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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘SSH’ Category

scp a remote file to a local machine

Posted by jpluimers on 2019/03/15

For me, scp is like tar; somehow I Google this every time…

  1. On the remote machine, find out the full path of the remote file:
    ~ # ssh username@192.168.71.123
    ...
    ~ # ls -alh `find /vmfs/volumes/ | grep -w W81Entx64CI | grep '\.vmdk$'`
    -rw-------    1 root     root      200.0G Aug 26 22:48 /vmfs/volumes/552f5788-33e30274-8dba-001f29022aed/VM/PSO/W81Entx64CI/W81Entx64CI-flat.vmdk
    -rw-------    1 root     root         500 Aug 19 16:36 /vmfs/volumes/552f5788-33e30274-8dba-001f29022aed/VM/PSO/W81Entx64CI/W81Entx64CI.vmdk
    
  2. On the local machine, go to the right directory, then copy the file from the remote machine:
    ~ # cd /vmfs/volumes/Samsung512NVME/PSO/VM/W81Entx64CI/
    ~ # time scp -v username@192.168.71.123:/vmfs/volumes/552f5788-33e30274-8dba-001f29022aed/PSO/W81Entx64CI/W81Entx64CI-flat.vmdk W81Entx64CI-flat.vmdk

 

I don't know what's worse--the fact that after 15 years of using tar I still can't keep the flags straight, or that after 15 years of technological advancement I'm still mucking with tar flags that were 15 years old when I started.

I don’t know what’s worse–the fact that after 15 years of using tar I still can’t keep the flags straight, or that after 15 years of technological advancement I’m still mucking with tar flags that were 15 years old when I started.

The last line will logon over ssh and shows the file transfer in a verbose way.

Requirements:

  • both machines have ssh
  • local machine has firewall entry to allow client ssh
  • remote machine has sshd and firewall entry to allow sshd server connections

Via [WayBackshell – How to scp a folder from remote to local? – Stack Overflow (thanks [WayBack] Gryphius)

Image source: [WayBackxkcd: tar

–jeroen

Posted in Communications Development, Development, Internet protocol suite, SSH, TCP | Leave a Comment »

Passwordless SSH

Posted by jpluimers on 2019/01/22

Note: if the system you SSH from is ever compromised, then assume the passwordless targets are also compromised!

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Linux, openSuSE, Power User, SSH, SuSE Linux, TCP, Tumbleweed | Leave a Comment »

How to Setup Chroot SFTP in Linux (Allow Only SFTP, not SSH)

Posted by jpluimers on 2018/12/24

If you want to setup an account on your system that will be used only to transfer files (and not to ssh to the system), you should setup SFTP Chroot Jail.

This explains how: [WayBack] How to Setup Chroot SFTP in Linux (Allow Only SFTP, not SSH)

Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, SFTP, SSH, TCP | Leave a Comment »

on my research list: autossh

Posted by jpluimers on 2018/12/12

Having mainly used ssh as a means to connect to a shell on remote machines and occasionally a manual port forward.

I never noticed autossh where you can automate the ssh logon process to keep permanent port forwards up and running. Cool!

It’s on my research list now, as this will be useful probably sooner than later:

My initial impression is that autossh is a wrapper around the regular ssh client that allows reconnection upon communication failures.

–jeroen

Posted in *nix, *nix-tools, Communications Development, Development, Internet protocol suite, Power User, SSH, TCP | Leave a Comment »

How to Setup Chroot SFTP in Linux (Allow Only SFTP, not SSH)

Posted by jpluimers on 2018/11/07

I need to script this one day: [WayBackHow to Setup Chroot SFTP in Linux (Allow Only SFTP, not SSH)

–jeroen

Posted in *nix, Awk, bash, Communications Development, Development, Internet protocol suite, Power User, Scripting, Software Development, SSH, TCP | Leave a Comment »

 
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