My /home directory is having very less memory. But some of my programs which are running in production will create dynamic files in '/home' directory.
The problem is if it reaches to 100% then my program doesn't work. So I have to manually go and delete the files or copy the files.
So rather than doing that I want to redirect the files from '/home' to '/tmp' directory in unix by default.
Please give me some thoughts.
You have at least two ways to do:
if you can config your program to export files to other dir, do this.
if you cannot do anything on the program, you can create a cron job, remove/cp those files automatically
If the program creates files under it's own directory, you can create a symlink:
# Create directory in /tmp
mkdir /tmp/myprog
# Set permissions
chown "${USER}:${USER}" /tmp/myprog
chmod -R o-x /tmp/myprog
# Create symlink at /home/myprog
ln -s /tmp/myprog "${HOME}/myprog"
Related
Im writing shell script to take backup of nagios (/usr/local/nagios) directory. I'm unable to compress it from my home directory because its a root folder. i cannot use sudo as it asks for password. Is there any better way to zip /ussr/local/ files without comprimising security?
Someone please help.
Thank you!
Do it in a cron job owned by root.
Create this script and save it as /etc/cron.daily/nagios-backup:
#!/bin/sh
cd /usr/local
tarball="/home/kart/nagios-$(date +%Y-%m-%d).tgz"
tar -pzcf "$tarball" nagios
chmod 400 "$tarball"
Make sure that script is executable (sudo chmod 755 /etc/cron.daily/nagios-backup) and it'll run every night, dumping that log to a dated tarball file in /home/kart. The tarball will not be readable to you without using sudo (since your account can't normally see the contents and you requested preserving security).
I am currently in /Desktop on my ubuntu system and I want to create a directory named vip inside /Documents/subd. Please not that Documents and Desktop are at same level. But the crux of this question is that I have to write a shell script such that it can create the requied directory from any directory of the system, no matter where it is situated.
I have tried concatenating $home with the required directory path!! But it is not working.
mkdir $home."/Documents/subd/vip"
I need to run this inside /Desktop or any other directory.
Please guide me!!
This should do the job:
mkdir "$HOME/Documents/subd/vip"
You just had some minor errors in your command.
Is there a way to chmod 777 the contents of a tarfile upon creation (or shortly thereafter) before distributing? The write permissions of the directory that's being tar'd is unknown at the time of tar'ing (but typically 555). I would like the unrolled dir to be world writable without the users who are unrolling the tar to have to remember to chmod -R 777 <untarred dir> before proceeding.
The clumsy way would be to make a copy of the directory, and then chmod -R 777 <copydir> but I was wondering if there was a better solution.
I'm on a Solaris 10 machine.
BACKGROUND:
The root directory is in our ClearCase vob with specific file permissions, recursively. A tarfile is created and distributed to multiple "customers" within our org. Most only need the read/execute permissions (and specifically DON'T want them writable), but one group in particular needs their copy to be recursively writable since they may edit these files, or even restore back to a "fresh" copy (i.e., in their original state as I gave them).
This group is somewhat technically challenged. Even though they have instructions on the "how-to's" of the tarfile, they always seem to forget (or get wrong) the setting of the files to be recursively writable once untarred. This leads to phone calls to me to diagnose a variety of problems where the root cause is that they forgot to do (or did incorrectly) the chmod'ing of the unrolled directory.
And before you ask, yes, I wrote them a script to untar/chmod (specific just for them), but... oh never mind.
So, I figured I'd create a separate, recursively-writable version of the tar to distribute just to them. As I said originally, I could always create a copy of the dir, make the copy recursively writable and then tar up the copy dir, but the dir is fairly large, and disk space is sometimes near full (it can vary greatly), so making a copy of the dir will not be feasable 100% of the time.
With GNU tar, use the --mode option when creating the archive, e.g.:
tar cf archive.tar --mode='a+rwX' *
But note that when the archive is extracted, the umask will be applied by default. So unless the user's umask is 000, then the permissions will be updated at that point. However, the umask can be ignored by using the -p (--preserve) option, e.g.:
tar xfp archive.tar
You can easily change the permissions on the files prior to your tar command, although I generally recommend people NEVER use 777 for anything except /tmp on a unix system, it's more productive to use 755 or worst case 775 for directories. That way you're not letting the world write to your directories, which is generally advisable.
Most unix users don't like to set the permissions recursively because it sets the execute bit on files that should not be executable (configuration files for instance) to avoid this they invented a new way to use chmod some time ago, called symbolic mode. Reading the man page on chmod should provide details, but you could try this:
cd $targetdir; chmod -R u+rwX,a+rX .; tar zcvf $destTarFile .
Where your $targetdir is the directory you are tarring up and $destTarFile is the name of the tar file you're creating.
When you untar that tar file, the permissions are attempted to be retained. Certain rules govern that process of course - the uid and gid of the owner will only be retained if root is doing the untaring, but otherwise, they are set to the efective uid and gid of the current process.
I am trying to move a file from one directory to other by command line.I used this command
raghul#raghul-Aspire-5750Z:~/temp/newfolder$ mv copy.txt /temp/
I got error like this
cannot create regular file '/temp': Permission denied
Can someone help me to figure this out? I need to move a file from one directory to other.
First of all you are using the copy command cp, not the move command mv.
Secondly you are trying to copy the file to a new file named /temp, ie. a file named temp in the / directory. This resides in the filesystem's root directory, which is mostly likely owned by root. Unless you have root permissions you can not write to the root directory.
Given that you are naming the file temp, I assume that you want to move the file to the /tmp directory, for which you will have permission to write to. Do this:
$ mv copy.txt /tmp
This will work only if you also have write permission on the file copy.txt because you need to be able to remove it. If you just wanted to copy the file, just read permission is required.
Otherwise, if you really do wish to move the file to a /temp directory, you can use sudo to do that, provided that you are set up as a sudo user:
$ sudo mv copy.txt /temp
[sudo] password for raghul
I just noticed that you're in a personal directory called ~/temp/newfolder. Is that the temp you're trying to move the file to: your personal one, in which onefolder is in? So you want to move the file up one directory?
Then the problem is that your command is missing the 'personal' tag ~. The command should be:
mv copy.txt ~/temp/
Try moving it with sudo command as it seems you don't have permission to move the file.
If you are requested for a password enter the root's password.
Try this:
sudo cp copy.txt /temp/
Try this: change /temp to
mv index.text temp
I'm trying to write a script that will let me add to an existing directory structure and copy a bunch of files into various places within this. However, using mkdir ... and cp... commands alone wont work since I do not have permission to do so. I understand that this can be changed manually in the 'Get Info' window, but this script will be run by others and its whole point is to save time and hassle.
Is there a way of adding to this script to give me permission to copy files to BASEDIR/SUBDIRS?
A bit more detail on what I'm doing:
I want to add to the directory BASEDIR with a bunch of SUBDIRS then copy files into these subdirectories. The problem is that I am receiving these 'permission denied' errors right after the mkdir BASEDIR/SUBDIR1/SUBDIR2 command.
Thanks
The command
sudo chmod -R ugo=rwx BASEDIR/
gives all folder permissions to all users to BASEDIR and all its subdirectories