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Have I found a bug in bash?
I have created a folder named Test
cd Test/
rm -rf ../Test (Deleted the PWD while I was in that directory, as shown in image)
Not a bug, not related to bash either. You're current working directory (and all the environment variables that hold the path info in your shell) is simply pointing to a filesystem node that's been orphaned. Listing it will give you what's in the node, which is nothing because . and .. are gone (because it's orphaned). Note that rm removes everything in the directory before orphaning the node. Thus, ls gives you nothing.
Also note that when you try to create a file while inside the deleted directory with something like touch blah or mkdir blah, it'll give you a file not found error.
"orphaned" may not be the correct term, I'm simply using it to mean that it has no parent node.
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Closed 3 years ago.
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If I need to change to some directory several levels up, I usually do this in bash:
cd ../../../../some/other/folder
Since it is quite annoying to type all those periods and slashes, I was wondering if there is some shorter way to type it; like for example:
cd ..4/some/other/folder
I have not been able to find it so far from for example cd --help.
There's no standard way.
You can declare a function that takes a number of parent directories as the first argument, and the relative path as the second one:
cdu () {
local n=$1
local p=""
while ((n--)) ; do
p+=../
done
cd "$p/$2"
}
You can then shorten cd ../../../bin to cdu 3 bin
What I use is
alias ..='cd ..'
alias ...='cd ../..'
To get 6 levels up, I just type ... + Enter three times.
according to cd man page, the immediate answer is "no".
if it helps, you may add the following to your .bashrc:
export prev1=".."
export prev2="../.."
export prev3="../../.."
export prev4="../../../.."
and so on.
example:
export prev4="../../../.."
mkdir -p /1/2/3/4/5
cd /1/2/3/4/5
pwd => result is /1/2/3/4/5
cd $prev4
pwd => result is /1
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Closed 7 years ago.
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I am not sure when this behavior started but by typing the ls command, I am getting the following output:
$ls
./ ../ .DS_Store Books/
I am not very sure about the first three items and they always come in every folder. Can anyone explain me how to get rid of them? I am using OS X Yosemite
The first two: ./ and ../ are current directory and parent directory respectively. You can't get rid of them. The last one .DS_Store is probably some config file/directory which you can remove with:
rm -f .DS_Store # use -r if it's a directory
But be sure to check what's its for!
The bahaviour of ls is not the reason for the "extra" output. You probably have an alias something like:
alias ls='ls -a'
in your shell. To find out exactly what it's aliased to, do:
type ls
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There is a file in my home directory that is called #snake#. I want to remove it but none of the regular remove commands will work. How can this "file" be removed without causing any damage, and what type of file is it?
It's an autosave file, it's there in case your computer crashes. You can delete these from emacs quite conveniently. Open up dired (C-x d) and press # to select all of them in the directory. Then x for delete.
Alternatively in a shell, just put the name in quotes, e.g. rm "#snake#"
The "problem" is that the # sign is interpreted as the start of a comment in a shell. Try enclose the file name in quotes, like:
rm "#snake#"
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I'd like to create the directory "Dir (A/B)" in "test" folder in one go with the following command:
$ mkdir -vp "test/dir (A/B)"
test
test/dir (A
test/dir (A/B)
Unfortunately it's creating 'dir (A' in 'test'.
I've tried to escape it, but without success e.g. mkdir -vp "test/dir (A\/B)".
When creating manually in Finder, it works.
How should I escape the arguments? Thanks.
I'm using bash shell.
Do:
$ mkdir -vp "test/dir (A:B)"
The directory will appear as dir (A/B) in Finder and file open dialogs, but dir (A:B) in shell and other Unix applications.
Note that this is very Mac-specific, it won't work on other flavors of Unix.
Although i would not recommend this, you can create a filename like this:
mkdir 'test:dir (A:B)'
# when creating missing folders
mkdir -pv 'test/dir (A:B)'
In the finder it will show as: "test/dir (A/B)"
but if you look in the bash shell (ls -al), you will see "test:dir (A:B)"
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Closed 11 years ago.
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the name.sh already save in C:\Documents and Settings\user, i type sh name.sh
sh: testing.sh: No such file or directory
any help will be appreciated!
You can just type ./name.sh and your script should run.
If your current directory is not in your $PATH, adding the ./ tells the shell to look there.
The other possibility is that you're not currently in the right directory. If the result of pwd shows you are not in C:\Documents and Settings\user, then you will need to cd to that directory, or move the script to whatever directory you are in.
Add ./ in front of the name. ./name.sh