Why bash-4.2$?

lmohammeed · 07-09-2014, 09:41 PM

Dear respected users,

A problem that I encounter before. I think I did something wrong. My terminal suddenly turn to bash-4.2$. Almost all my folders are now empty.
I need your help please.

Kind regards
Lawal

evo2 · 07-09-2014, 09:43 PM

Hi,

a couple of things to check:
- Are you logged in as a different user (or a different machine)?
- Did you delete your home directory?
- Is /home mounted?

Evo2.

lmohammeed · 07-09-2014, 10:20 PM

Dear evo2,
Thank you.

-No, I didn't log as a different user.
-I suspect that I deleted my home directory. When I run in root

Code:

who am I

, I got

PHP Code:



mohammed pts/0..

.
-Home is mounted only in root

Code:

cd /home

I got

Code:

root@mohammed home

. However, all folders are empty.

Kind regards
Lawal

btmiller · 07-09-2014, 10:45 PM

The terminal string is set by the PS1 environment variable, which is usually populated by one of the shell start up scripts. The fact that it has not been set indicates that the normal start up scripts did not run correctly, possibly because they no longer exist.Do you remember what you were doing when this problem first occurred? Have you received any messages from Linux or from your BIOS indicating a potential hard disk problem? Any warning or error messages about mounting certain partitions on boot?

Can yiou please post the output of the following commands:

Code:

fdisk -l
cat /etc/fstab
mount
df -h

These will allow us to see what partitions are mounted and the state your hard drive is in.

evo2 · 07-09-2014, 11:42 PM

Hi,

Quote:

Originally Posted by lmohammeed

-No, I didn't log as a different user.

ok.

Quote:

Originally Posted by lmohammeed

-Home is mounted only in root

Code:

cd /home

I got

Code:

root@mohammed home

. However, all folders are empty.

Just because /home exists doesn't mean it is mounted. Do you have a separated home partition that is not mounted?

To help us understand please post the output of the commands given in btmiller's post, along with

Code:

ls -l /home/

Evo2.

lmohammeed · 07-10-2014, 12:01 AM

Dear btmiller,

Yes, I remember, I was running a program called wien2k in root, then instead of deleting a newly created directory, I did a mistake by deleting the home directory.

Code:

fdisk -l

PHP Code:



WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. 
 
 
Disk /dev/sda: 750.2 GB, 750156374016 bytes 
255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors 
Units = sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 4096 bytes 
I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
Disk identifier: 0x00000000 
 
   Device Boot      Start         End      Blocks   Id  System 
/dev/sda1               1  1465149167   732574583+  ee  GPT 
Partition 1 does not start on physical sector boundary. 
 
Disk /dev/mapper/vg_mohammed-lv_swap: 10.4 GB, 10435428352 bytes 
255 heads, 63 sectors/track, 1268 cylinders, total 20381696 sectors 
Units = sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 4096 bytes 
I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
Disk identifier: 0x00000000 
 
Disk /dev/mapper/vg_mohammed-lv_swap doesn't contain a valid partition table 
 
Disk /dev/mapper/vg_mohammed-lv_root: 53.7 GB, 53687091200 bytes 
255 heads, 63 sectors/track, 6527 cylinders, total 104857600 sectors 
Units = sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 4096 bytes 
I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
Disk identifier: 0x00000000 
 
Disk /dev/mapper/vg_mohammed-lv_root doesn't contain a valid partition table 
 
Disk /dev/mapper/vg_mohammed-lv_home: 685.5 GB, 685483491328 bytes 
255 heads, 63 sectors/track, 83338 cylinders, total 1338834944 sectors 
Units = sectors of 1 * 512 = 512 bytes 
Sector size (logical/physical): 512 bytes / 4096 bytes 
I/O size (minimum/optimal): 4096 bytes / 4096 bytes 
Disk identifier: 0x00000000 
 
Disk /dev/mapper/vg_mohammed-lv_home doesn't contain a valid partition table

Code:

cat /etc/fstab

PHP Code:



# /etc/fstab 
# Created by anaconda on Mon Jul  1 22:44:04 2013 
# 
# Accessible filesystems, by reference, are maintained under '/dev/disk' 
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info 
# 
/dev/mapper/vg_mohammed-lv_root /                       ext4    defaults        1 1 
UUID=ab72f7a2-7a91-455c-bd56-34904e00c04e /boot                   ext4    defaults        1 2 
/dev/mapper/vg_mohammed-lv_home /home                   ext4    defaults        1 2 
/dev/mapper/vg_mohammed-lv_swap swap                    swap    defaults        0 0

