Sim Link Question

Does it make any difference where a simlink is performed? Will a simlink be global when done in root or /root? Will the simlink be recognized by all users when done in root or /root?

Thanks.


Similar Content



Added 'exit 0' To The Bottom Of .bashrc, Now What?

Centos 6.5

I ran into an interesting problem (on reddit) that I figured I could solve, but I have not been able to. Its simple,.. I added 'exit 0' to /root/.bashrc, and now I am trying to log in via ssh.

Everytime I do, it immediately exits when it runs the .bash_profile, which sources .bashrc, (which is immediate upon 'logging in')

I've tried:

Code:
ssh root@192.168.1.50 -t vim
vim scp://192.168.1.50/.bashrc
vim scp://192.168.1.50/root/.bashrc
ssh root@192.168.1.50 bash --norc
ssh root@192.168.1.50 /bin/bash --norc --noprofile
ssh -T root@192.168.1.50 "mv /root/.bashrc /root/.bashRC"
scp .bashrc root@192.168.1.50:/root/
ssh root@192.168.1.50 /bin/bash --norc --noprofile -vvvvvvvvvv
ssh -vvvvvv root@192.168.1.50 /bin/bash --norc --noprofile
ssh -vvvvvv root@192.168.1.50 /bin/mv /root/.bashrc /root/.bashRC
ssh -t -t root@192.168.1.50 << EOF
mv /root/.bashrc /root/.bashRC
EOF
ssh -t -t root@192.168.1.50 --norc << EOF
echo HELLO > /root/.bashrc
EOF
ssh -tv root@192.168.1.50 rm .bashrc

So,.. I am unable to get back into the system (as root, no other users exist) after adding 'exit 0' to .bashrc

Anyone feel like explaining why all of these failed (aside from saying SSH interactive logins run the .bash_profile/.bashrc files) or, offering a suggestion that works? Seems like if you have the root password, you should be allowed to modify the login process... since... you know... you are root.

Ln With -t Option, To Create Relative Symlink Not Working

I'm trying to recreate a relative symlink, to link "asymlink" to "somedir/actualfile" in /root/test/ but its creating 2 symlinks instead.

Code:
[root]# ln -t /root/test/ -s somedir/actualfile asymlink
[root]# ll /root/test/
total 4
lrwxrwxrwx 1 root root   18 Feb 16 06:15 actualfile -> somedir/actualfile
lrwxrwxrwx 1 root root    8 Feb 16 06:15 asymlink -> asymlink
drwxr-xr-x 2 root root 4096 Feb 16 06:15 somedir

I can do it with
Code:
cd /root/test
ln -s somedir/actualfile asymlink

but I'm trying to avoid the cd, and also avoid using the full path.

Does anyone know why the -t flag isn't working as expected?

Sed: Transforming 'ls-laR' Output Into A List With Absolute Paths

Hello, this is my first post
First i would like to thank you all for answering other people questions because I've been able to learn from the forum a lot.

I need your help with something.
I have standard output from 'ls -laR /etc' command which looks like this:
Code:
/etc/X11/xorg.conf.d:
total 4
drwxr-xr-x. 2 root root  29 Apr  1 00:46 .
drwxr-xr-x. 5 root root  54 Apr  1 00:43 ..
-rw-r--r--. 1 root root 232 Apr  1 00:46 00-keyboard.conf

/etc/xdg:
total 12
drwxr-xr-x.  4 root root   36 Apr  1 00:43 .
drwxr-xr-x. 87 root root 8192 Apr 12 13:53 ..
drwxr-xr-x.  2 root root    6 Jun 10  2014 autostart
drwxr-xr-x.  2 root root   17 Apr  7 01:25 systemd

by using sed command:
Code:
sed -e '/./!d' -e '/^total/d' -e '/\.$/d' -e 's/:$/\//' list.txt

I have transformed it to the following form:

Code:
/etc/X11/xorg.conf.d/
-rw-r--r--. 1 root root 232 Apr  1 00:46 00-keyboard.conf
/etc/xdg/
drwxr-xr-x.  2 root root    6 Jun 10  2014 autostart
drwxr-xr-x.  2 root root   17 Apr  7 01:25 systemd

and now I would like to achieve absolute paths at the end of each row

Code:
-rw-r--r--.  1 root root  232 Apr  1 00:46 /etc/X11/xorg.conf.d/00-keyboard.conf
drwxr-xr-x.  2 root root    6 Jun 10  2014 /etc/xdg/autostart
drwxr-xr-x.  2 root root   17 Apr  7 01:25 /etc/xdg/systemd


How do I join(merge) filenames with corresponding absolute path to their parent directory?



