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Suppose this directory layout
/dir0/
/dir0/file0
/dir0/dir1
/dir0/dir1/file1
/dir0/dir1/dir2/dir2
/dir0/dir1/dir2/file2
/dir0/dir1/dir2/dir3 [ -> /dir0/dir1 symlink ]
and you are inside dir3. Then ls .. yields file0 dir1 while cd ..; ls yields file2 dir3.
In what logic does this make any sense? Is this a bug?
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Closed 1 year ago.
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There was a directory structure on my linux server like this A/$b/
From my home directory executed a command
rm -rf A/$b.
After executing this command, The directory A itself was deleted.
Any idea what would have happened in the background?
A $ sign indicates the start of a variable in most shell languages.
If $b is not defined then your command would resolve as:
rm -rf A/
… which would delete the A directory.
To include the $ in the path you need to escape it:
rm -rf A/\$B
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Closed 2 years ago.
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what i do
$ cp /etc/libvirt/qemu/centos7.8.xml{,123.xml}
what happend
$ ls /etc/libvirt/qemu/
centos7.8.xml centos7.8.xml123.xml
but what i want is
$ ls /etc/libvirt/qemu/
centos7.8.xml 123.xml
i don't want to use the follow , write /etc/libvirt/qemu twice:
$ cp /etc/libvirt/qemu/centos7.8.xml /etc/libvirt/qemu/123.xml
and i know what {,_backup} mean.
any way?
like follow ? no such format
cp /etc/libvirt/qemu/centos7.8.xml{123.xml}
Using bash extension brace expansion you can do the following:
cp /etc/libvirt/qemu/{centos7.8.xml,123.xml}
or even:
cp /etc/libvirt/qemu/{centos7.8,123}.xml
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After running a bad command my computer generates folders that start with "--". When I run ls I get something like:
workspace
--workspace
I don't know how to delete these folders through the command line.
rm -r --workspace does not work. I only have access to this machine through CLI so I can't delete them using the gui.
My OS is Linux 18.04
You need to tell rm to stop parsing and use your arguments verbatim. You do this by passing a final -- argument before the file or folder name.
rm -r -- --workspace
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I want to change my folder emblems recursively. I know that the command gvfs-set-attribute -t string ~/Desktop/ metadata::emblems [] can change the emblem of only Desktop.
How can I change whole folders and the files emblems? I tried gvfs-set-attribute -t stringv ~/* metadata::emblems [] but it returns error Error setting attribute: Setting attribute /home/taygun/Desktop not supported.
You could feed the command into find:
find ~/ -type d -exec gvfs-set-attribute -t stringv {} metadata::emblems [] \;
There are some known issues with the defaultdir ~ on some distros with gvfs-set-attribute (https://bugzilla.redhat.com/show_bug.cgi?id=1368676)
Consider upgrading to the latest version if you're not already on it.
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I am currently backing up my system. If I use
> tar cvpzf backup.tgz --exclude=/proc --exclude=/lost+found--exclude=/backup.tgz --exclude=/mnt --exclude=/sys /
It says the system doesn't have enought space.
Right now, I have mount a usb in directory
~/mnt/sdc1
How do I tar the backup.tgz to this specific location?
You will want to do two things. First insure that your drive is mounted, Then just provide the complete path to your backup location. E.g.
mount | grep -q ~/mnt/sdc1 # or just grep -q sdc1 (if it is the only sdc1)
if [ $? -eq 0 ]; then
tar cvpzf ~/mnt/sdc1/backup.tgz ...
fi
note: the replace the ellipses with the rest of your tar command.