Hi, I am using SLES 11 SP3 on an AWS EC2 instance. I have two different bash versions on two different servers.
In shell (GNU bash, version 4.2.47(1)-release (x86_64-suse-linux-gnu)), when I hit tab for autocompletion, the “$” is escaped after the variable name is completed, but if there is no completion then it just bells. E.g.
[FONT=Courier New]$ ls $JDK_H[/FONT]
results in
[FONT=Courier New]$ ls \$JDK_HOME (with a trailing space)[/FONT]
On an old GNU bash, version 3.2.51(1)-release (x86_64-suse-linux-gnu), it did not escape the “$” after completion which is what I would like.
How do I get the old behavior in the new bash? Am I missing some setup options. FWIW these are my shell options:
Out of curiosity, how did you get the newer bash on there? Is that
something you pulled from SUSE, or a version you added manually, or maybe
on another Linux distribution?
What happens if you start by using double-quotes before your ‘$’ symbol?
[color=blue]
ls "$JDK_H[/color]
On my bash 3.x system it still behaves properly, and I’m not sure if it
will help 4.x (which I do not have to test) but maybe it’ll help make
things more-clear for bash.
–
Good luck.
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how did you get the newer bash on there?
It came in a standard distro on EC2. I don’t think I did anything special to get that. Not applied any patches or anything.
What happens if you start by using double-quotes before your ‘$’ symbol?
I suppose in normal usage one wouldn’t want to do that. But I tried. It does not even expand the shell variable.
[FONT=Courier New]$ ls "$JD[/FONT]
just bells and does not become JDK_HOME
I also tried a few more things, hoping something would shed a light on it.
“shopt -s compat31” – did not complete at all.
“shopt -s compat32” – escapes the $
“sh” – the standard shell (4.2) worked fine, completing to “ls $JDK_HOME”
It this a bug?
This is what I get from uname:
[FONT=Courier New]$ uname -a
Linux ip-10-0-0-84.ec2.internal 3.12.44-52.10-default #1 SMP Wed Jul 15 22:18:05 UTC 2015 (a6f3717) x86_64 x86_64 x86_64 GNU/Linux
[/FONT]
Maybe it is worthwhile to post in the forum specific to EC2 instances, in
case something they are doing is really off. For what it is worth, the
kernel version I have from a SLES 11 SP4 box I built today is
3.0.101-63-default so that, at least, is very different. I’m not sure
what the SP3 kernel is these days, but I think it’s still in the 3.0.101
area, so I think yours is quite a bit off from what is expected. Amazon
may have done some tweaking.
–
Good luck.
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I doubt if this has anything to do with AWS, unless AWS is building the whole login / profile setup. I would also be curious is if this is a bug or a feature It is surely very frustrating.
This seems to afflict only “cd”. The . /etc/profile.d/bash_completion.sh is bracketed for bash 4.1 or greater. And there are a lot more complete options in this version compared to my older sles systems.
[FONT=Courier New]
$ cd $JD
becomes cd $JDK_HOME
$ echo $JD
becomes echo $JDK_HOME
$ ls $JD
becomes ls \$JDK_HOME
$ shopt -s
checkwinsize on
cmdhist on
expand_aliases on
extglob on
extquote on
force_fignore on
histappend on
interactive_comments on
login_shell on
progcomp on
promptvars on
sourcepath on
If you say so. I just patched my SLES 11 SP3 AWS system with all of the
latest patches and I am using this kernel:
Linux mybox #1 SMP Thu May 28 08:25:11 UTC 2015 (dc083ee) x86_64 x86_64
x86_64 GNU/Linux
Since that’s nothing at all like yours, I can only conclude that your box
is vastly different, and maybe not even SLES. Note: openSUSE != SLES.
Are you sure you are not using an openSUSE version of some sort, maybe
13.2 instead of SLES 11 SP3? That would explain how you have a bash 4.x
kernel, though my openSUSE laptop (this box) still does not behave like
your system does.
–
Good luck.
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Hi
That system is SLE 12… kernel is up to date, but not bash (4.2-75.2).
–
Cheers Malcolm °¿° LFCS, SUSE Knowledge Partner (Linux Counter #276890)
SUSE Linux Enterprise Desktop 12 GNOME 3.10.1 Kernel
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It is surely very frustrating.