Monday, September 28, 2015

FILESYSTEM Q & A PAGE - 1

FILESYSTEM  INTERVIEW QUESTIONS AND ANSWERS
PAGE - 1
1..What you mean  by linux  filesystem?
The file system is divided into many parts; the  filesystem with /bin , /lib ,
/etc , /dev , and a few others; a /usr file system with programs and unchanging data; /var filesystem with changing data ; and a /home for everyone's personal files. Depending on the hardware configuration and the decisions of the system administrator, the division can be different; it can even be all in one filesystem.


2..What  are the different  linux file systems?

Ext4
Ext3
Vfat

3..Compare ext4, ext3?

Ext4
Ext4 stands for fourth extended file system.
Starting from Linux Kernel 2.6.19 ext4 was available.
Supports huge individual file size and overall file system size.
Maximum individual file size can be from 16 GB to 16 TB

Ext3
Ext3 stands for third extended file system.
Starting from Linux Kernel 2.4.15 ext3 was available.
The main benefit of ext3 is that it allows journaling.
Maximum individual file size can be from 16 GB to 2 TB

4..How we can convert  ext3 to ext4 filesystem?

tune2fs -O extents,uninit_bg,dir_index /dev/dev-name


5..How to identified the files accessed  within 25 days?

#  find  /  -type f  -atime  -25  >  file_name.files

 6..How to make the permanent changes  in  the proc  directory?

sysctl –p

7..How to find out which file system running  on your linux server currently?

df
8..What is  the file system for CD-ROM?
Isofs
9..During  the boot  time   which file system automatically mounted ?
/etc/fstab
10..During the mount time which command  used mount file system read   to only?
mount –r

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