I know how to extract filenames using awk and get this:
Code:
00-keyboard.conf

autostart
systemd

but I don't know what to do next. Should I use some hitech sed option or go for loop or try with arrays? Help. Heeeelp

Slackware 14.0 - End User Changing Password Failed

Hi all,

I am slackware 14.0 user. Recently I face one problem. As a root i can change one of my normal user's (assuming Peter) password. However, when I login as Peter, and try to change the password, the system does not allow me to renew my password.


root@slackwa /etc# ls -la | grep shadow
-rw-r----- 1 root shadow 9 Nov 29 2013 gshadow
-rw------- 1 root root 0 Jun 20 2013 gshadow-
-rw-r----- 1 root shadow 2272 Apr 12 22:44 shadow
-rw------- 1 root root 2274 Apr 12 21:40 shadow-
root@slackwa /etc# ls -la | grep passwd
-rw-r--r-- 1 root root 2362 Apr 12 12:58 passwd
-rw------- 1 root root 2306 Jan 8 17:38 passwd-
-rw-r--r-- 1 root root 2305 Aug 11 2014 passwd~


peter@slackwa ~$ which passwd
/usr/bin/passwd
peter@slackwa ~$ ls -la /usr/bin/passwd
-rws--x--x 1 root root 68725 Sep 14 2012 /usr/bin/passwd*

peter@slackwa ~$ passwd
Changing password for peter
Old password:
Incorrect password for peter.
The password for peter is unchanged.

One thing I can assure is the password I input is correct. I have another slackware 14 running on Dell R410, but it does not has this problem.


Please kindly advice. Thank you.

Tree Cmd Is Not Working

Hi All,

Not able to find TREE command in EL6, its working fine in EL5. Need help on this.

Below are the details.



[root@localhost ~]# mkdir -p /college/sports/performer/cricket

[root@localhost ~]# tree /college/
-bash: tree: command not found

[root@localhost ~]# tree college/
-bash: tree: command not found

[root@localhost ~]# which tree
/usr/bin/which: no tree in (/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin: /usr/bin:/root/bin)

[root@localhost ~]# uname -a
Linux localhost.localdomain 2.6.32-71.el6.x86_64 #1 SMP Wed Sep 1 01:33:01 EDT 2010 x86_64 x86_64 x86_64 GNU/Linux

[root@localhost ~]# id
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel) context=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023

What Is The Keepalived Iptables Port?

For CentOS6, I have installed keepalived on two machine. When I run "ip addr list eth2" it shows that the virtual is active on both servers. When I turn the firewall off, it works correctly and failover moves the correctly from one machine to another. What port do I need to open?

When I turn the firewall off, I get the correct eded output

[root@usivnprdldbuh003 ~]# ip addr list eth2
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:19:b9:e9:4b:ff brd ff:ff:ff:ff:ff:ff
inet 192.168.201.20/24 brd 192.168.201.255 scope global eth2
inet 192.168.201.10/32 brd 192.168.201.255 scope global eth2
inet6 fe80::219:b9ff:fee9:4bff/64 scope link
valid_lft forever preferred_lft forever
[root@usivnprdldbuh003 ~]#

[root@usivnprdldbuh004 ~]# ip addr list eth2
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:19:b9:e8:f1:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.201.21/24 brd 192.168.201.255 scope global eth2
inet6 fe80::219:b9ff:fee8:f1c8/64 scope link
valid_lft forever preferred_lft forever
[root@usivnprdldbuh004 ~]#




And everything works. But if I turn on the firewall, I get exactly the same output for both
[root@usivnprdldbuh003 ~]# ip addr list eth2
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:19:b9:e9:4b:ff brd ff:ff:ff:ff:ff:ff
inet 192.168.201.20/24 brd 192.168.201.255 scope global eth2
inet 192.168.201.10/32 brd 192.168.201.255 scope global eth2
inet6 fe80::219:b9ff:fee9:4bff/64 scope link
valid_lft forever preferred_lft forever
[root@usivnprdldbuh003 ~]#

[root@usivnprdldbuh004 ~]# ip addr list eth2
4: eth2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000
link/ether 00:19:b9:e8:f1:c8 brd ff:ff:ff:ff:ff:ff
inet 192.168.201.21/24 brd 192.168.201.255 scope global eth2
inet 192.168.201.10/32 brd 192.168.201.255 scope global eth2
inet6 fe80::219:b9ff:fee8:f1c8/64 scope link
valid_lft forever preferred_lft forever
[root@usivnprdldbuh004 ~]#

What port does it use to validate the network device.

