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analyze traffic remotely over ssh w/ wireshark
When using tcpdump, specify -U option to prevent buffering and -iany to see all interfaces.
Create a secure tunnelled connection for access to a remote MySQL database.
For example, connect with MySQL Workbench to email@example.com:13306.
Neat idea! This variation works on FreeBSD.
Shorter, easier to remember version of cmd#7636
NTP is better, but there are situations where it can't be used. In those cases, you can do this to sync the local time to a server.
If you have a lot of hosts in /etc/hosts this would be very useful. Anyone have any more concise examples?
SSH can be controlled trough an ~ escape sequence. Example, to terminate the current ssh connection, type a newline, then the ~ character, and last a . character.
This is useful eg when an ssh connection hangs after you reboot a machine and the connection hangs.
If you need to xdebug a remote php application, which is behind a firewall, and you have an ssh daemon running on that machine. you can redirect port 9000 on that machine over to your local machine from which you run your xdebug client (I am using phpStorm)
So, run this command on your local machine and start your local xdebug client, to start debugging.
Booting the VM headless via VBoxHeadless requires knowledge of the VM's network in order to connect. Using VBoxManage in this way and you can SSH to the VM without first looking up the current IP, which changes depending on how you have your VM configured.
This uses ssh to transfer the contents of one Mac's clipboard to another's. This only works with plain text, sadly. Trying to transfer images will just clear out the remote machine's clipboard, and rich text will be converted to plain text. Using the "Remote Login" must be enabled on the remote machine (via System Preferences' Sharing panel) for this to work.
This version compresses the data for transport.
In the example above 3 tables are copied. You can change the number of tables. You should be able to come up with variants of the command by modifying the mysqldump part easily, to copy some part of remote mysql DB.
This may be listed already but this command is useful to untar a specific directory to a different server.
If you are stuck behind a firewall and want to synchronize time with another server but you do not want to port forward NTP (which uses UDP) then this command is handy. It gets the time from a server and sets the local time. It is not that accurate but I can live with a second or so drift.
Run local scripts on remote server. "-T Disable pseudo-tty allocation"
1. SSH into a machine
2. Tunnels VNC port to your local computer ("-L 5900:localhost:5900")
3. Runs a single use vnc server ("x11vnc -safer -localhost -nopw -once -display :0")
4. Goes into the background ("-f")
5. Runs VNC viewer on the local computer connecting to the remote machine via the newly created SSH tunnel ("vinagre localhost:5900")
Will return the SSH server key information for each host you have in your ~/.ssh/known_hosts file, including key size, key fingerprint, key IP address or domain name, and key type.
This command will copy command's output into your local clipboard
- port 8080 on localhost will be a SOCKSv5 proxy
- at localhost:localport1 you will be connected to the external source server1:remoteport1 and at bind_address2:localport2 to server2:remoteport2
- you will be using only IPv4 and arcfour/blowfish-cbc, in order to speed up the tunnel
- if you lose the connection, autossh will resume it at soon as possible
- the tunnel is here a background process, wiithout any terminal window open
When debugging an ssh connection either to optimize your settings ie compression, ciphers, or more commonly for debugging an issue connecting, this alias comes in real handy as it's not easy to remember the '-o LogLevel=DEBUG3' argument, which adds a boost of debugging info not available with -vvv alone.
Especially useful are the FD info, and the setup negotiation to create a cleaner, faster connection.
When using tcpdump, specify -U option to prevent buffering.