Code:

mount

PHP Code:



proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) 
sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) 
devtmpfs on /dev type devtmpfs (rw,nosuid,size=4028244k,nr_inodes=1007061,mode=755) 
devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) 
tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) 
tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755) 
/dev/mapper/vg_mohammed-lv_root on / type ext4 (rw,relatime,data=ordered) 
tmpfs on /sys/fs/cgroup type tmpfs (rw,nosuid,nodev,noexec,mode=755) 
cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,release_agent=/lib/systemd/systemd-cgroups-agent,name=systemd) 
cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset) 
cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu) 
cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory) 
cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices) 
cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer) 
cgroup on /sys/fs/cgroup/net_cls type cgroup (rw,nosuid,nodev,noexec,relatime,net_cls) 
cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio) 
cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event) 
systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=24,pgrp=1,timeout=300,minproto=5,maxproto=5,direct) 
hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime) 
debugfs on /sys/kernel/debug type debugfs (rw,relatime) 
tmpfs on /media type tmpfs (rw,nosuid,nodev,noexec,relatime,mode=755) 
configfs on /sys/kernel/config type configfs (rw,relatime) 
securityfs on /sys/kernel/security type securityfs (rw,relatime) 
mqueue on /dev/mqueue type mqueue (rw,relatime) 
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw,relatime) 
/dev/sda2 on /boot type ext4 (rw,relatime,stripe=4,data=ordered) 
/dev/mapper/vg_mohammed-lv_home on /home type ext4 (rw,relatime,data=ordered)

Code:

df -h

PHP Code:



Filesystem                       Size  Used Avail Use% Mounted on 
devtmpfs                         3.9G     0  3.9G   0% /dev 
tmpfs                            3.9G  1.4M  3.9G   1% /dev/shm 
tmpfs                            3.9G  784K  3.9G   1% /run 
/dev/mapper/vg_mohammed-lv_root   50G  5.5G   44G  12% / 
tmpfs                            3.9G     0  3.9G   0% /sys/fs/cgroup 
tmpfs                            3.9G     0  3.9G   0% /media 
/dev/sda2                        485M   62M  399M  14% /boot 
/dev/mapper/vg_mohammed-lv_home  629G  222M  597G   1% /home

Kind regards
Lawal

evo2 · 07-10-2014, 12:04 AM

Hi,

ok /home is a separate partition (under lvm) and it is mounted.
Can you please do the ls and a stat for good measure? Eg

Code:

ls -al /home
stat /home

Evo2.

lmohammeed · 07-10-2014, 12:41 AM

Hi,
Thanks

Code:

ls -al /home

PHP Code:



total 12 
drwxr-xr-x.  3 root     root     4096 Jul  9 20:07 . 
dr-xr-xr-x. 24 root     root     4096 Jul  9 20:18 .. 
drwx------. 18 mohammed mohammed 4096 Jul  9 20:19 mohammed

Code:

stat /home

PHP Code:



File: `/home' 
  Size: 4096            Blocks: 8          IO Block: 4096   directory 
Device: fd02h/64770d    Inode: 2           Links: 3 
Access: (0755/drwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) 
Access: 2014-07-09 20:09:11.218683049 +0800 
Modify: 2014-07-09 20:07:37.258597949 +0800 
Change: 2014-07-09 20:07:37.258597949 +0800 
 Birth: -

Kind regards
Lawal

evo2 · 07-10-2014, 01:11 AM

Hi,

Quote:

Originally Posted by lmohammeed

Code:

ls -al /home
total 12
drwxr-xr-x.  3 root     root     4096 Jul  9 20:07 .
dr-xr-xr-x. 24 root     root     4096 Jul  9 20:18 ..
drwx------. 18 mohammed mohammed 4096 Jul  9 20:19 mohammed

So it looks like your home directory exists. But it does not contain the files you expect?
But there is no l/home/lost+found directory as I would expect for a mounted ext4 file system. I wonder if you have mounted your home partition on a non-empty /home directory. Can you unmount /home and see if there is anything in /home ? You'll need to drop (or boot) to single user mode.

Evo2.

lmohammeed · 07-10-2014, 01:22 AM

Hi,
Thanks

Code:

unmount /home

PHP Code:



bash: unmount: command not found

Kind regards
Lawal

evo2 · 07-10-2014, 01:44 AM

Hi,

the command is umount.

Evo2.

lmohammeed · 07-10-2014, 02:02 AM

Hi,

Sorry

Code:

umount

PHP Code:



Usage: umount -h | -V 
       umount -a [-d] [-f] [-r] [-n] [-v] [-t vfstypes] [-O opts] 
       umount [-d] [-f] [-r] [-n] [-v] special | node...

Kind regards
Lawal

evo2 · 07-10-2014, 02:12 AM

Hi,

yes, it needs the mount point as an argument...

Code:

umount /home

Evo2.

lmohammeed · 07-10-2014, 02:21 AM

oops!

Code:

umount /home

PHP Code:



umount: /home: device is busy. 
        (In some cases useful info about processes that use 
         the device is found by lsof(8) or fuser(1))

Kind regards
Lawal

evo2 · 07-10-2014, 02:36 AM

Hi,

you need to go to single user mode like I said in post #9.

Evo2.