Using Cut -d" " To Cut Out The String Before, Not After

Hi Guys,
i have this Code:
uid=0(root) gid=0(root)

i would like to have the word "root" only from the first field, and later from the second field

i use the command
Code:
[root@v1-6 ~]# cat test-uid |cut -d"(" -f1
brms2
uid=0

[root@v1-6 ~]# cat test-uid |cut -d")" -f1
brms2
uid=0(root

it cut the word after the -d, how can i make it to cut the word BEFORE the -d

expected should be:
cut -d"(" -f1
root)

then i can proceed to eliminate the ) later on.
hope this is not confusing you guys

Thanks,

Simlink Not Working

I have a user: mim that has within it a folder /mimmim and within that, a folder called
/Src. user: mim has root privileges.

There is an Install file in /home/mim/ that uses a file in /Src called pgp.h. pgp.h references a file /openssl/opensslv.h. The opensslv.h is actually in the newer openssl installations he /usr/local/ssl/include/openssl/

I tried to do a 'sudo ln -s /usr/local/ssl/include/openssl openssl' from /home/mim/, as well as from within the /home/mim/mimmim/ and from within /home/mim/mimmim/Src/. I still get this error however:

pgp.h:16:30: fatal error: openssl/opensslv.h: No such file or directory
compilation terminated.

I guess I am not sim linking correctly.

Freya Installed With No Root

I had installed freya 64 bit version the first time all worked fine til i connected a second monitor it just booted in a loop wasn't able to log in any more .I searched for 4 days on google wasn't able to find a solution .I just reinstalled it but now my root pass word (not the same like the first time ) plus I can't update it won't recognize my password as root plus when it was installed there is not root listing like before? Can any one help me?

Space Disk "used" In Df Is Nowhere To Be Found With Du

Hello,

I am facing an issue with a filesystem (/dev/sda3); I see space used on it (around 365GB) when I am looking at the host with "df -h" command.

Code:
[root@srv_omega /]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sda3             443G  365G   56G  87% /
tmpfs                  95G   56K   95G   1% /dev/shm
/dev/sda1             484M   39M  421M   9% /boot
/dev/sdb1             3.6T  1.3T  2.2T  36% /hadoop/disk1
/dev/sdc1             3.6T  1.3T  2.2T  37% /hadoop/disk2
/dev/sdd1             3.6T  1.3T  2.2T  36% /hadoop/disk3
/dev/sde1             3.6T  1.3T  2.2T  37% /hadoop/disk4
/dev/sdf1             3.6T  1.3T  2.2T  36% /hadoop/disk5
/dev/sdg1             3.6T  1.3T  2.2T  36% /hadoop/disk6
/dev/sdh1             3.6T  1.3T  2.2T  36% /hadoop/disk7
/dev/sdi1             3.6T  1.3T  2.2T  36% /hadoop/disk8
/dev/sdj1             3.6T  1.3T  2.2T  36% /hadoop/disk9
/dev/sdk1             3.6T  1.3T  2.2T  36% /hadoop/disk10
/dev/sdl1             3.6T  1.2T  2.3T  36% /hadoop/disk11
/dev/sdm1             3.6T  1.3T  2.2T  36% /hadoop/disk12
/dev/sdn1             3.6T  1.3T  2.2T  36% /hadoop/disk13
/dev/sdo1             3.6T  1.3T  2.2T  37% /hadoop/disk14
/dev/sdp1             3.6T  1.1T  2.4T  30% /hadoop/disk15
cm_processes           95G  8.2M   95G   1% /var/run/cloudera-scm-agent/process

I have looked if any hidden file might cause the issue, no joy.

