Linux T&T » Ssh

SSH Reverse DNS Lookup Disable

WladyX — Thu, 15 Dec 2011 18:36:04 +0000

/etc/ssh/sshd_config:

UseDNS no

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ssh-keygen & ssh-copy-id

WladyX — Wed, 14 Dec 2011 16:19:01 +0000

ssh-keygen ssh-copy-id -i ~/.ssh/id_rsa.pub root@ip

SSHplus

WladyX — Fri, 14 Oct 2011 09:17:54 +0000

sshplus rename to sshplus.py

If there is no icon, change:
ind = appindicator.Indicator("simplestarter", "network-transmit-receive",

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Force ssh to ask for password

WladyX — Thu, 22 Sep 2011 10:16:36 +0000

ssh -o PreferredAuthentications=password user@host.com

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rsync your Android

WladyX — Fri, 05 Aug 2011 11:17:30 +0000

In combination with dropbear or QuickSSH rsync allows you to back up your android. Here’s how to.

Getting the binaries

You can find the binaries here.

Download:

wget http://adqmisc.googlecode.com/svn/trunk/androidutils/rsync/rsync-3.0.6-arm-softfloat-linux-gnueabi.gz

Decompress:

zcat rsync-3.0.6-arm-softfloat-linux-gnueabi.gz > rsync

Copy rsync to your phone, make sure it’s in the PATH and chmod 755 rsync. I have put mind to QuickSSH’s homedir (/data/data/com.teslacoilsw.quicksshd/dropbear or /data/data/berserker.android.apps.sshdroid/dropbear).

Examples

Here are a few examples that can be scripted.

Initiate a backup from your phone:

  rsync  -e "ssh -p " -vrt  @:/
  e.g. rsync -e "ssh -p 443" -vrt /mnt/sdcard/astrid me@:/home/me/temp

Initiate a backup from your server:

  rsync rsync -vrt -e "ssh -p " @:/ 
  e.g. rsync -vrt -e "ssh -p 2222" @android:/mnt/sdcard/astrid /home/me/temp

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Configuring QuickSSHD for pub/privkey

WladyX — Fri, 05 Aug 2011 11:10:56 +0000

1. Create a dsa-key-pair on your linux client

  ssh-keygen -t dsa -f id_dsa-android

Note: I named the key id_dsa-android because that’s my own convention

2. Copy the public key to your Android device

  scp -P 2222 id_dsa-android.pub :/sdcard

Note: This assumes you have password enabled and sshd running on port 2222

3. Validate the public key

  cat /sdcard/id_dsa-android.pub >>
  /data/data/com.teslacoilsw.quicksshd/home/.ssh/authorized_keys

Note: Validating means in this case to copy the pubkey to authorized_keys (it’s located in /data/data/com.teslacoilsw.quicksshd/home/.ssh)

4. Configure Go to your QuickSSHD settings and remove the checkbox Password and check Shared Keys (If you did right the key added to authorized_keys should be listed right under the checkbox.

5. Test

  ssh -i /.ssh/id_dsa-android -p 2222

If everything went fine you should get:

  Enter passphrase for key '/home/sven/.ssh/id_dsa-android'

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Chrooted SFTP accounts without shell access

WladyX — Thu, 24 Mar 2011 10:29:06 +0000

Create a user group, e.g. sftponly
Add users to that group
Add a corresponding Match directive to sshd‘s configuration in /etc/ssh/sshd_config:

Subsystem sftp internal-sftp

Match Group sftponly
        ChrootDirectory %h
        AllowTCPForwarding no
        X11Forwarding no
        ForceCommand internal-sftp

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Sshfs

WladyX — Wed, 26 Jan 2011 10:11:05 +0000

add user to fuse group
$ sshfs server:/path/ /media/path/

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pssh

WladyX — Mon, 24 Jan 2011 11:06:00 +0000

pssh provides parallel versions of the OpenSSH tools that are useful for controlling large numbers of machines simultaneously. It includes parallel versions of ssh, scp, and rsync, as well as a parallel kill command.

via

Colored motd

WladyX — Thu, 13 Jan 2011 11:51:12 +0000

[user@box]$ echo -en "\033[1;34m" > /etc/motd [user@box]$ echo "Text of your motd file....." >> /etc/motd [user@box]$ echo -en "\033[0m" >> /etc/motd

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