try using # strace df -h
If strace not installed , then run # yum install strace* --enablerepo=*
Tuesday, November 21, 2017
How to check mounted filesystems when df command hung in linux ?
In general df is the regular command to check mounted filesystems. other than that , command # mount is the option to check .
# mount
can compare with # mount vs # cat /etc/fstab
# mount
can compare with # mount vs # cat /etc/fstab
how to calculate load average in linux ?
load average: 0.00, 0.00, 0.00
load average gives 3 time intervals which are 1,5,15ms interval
As above load average last 1min load is 0% at last 5ms load is 0% and last 15ms load is 0%
load average gives 3 time intervals which are 1,5,15ms interval
As above load average last 1min load is 0% at last 5ms load is 0% and last 15ms load is 0%
uptime command in linux
load average: 0.00, 0.00, 0.00
load average gives 3 time intervals which are 1,5,15ms interval
As above load average last 1min load is 0% at last 5ms load is 0% and last 15ms load is 0%
load average gives 3 time intervals which are 1,5,15ms interval
As above load average last 1min load is 0% at last 5ms load is 0% and last 15ms load is 0%
df command hung in linux
what could be the reasons for df command hung ?
* NAS issue
- Try to see if your seeing any NFS stale erros with nas filesystems or NFS server may not responding
* High load
- could be due to high load , check with uptime command for high load. there could be chances of huge IO request on any filesystems , some hung commands like df ,ls,sshd ,defunct process
* I/O errors
- could be chances of IO errors with NAS and local disks.
how-to-check-which-causing-for-df command to hung ?
how-to-check-mounted-filesystems when df command hung
* NAS issue
- Try to see if your seeing any NFS stale erros with nas filesystems or NFS server may not responding
* High load
- could be due to high load , check with uptime command for high load. there could be chances of huge IO request on any filesystems , some hung commands like df ,ls,sshd ,defunct process
* I/O errors
- could be chances of IO errors with NAS and local disks.
how-to-check-which-causing-for-df command to hung ?
how-to-check-mounted-filesystems when df command hung
Thursday, November 16, 2017
How to fsck without root password ?
You can give a try change the password going to single user mode . and then do fsck at single user mode .
If its not going to single user mode due to inode issue or read only filesystem then give try to go shell prompt using " init=/bin/bash" option editing kernel at grub menu.
Refer below to go bash shell
How to get shell prompt in linux without root password ?
How to fsck a filesystem in linux ?
fsck -y /dev/mapper/<vgname>/<lvname>
for example :- fsck -y /dev/mapper/vglinux/lvvar
for example :- fsck -y /dev/mapper/vglinux/lvvar
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