User:Ixo/Script/get-xo: Difference between revisions

Revision as of 11:32, 16 February 2008

(These are starting notes for a new wiki page on a possible solution for backing up a XO Laptop to a server. I needed to develop a solution for my own situation, so I might as well document and share it for others. :)

Intro

Summary

get-xo: Get a local copy/backup of your XO Laptop /home directory.

one of many methods to 'backup' a laptop 'important' (Really? which ones?) files onto a central server.

Description

From server (or any other computer), backup and copy files from XO Laptop.
Script can ran multiple times, will only copy over files which have changed.

Benefits

Creates a backup of /home/olpc in case of errors or mistaken deletions.
Allows examination of files on different machine, with better local tools and resources.
run between operations on the XO, to see files created or updated.

As of Jan 7th, 2008, the below is theory, since currently:

the default XO/ssh keys are 2048 bits long (instead of typical 1024, not sure if this is a problem)
Can't seem to get the 'enter password' prompt to go away during ssh.
Still investigating options for ssh and ssh-keygen.

SETUP

Step 1. SERVER

(i.e. who's going to grab a backup copy?)

Create a new unique user for just preforming the backups (i.e. laptopbu )
Logon as the new user
create new 'ssh security' keys for your account. (See either method #1, or #2)
Copy your 'SERVER ssh public key'.
Put file onto Laptop.

Step 2. XO Laptop

(i.e. what device to backup.)

Using Terminal or root shell' logon as olpc.
Create new file ~olpc/.ssh/authorized_keys
Copy into above file, your copy of 'SERVER ssh public key' (see above),

Step 3. SERVER

(i.e. who's going to grab a backup copy?)

#!/usr/bin/bash
#### FILE: get-ixo ########
# 2008 01 12, Iain D, ixo AT myna DOT ws
## RELEASED under CC-BY-SA-NC 3.0 license.

$ rsync --verbose --progress --times --perms --recursive --compress --links \ 
    --backup --rsh="ssh" olpc@192.168.0.12:/home /home/OLPC-BACKUP/USERNAME

NOTES:

Command is one single line.
Must setup password for olpc account, via 'root' command of $ sudo passwd olpc .
192.168.0.12 is the IP address of the OLPC XO Laptop.
/home/OLPC-BACKUP is local directory on server for the backup

Where 192.168.0.12 is the IP address of the laptop you are backing up.

Outstanding Questions

Is there an easy way of moving the ssh public key from SERVER to LAPTOP ?
- USB Drive ?
- Download via Webpage ?

Best method for figuring out unique IP address for the LAPTOP needing to be backed up?
- Via Webpage, log to specific file for rsync to use ?
- Type manually ?

Best method for uniquely identifying the LAPTOP needing to be backed up ? (use Serial Number ?)
- Is it possible for IP address to change between connection attempts?

Archive how many copies of files? only one copy? or multiple ? Limited ?
- Rsync has some of these options built in.

Background details

1. Create SERVER ssh keys with either of the following methods

 $ ssh-keygen  (pass phase can be blank, generates id_rsa and id_rsa.pub )
   (need exact steps here.. )

2. Your 'SERVER' ssh public key ( ~/.ssh/id_rsa.pub ) looks something like this.

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAyf/ux1DcURj7dyeHMPFk/zafEnuCOqJVWCb1Sy12ksEkfzoWojL1mcjXNnkfZ+P10SOlQ5kjerH7
2JBu4DqPP3NUrcuFezhST9Ixa3NU1ts1w2VKHAcAcSAq8ayBmVGzrTxq7gayT5RSvo/nvI0TXJHSSF3Jh/7hSFAKED4YOURUSE wiki@laptop.0rg

3. Your 'SERVER' ssh private key ( ~/.ssh/id_rsa ) looks something like this.

4. Your 'LAPTOP' authorized_keys ( ~olpc/.ssh/authorized_keys ) looks something like this.

(Note: Final configuration, this file should be the same as ssh public key)

ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAyf/ux1DcURj7dyeHMPFk/zafEnuCOqJVWCb1Sy12ksEkfzoWojL1mcjXNnkfZ+P10SOlQ5kjerH7
2JBu4DqPP3NUrcuFezhST9Ixa3NU1ts1w2VKHAcAcSAq8ayBmVGzrTxq7gayT5RSvo/nvI0TXJHSSF3Jh/7hSFAKED4YOURUSE wiki@laptop.0rg

5. See 'rsync --help' or 'man rsync' for full explanation of options.

6. See 'ssh --help' or 'man ssh' for full explanation of options.

@@ Line 1: / Line 1: @@
+(These are starting notes for a new wiki page on a possible solution for backing up a XO Laptop to a server.  I needed to develop a solution for my own situation, so I might as well document and share it for others. :)
-== get-ixo ==
+{{RightTOC}}
+----
+== Intro ==
 Summary
 <onlyinclude>
-* get-ixo: Get a local copy/backup of your XO Laptop /home directory.
+* get-xo: Get a local copy/backup of your XO Laptop /home directory.
+: one of many methods to 'backup' a laptop 'important' ''(Really? which ones?)'' files onto a central server.
 </onlyinclude>
@@ Line 15: / Line 21: @@
 * Allows examination of files on different machine, with better local tools and resources.
 * run between operations on the XO, to see files created or updated.
+As of Jan 7th, 2008, the below is theory, since currently:
+* the default XO/ssh keys are 2048 bits long (instead of typical 1024, not sure if this is a problem)
+* Can't seem to get the 'enter password' prompt to go away during ssh.
+* Still investigating options for ssh and ssh-keygen.
+== SETUP ==
+=== Step 1. SERVER ===
+(i.e. who's going to grab a backup copy?)
+# Create a new unique user for just preforming the backups  (i.e. laptopbu )
+# Logon as the new user
+# create new 'ssh security' keys for your account. (See either method #1, or #2)
+# Copy your 'SERVER ssh public key'.
+# Put file onto Laptop.
+=== Step 2. XO Laptop ===
+(i.e. what device to backup.)
+# Using ''Terminal'' or ''root shell' logon as olpc.
+# Create new file ''~olpc/.ssh/authorized_keys''
+# Copy into above file, your copy of 'SERVER ssh public key' (see above),
+=== Step 3. SERVER ===
+(i.e. who's going to grab a backup copy?)
  #!/usr/bin/bash
@@ Line 20: / Line 52: @@
  # 2008 01 12, Iain D, ixo AT myna DOT ws
  ## RELEASED under CC-BY-SA-NC 3.0 license.
- rsync --verbose --progress --times --perms --recursive --compress --links --rsh="ssh" \
+ $ rsync --verbose --progress --times --perms --recursive --compress --links \
-    olpc@192.168.0.12:/home /home/Downloads/OLPC-BACKUP
+     --backup --rsh="ssh" olpc@192.168.0.12:/home /home/OLPC-BACKUP/USERNAME
 NOTES:
@@ Line 28: / Line 61: @@
 * Must setup password for '''olpc''' account, via 'root' command of '''$ sudo passwd olpc''' .
 * '''192.168.0.12''' is the IP address of the OLPC XO Laptop.
-* '''/home/Downloads/OLPC-BACKUP''' is local directory for the backup
+* '''/home/OLPC-BACKUP''' is local directory on server for the backup
+Where 192.168.0.12 is the IP address of the laptop you are backing up.
+== Outstanding Questions ==
+* Is there an easy way of moving the '''ssh public key''' from SERVER to LAPTOP ?
+** USB Drive ?
