how to get directory path and name, file path and name from inode
/, /usr/, /var are different physical filesystems. Is it why inode number can be the same across them?...
The reason I am asking all these questions is that I want to find out if there is a way, through inode number (inode.st_ino), I can fnd out file directory path, and file name, or directory path and directory name? Any system functions that I can call to find out? Thank s a lot.
Last edited by zazzybob; 05-22-2005 at 11:54 AM..
Reason: code tags again ;-)
as kernel keeps track of user activities on a file by its INODE number and I node table .
what is the structure of Inode table. and where does this Inode table mapped into?user space or kernel space?
is the Inode Number is fixed for a file till its deletion?
thanks (1 Reply)
Hi all
when I execute pmap command on one of my daemon process, I am able to see the following output.
Address Kbytes RSS Anon Locked Mode Mapped File
00010000 40 40 - - r-x-- irs026bmd
00028000 56 56 16 - rwx-- irs026bmd
00036000... (3 Replies)
How we can know number of inode present in my Disk including free and occupied.
Is there any tool or program to know how much free inode are there in inode free list . (2 Replies)
How to get the filename of which has been deleted if I know the inode number.
i can use the command "istat" to get the inode number of the file.
# istat
/proc//fd/x
If this file has been deleted,but the process of this file has not been closed and handle has not been released ,so this... (3 Replies)
Hi all,
I am struggling to change the content of a file without changing the inode number. The exact issue is as below.
I have a file name test.bak which has 100 lines of text.
I am trying to to delete the first 90 lines of the text in the file.
I know that using sed/awk/head/tail I can... (3 Replies)
I try to understand the meaning of an inode. I wonder whether
an inode is unique (I'm pretty sure it is) and
whether it remains the same inode regardless of whatever happens to the file, dir or whatever?
I read somewhere that an inode stores info about the file, size... so changing the... (4 Replies)
Hi,
I have created a file abc.log in Redhat Linux.
Inode number for a file get changes every time i update the file using vi editor.
Is there any setting that can be made , such that inode number never gets changed?
Or if we cannot restrict from inode number getting changed , is... (9 Replies)
Hi,
I have created a file a.txt in Redhat Linux.
Inode number for a file changes every time i update the file using vi editor , gedit etc.
Is there any setting that can be made , such that inode number never changes as that is supposed to be the expected behavior?
Or if we cannot... (13 Replies)
I have a directory of files, I can show the number of lines in each file and order them from lowest to highest with:
wc -l *|sort
15263 Image.txt
16401 reference.txt
40459 richtexteditor.txt
How can I also print the number of unique lines in each file?
15263 1401 Image.txt
16401... (15 Replies)
Discussion started by: spacegoose
15 Replies
LEARN ABOUT CENTOS
vfstab
vfstab(4) File Formats vfstab(4)NAME
vfstab - table of file system defaults
DESCRIPTION
The file /etc/vfstab describes defaults for each file system. The information is stored in a table with the following column headings:
device device mount FS fsck mount mount
to mount to fsck point type pass at boot options
The fields in the table are space-separated and show the resource name (device to mount), the raw device to fsck (device to fsck), the
default mount directory (mount point), the name of the file system type (FS type), the number used by fsck to decide whether to check the
file system automatically (fsck pass), whether the file system should be mounted automatically by mountall (mount at boot), and the file
system mount options (mount options). (See respective mount file system man page below in SEE ALSO for mount options.) A '-' is used to
indicate no entry in a field. This may be used when a field does not apply to the resource being mounted.
The getvfsent(3C) family of routines is used to read and write to /etc/vfstab.
/etc/vfstab can be used to specify swap areas. An entry so specified, (which can be a file or a device), will automatically be added as a
swap area by the /sbin/swapadd script when the system boots. To specify a swap area, the device-to-mount field contains the name of the
swap file or device, the FS-type is "swap", mount-at-boot is "no" and all other fields have no entry.
EXAMPLES
The following are vfstab entries for various file system types supported in the Solaris operating environment.
Example 1: NFS and UFS Mounts
The following entry invokes NFS to automatically mount the directory /usr/local of the server example1 on the client's /usr/local directory
with read-only permission:
example1:/usr/local - /usr/local nfs - yes ro
The following example assumes a small departmental mail setup, in which clients mount /var/mail from a server mailsvr. The following entry
would be listed in each client's vfstab:
mailsvr:/var/mail - /var/mail nfs - yes intr,bg
The following is an example for a UFS file system in which logging is enabled:
/dev/dsk/c2t10d0s0 /dev/rdsk/c2t10d0s0 /export/local ufs 3 yes logging
See mount_nfs(1M) for a description of NFS mount options and mount_ufs(1M) for a description of UFS options.
Example 2: pcfs Mounts
The following example mounts a pcfs file system on a fixed hard disk on an x86 machine:
/dev/dsk/c1t2d0p0:c - /win98 pcfs - yes -
The example below mounts a Jaz drive on a SPARC machine. Normally, the volume management daemon (see vold(1M)) handles mounting of remov-
able media, obviating a vfstab entry. If you choose to specify a device that supports removable media in vfstab, be sure to set the mount-
at-boot field to no, as below. Such an entry presumes you are not running vold.
/dev/dsk/c1t2d0s2:c - /jaz pcfs - no -
For removable media on a SPARC machine, the convention for the slice portion of the disk identifier is to specify s2, which stands for the
entire medium.
For pcfs file systems on x86 machines, note that the disk identifier uses a p (p0) and a logical drive (c, in the /win98 example above) for
a pcfs logical drive. See mount_pcfs(1M) for syntax for pcfs logical drives and for pcfs-specific mount options.
Example 3: CacheFS Mount
Below is an example for a CacheFS file system. Because of the length of this entry and the fact that vfstab entries cannot be continued to
a second line, the vfstab fields are presented here in a vertical format. In re-creating such an entry in your own vfstab, you would enter
values as you would for any vfstab entry, on a single line.
device to mount: svr1:/export/abc
device to fsck: /usr/abc
mount point: /opt/cache
FS type: cachefs
fsck pass: 7
mount at boot: yes
mount options:
local-access,bg,nosuid,demandconst,backfstype=nfs,cachedir=/opt/cache
See mount_cachefs(1M) for CacheFS-specific mount options.
Example 4: Loopback File System Mount
The following is an example of mounting a loopback (lofs) file system:
/export/test - /opt/test lofs - yes -
See lofs(7FS) for an overview of the loopback file system.
SEE ALSO fsck(1M), mount(1M), mount_cachefs(1M), mount_hsfs(1M), mount_nfs(1M), mount_tmpfs(1M), mount_ufs(1M), swap(1M), getvfsent(3C)
System Administration Guide: Basic Administration
SunOS 5.10 21 Jun 2001 vfstab(4)