I'm trying to generate a key for my computer, but I notice that when I try running the command that I see on GitHub.com, nothing happens, and I only get a prompt. I'm wondering what could be happening? Advice is appreciated, thanks!
I tried searching up how to generate an SSH key, and it seems that I'm supposed to be getting a different output. I tried going into different directories but got the same issue.
Edit: Adding text output, since I can't seem to produce an image.
[username]$ ssh-keygen -t ed25519 -C “[Github email]"
(Output): ">"
One of your quote symbols is the wrong type of quote symbol - specifically, it's U+201C LEFT DOUBLE QUOTATION MARK. Re-type the command - it was probably messed up by copying it from somewhere.
If your shell prompts you with a >, that means you are not done entering your command yet. Try typing something simple like
echo "test
Bash will display a > and wait for you to finish the command. In this case it's because you've opened a quote (the last character in your command) and not yet closed it.
Related
I connect to remote host in VSCode. Then let' say I type the following command in VSCode terminal
sh ./environment/activate_python_jupyter.sh
and then I realize that I should use the pyspark one instead of the python one, so I use up arrow to find the above command, and use left/right arrows to locate my cursor to modify thon to spark. The modified command looks like this before I hit enter
sh ./environment/activate_pyspark_jupyter.sh
However, after I hit the enter I find out that the modified command is not the one I see before (checked by up arrow), it might be something like this
sh ./environment/actispark_python_jupyter.sh
I try several times and each time the modified command looks good/turns to a different and wrong one before/after I hit enter. I finally realize that it is because the cursor was actually not located in the right place when I modified the command, although it looked good before I hit enter.
More interestingly, my cursor can go beyond the $ (dollar sign) when I use up arrow to find a command and move the cursor using the left arrow.
This looks like a cursor location bug. Have someone met with such issue and happen to know a solution?
It's nice to run M-x man foo for command foo within Emacs. It's then possible to navigate easily within the man page and to find details quickly.
When the help of a command (such as git) produces limited output, one can just use a terminal instead of emacs.
But occasionally, a command (such as aws help—run in a terminal) produces extensive output. Yet the output is not compatible with the emacs Man mode. An option is to use M-x shell within emacs, but that will not display the page at once. It will report "WARNING: terminal is not fully functional" and require pressing a key endlessly until the complete help appears, or, for Emacs 25, "Could not find executable named 'groff'".
What is a good way to read long manual pages produced by commands within emacs?
I just ran into this exact problem a few days ago.
Type escape + ! then type (for example) “aws ec2 help”. This brings the help text into a new buffer called Shell Command Output, with all of the control-h characters, etc.
Switch to the new buffer with control-x then lowercase ‘o’ (for other buffer)
Type escape + lowercase ‘x’ to run an emacs function, then type ‘man’ and hit Enter. It will prompt for man page entry and default to EC2, just hit Enter. In my case, it displays an error in the status line, “error in process sentinel: Can’t find the EC2 manpage”.
However, the “man page” functions are now available, so now (in that buffer)you can type escape + x and run the function Man-fontify-manpage. The page should now look like a nice man page with bold, etc.
You can then rename the buffer (escape + x then something like ec2) so the buffer isn’t replaced if you run another shell command.
I you just want the output in a buffer, you can simply use:
M-! aws help RET
If you want the output in a shell buffer, you can do git help commit | cat (so no more "terminal is not fully functional").
Probably you can do M-! aws help | cat RET also. I do not have aws, but hopefully the piping will remove the escape characters if aws output formatting is done right. You should try also TERM=dumb aws help. Any command should know better than using fancy output when TERM is set to dumb. If aws is dumb that way itself, you could pipe its output to something that filters out control characters -- try this
For forcing man mode in an arbitrary buffer, M-x Man-mode (yes, uppercase). I am not sure if that will play nice with aws's output.
By the way, for git I suppose you know you can do man git-commit (or man git-any_git_command, in general), so you have a nice alternative to git help when using emacs (output of help and man page is the same).
Ok I'm having trouble and google isn't helping, so I thought I'd come to you geniuses. I'm using Powershell and posh-git, and it keeps doing something that I'm sure I can exit out of with a magic command, I just don't know it yet.
Basically, when I run git diff (or something else with a long result), it will only give me a screen's worth of information, and end the screen with a colon
:
And if I keep pressing Enter it will add more to the screen til it is done showing everything for that command, and shows
<END>
But now what? How do I get out of this and back to calling commands? Enter, Esc and the other things I thought to try are not helping. I'm sure this must be a simple thing, but I don't know how to explain to Google what I want.
Anyone know?
if you do a git config -l you may see some relevant entries like:
core.pager='less'
pager.diff=false
pager.log=true
You can enable or disable the pager for different commands, or set a different pager. https://www.kernel.org/pub/software/scm/git/docs/git-config.html has the details, check out the core.pager section and pager.<cmd> sections for specifics.
If you're using 'less' as your pager, hit 'h' at that : prompt to get lots of details about what you can do there, and as pointed out by others, q, Q, or ZZ will get you back to the command line.
You can terminate the current command using CTRL+C. Is that what you're asking?
I'm trying to execute this line:
cd /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148)/Symbols
but this error pop out:
-bash: syntax error near unexpected token `('
How do I resolve this?
You need to either escape the space and both the opening and closing parens with a backslash like this:
cd /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1\ \(8C148\)/Symbols
or quote the path like this:
cd "/Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148)/Symbols"
Escaping and quoting seems tedious and annoying, you might say? Rest assured, there is a better way. Power users generally rely on tab completion and don't really think about escaping paths on the command line too much. Try typing the first part of a directory or filename and hit the tab key. You'll see the shell auto-complete as much of the text as possible. If there is still more to type, hit the tab key again and you'll be presented with a list of possible matches based on what you've typed so far. Type more characters to disambiguate and try hitting tab again. Rinse and repeat as necessary. Tab completion will do the escaping for you along the way.
cd /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1\ \(8C148\)/Symbols
In Matlab, there is a very nice feature that I like. Suppose I typed the command very-long-command and then a few several commands afterwards. Then later if I need the long command again, I just type very and press the up arrow key, my long command appears. It finds the last command that starts with very. I couldn't do the same in unix command line, when I try to do it, it disregards whatever I typed, and goes back to the last commands in chronological order. Is there a way to do it?
In bash this functionality is provided by the commands history-search-forward and history-search-backward, which by default are not bound to any keys (see here). If you run
bind '"\e[A":history-search-backward'
bind '"\e[B":history-search-forward'
it will make up-arrow and down-arrow search backward and forward through the history for the string of characters between the start of the current line and the point. See also this related Stack Overflow question.
In bash, hitting ctrl-r will let you do a history search:
$ echo 'something very long'
something very long
$ # blah
$ # many commands later...
(reverse-i-search)`ec': echo 'something very long'
In the above snippet, I hit ctrl-r on the next line after # many commands later..., and then typed ec which brought me back to the echo command. At that point hitting Enter will execute the command.
You can do the same thing by using "!". For example:
$ echo "Hello"
Hello
$ !echo
echo "Hello"
Hello
However, it is generally a bad idea to do this sort of thing (what if the last command did something destructive?). If you expect you will reuse something, then I suggest you create a shell script and save it away somewhere (whenever I plan to reuse something, I create a script in ~/.local/bin).