+** Download via Webpage ?
+* Best method for figuring out unique IP address for the LAPTOP needing to be backed up?
+** Via Webpage, log to specific file for rsync to use ?
+** Type manually ?
+* Best method for uniquely identifying the LAPTOP needing to be backed up ? (use Serial Number ?)
+** Is it possible for IP address to change between connection attempts?
+* Archive how many copies of files? only one copy? or multiple ?  Limited ?
+** Rsync has some of these options built in.
+== Background details ==
+. Create SERVER ssh keys with either of the following methods
+  $ ssh-keygen  (pass phase can be blank, generates ''id_rsa'' and ''id_rsa.pub'' )
+    (need exact steps here.. )
+. Your 'SERVER' ssh '''public key''' ( '''~/.ssh/id_rsa.pub''' ) looks something like this.
+ ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAyf/ux1DcURj7dyeHMPFk/zafEnuCOqJVWCb1Sy12ksEkfzoWojL1mcjXNnkfZ+P10SOlQ5kjerH7
+JBu4DqPP3NUrcuFezhST9Ixa3NU1ts1w2VKHAcAcSAq8ayBmVGzrTxq7gayT5RSvo/nvI0TXJHSSF3Jh/7hSFAKED4YOURUSE wiki@laptop.0rg
+. Your 'SERVER' ssh '''private''' key ( '''~/.ssh/id_rsa''' ) looks something like this.
+ -----BEGIN RSA PRIVATE KEY-----
+ MIICWwIBAAKBgQDJ/+7HUNxRGPt3J4cw8WT/Np8Se4I6olVYJvVLLXaSwSR/Ohai
+ qMvWZyNc2eR9n4/XRI6VDmSN6sfvYkG7gOo8/c3Oty4V7OFJP0jFrc1TW2zXDZUo
+ cBwBxICrxrIG+UbOtPGruBrJPlFK+j+e8jRNckdJIXcmH/uFJ1HYOMssQwIBIwKB
+ gEVBzjW1Utn579EU3eTlDK9F7WVsLKZjivmm9QPVErX5E9PZZtiu5s0qrQnkTlb0
+NwXgVetKcpB3iYwUQ0WQa3m919JKCriMwrcA7Zqu1bS5Q48Q9v9TgydHxyKAguD
+ xerfe/HBMwLNJ1WpeEFYwHNZi+Y3k2Mpvy8XuDB5yRUrAkEA5S1kceYwXMF3P1ZR
+ Y6B/3Hy1KH5vn4YIZi5cfbHQZ2B/cK2Ak4NXERQR5sKCn1Kc7yG+fY846iLU7W2G
+ avSlbQJBAOGkPwU9aHxgR6jnoD2Ka5fUDbVQzIMc/z63kWEk6b2Pt43FVLEX/1bf
+I/eXbqwYBNNgIHPYVFrEYoLGb/3+m8CQHxpGUUlMDJaZU5EzRjTeJxDsszW7CNm
+ BI89vS5KlbR2No2gA/hOnPqkfr8ZIlZ9TeDmbrkwfftx/o+EmW1C+rcCQQCuEP1q
+ cTNYogtlCnRMuz0OuYbq9TANX4MTH+UtrsLxUZw6KoMph4p2N6P59K60lrCD61SB
+ ZXb1ql38xrwXv0wpAkEA4qsLj1QhcLSZdHuuSyLwjovqVzPB+PKJs/c+JDO0Nr6b
+ DYjugZ9YtVNLd5JEQHSkYI+TLGrCCFAKED4YOURUSE==
+ -----END RSA PRIVATE KEY-----
+. Your 'LAPTOP' authorized_keys ( '''~olpc/.ssh/authorized_keys''' ) looks something like this.
+: (Note: Final configuration, this file should be the same as ssh '''public''' key)
+ ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAIEAyf/ux1DcURj7dyeHMPFk/zafEnuCOqJVWCb1Sy12ksEkfzoWojL1mcjXNnkfZ+P10SOlQ5kjerH7
+JBu4DqPP3NUrcuFezhST9Ixa3NU1ts1w2VKHAcAcSAq8ayBmVGzrTxq7gayT5RSvo/nvI0TXJHSSF3Jh/7hSFAKED4YOURUSE wiki@laptop.0rg
+. See 'rsync --help' or 'man rsync' for full explanation of options.
+. See 'ssh --help' or 'man ssh' for full explanation of options.

User:Ixo/Script/get-xo: Difference between revisions

Revision as of 11:32, 16 February 2008

Contents

Intro

SETUP

Step 1. SERVER

Step 2. XO Laptop

Step 3. SERVER

Outstanding Questions

Background details

Navigation menu

User:Ixo/Script/get-xo: Difference between revisions

Revision as of 11:32, 16 February 2008

Intro

SETUP

Step 1. SERVER

Step 2. XO Laptop

Step 3. SERVER

Outstanding Questions

Background details

Navigation menu

Search