When the SSH daemon process associated with your connection decides that your connection is dead, it sends a hangup signal (SIGHUP) to the login shell. You can observe this with the pstree command. Every program you start normally at that point, no matter how many layers of shells deep, will ultimately "trace its ancestry" back to that shell. When you logged in, the SSH daemon allocated a pseudo-terminal for you and attached it to your user's configured login shell. What follows is a longer explanation that will help you understand how it actually works. It depends on how long it takes for the SSH daemon to decide that your connection is dead. They will get killed, but not necessarily immediately. The text below describes how things have traditionally worked in UNIX designspace for longer than Linux has existed. Those mechanisms are outside the scope of this question. The behavior can be changed by setting KillUserProcesses=no in /etc/systemd/nf, or circumvented using the systemd-specific mechanisms for starting a daemon in userspace. As of systemd v230, the new default is to kill all children of a terminating login session, regardless of what historically valid precautions were taken to prevent this. This Q&A predates the systemd v230 debacle. But if you have that knowledge and want something that, like iTerm2, can replace Terminal with more organization and customization features, ZOC Terminal is for you.Does getting disconnected from an SSH session kill your programs? Once again, we have an SSH client for Mac that requires a lot of knowledge of Terminal and command line to use. It also allows for F-Macro keys and customized button bars for commands. You can fully remap your keyboard inside ZOC Terminal to create hotkey shortcuts for certain command line functions and text inputs. ZOC Terminal also allows for a ton of customizing. So you can go back in a session as well or use the same commands over and over again as quickly as you need. You can easily scroll back through commands you’ve input in ZOC Terminal and see everything you’ve input in a session as well. It also maintains an “address book” of folders and hosts for you that are also color coded for quick access and maintenance of different servers. ZOC Terminal lets you open multiple Terminal tabs and color code them to remind yourself what you’re connected to and where. This is an emulator that is really great for staying organized when using and moving files around in SSH connections. With autocomplete code options (which work in SSH connections and in normal Terminal windows) and the ability to pull up the application with a hotkey, iTerm2’s features are incredible for making and utilizing SSH connections, and for completing Terminal functions in general.Īnother Terminal emulator that works incredibly well as an SSH Mac client is ZOC Terminal. And it lets you set up and quickly switch between profiles, so you can utilize different permission levels or quickly go to different SSH connections. ITerm2 also keeps track of which directories you visit most often on your SSH connections, so you can get into them again much faster. In terms of SSH, iTerm2 will keep you informed of which directory you’re in, and will let you navigate back to previous commands by hitting Shift + Cmd + Up or Shift + Cmd + Down. It also lets you go back and recover text you deleted or changed with an Instant Replay feature. It might make sense to just use Terminal rather than downloading a totally separate SSH client for the same basic functions.Ĭopying and pasting in iTerm2 is a lot easier than it is in PuTTY for Mac, and it keeps a paste history for you so you can quickly find the second-to-last item you copied. It’s also recommended to use Terminal to install PuTTY onto a Mac. Ultimately, though, PuTTY for Mac works much like Terminal in terms of operation and what actions it can perform. This saves a lot of time when logging in and switching between remote computers. You can also use PuTTY for Mac to save your SSH session information-the IP address and port number you’re logging into. The GUI has options for saving your SSH login information, so you don’t have to keep passwords written down everywhere to remember them. PuTTY for Mac has a graphical user interface (GUI) that you can log in with instead of using the Terminal windows. So PuTTY for Mac isn’t necessary to make an SSH connection or run command line on a Mac, but it does come with features that make it useful as an SSH client on Macs. Unlike Unix-based Macs, Windows doesn’t have Terminal built into it.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |