated 2008.9.2
Svn_root = "/home/svnroot"
Svn_backup = "/home/svnbackup"
Svn_backup_server = "root @ linux36:/home/svnbackup"
CD $ svn_root
Echo "$ PWD"
Svnadmin = "$ (which svnadmin )"
Svnlook = "$ (which svnlook )"
Mydate = "$ (date + % Y % m % d )"
Tar = "$ (which TAR )"
MV = "$ (which mV )"
Rm = "$ (which RM )"
Scp = "$ (which SCP )"
For svn_repos in 'LS-L $ svn_root | awk '{print $9 }''
Do
Svn_repos_version = '$ svnlook youngest $ svn_repos'
Echo $ svn_repos_version> $ svn_backup/log/"$ svn_repos" _ version
$ SCP $ svn_backup/log/"$ svn_repos" _ version $ svn_backup_server/log/

Echo "start full backup $ svn_repos"
$ Svnadmin dump $ svn_repos> $ svn_repos $ mydate. Dump
$ Tar czvf 1_svn_repos=mydate.dump.tar.gz $ svn_repos $ mydate. Dump

$ SCP synchronized svn_repos=mydate.dump.tar.gz $ svn_backup_server
$ MV upload svn_repos=mydate.dump.tar.gz $ svn_backup
$ Rm-F $ svn_repos $ mydate. Dump
Echo "Full backup $ svn_repos succeed! "
Done