Code:
[root@srv_omega /]# pwd
/
[root@srv_omega /]#  ls -lrtha
total 121K
drwxr-xr-x    2 root root 4.0K Jun 28  2011 srv
drwxr-xr-x    2 root root 4.0K Jun 28  2011 mnt
drwxr-xr-x    2 root root 4.0K Jun 28  2011 media
drwxr-xr-x    2 root root 4.0K Dec 20  2012 cgroup
drwx------    2 root root  16K Jun  2  2014 lost+found
drwxr-xr-x    2 root root 4.0K Jun  2  2014 selinux
-rw-r--r--    1 root root    0 Jun  3  2014 .autorelabel
drwxr-xr-x   18 root root 4.0K Jun  5  2014 hadoop
drwxr-xr-x   21 root root 4.0K Jun  5  2014 var
dr-xr-xr-x    9 root root  12K Jun 20  2014 lib64
dr-xr-xr-x    2 root root  12K Jun 21  2014 sbin
dr-xr-xr-x    2 root root 4.0K Jun 21  2014 bin
dr-xr-xr-x    5 root root 1.0K Jun 22  2014 boot
dr-xr-x---    5 root root 4.0K Jun 22  2014 root
drwxr-xr-x    6 root root 4.0K Jun 22  2014 opt
drwxr-xr-x    3 root root 4.0K Dec 10 19:11 home
dr-xr-xr-x   13 root root 4.0K Dec 12 16:18 lib
dr-xr-xr-x 1140 root root    0 Apr 30 15:11 proc
drwxr-xr-x   13 root root    0 Apr 30 15:11 sys
-rw-r--r--    1 root root    0 Apr 30 15:11 .autofsck
drwxr-xr-x    2 root root    0 Apr 30 15:11 misc
drwxr-xr-x    2 root root    0 Apr 30 15:11 net
drwxr-xr-x   15 root root 4.0K Apr 30 15:12 usr
drwxr-xr-x   19 root root 4.6K Apr 30 15:12 dev
dr-xr-xr-x   27 root root 4.0K Apr 30 15:12 ..
dr-xr-xr-x   27 root root 4.0K Apr 30 15:12 .
drwxr-xr-x  122 root root  12K May  4 03:33 etc
drwxrwxrwt   16 root root 4.0K May  7 06:14 tmp

So I try to find where the space is used with a "du -sh" command

Code:
[root@srv_omega /]# pwd
/
[root@srv_omega /]# du -sh *
7.8M    bin
29M     boot
4.0K    cgroup
280K    dev
26M     etc
19T     hadoop
124K    home
144M    lib
26M     lib64
16K     lost+found
4.0K    media
0       misc
4.0K    mnt
0       net
7.9G    opt
du: cannot access `proc/9170/task/27326/fdinfo/538': No such file or directory
du: cannot access `proc/45119/task/45119/fd/4': No such file or directory
du: cannot access `proc/45119/task/45119/fdinfo/4': No such file or directory
du: cannot access `proc/45119/fd/4': No such file or directory
du: cannot access `proc/45119/fdinfo/4': No such file or directory
du: cannot access `proc/45160': No such file or directory
0       proc
3.8M    root
17M     sbin
4.0K    selinux
4.0K    srv
0       sys
3.9M    tmp
2.6G    usr
16G     var

So as far as I understand, only /hadoop is a suitable suspect (as cumulative size of all the other folders on "/" are well below the 365GB)

Code:
[root@srv_omega hadoop]# cd /
[root@srv_omega /]# cd /hadoop
[root@srv_omega hadoop]# ls -lrtha
total 72K
drwxr-xr-x  2 root root 4.0K Jun  5  2014 disk16
drwxr-xr-x 18 root root 4.0K Jun  5  2014 .
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk1
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk11
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk10
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk13
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk12
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk14
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk2
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk4
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk3
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk6
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk5
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk8
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk7
drwxr-xr-x  4 root root 4.0K Jun 22  2014 disk9
drwxr-xr-x  5 root root 4.0K Nov 19 20:02 disk15
dr-xr-xr-x 27 root root 4.0K Apr 30 15:12 ..

All folders from 1 to 15 are on different filesystems, so the folder disk16 seems to be the only option but there is nothing in it.

Code:
[root@srv_omega hadoop]# cd disk16/
[root@srv_omega disk16]# ls -lrtha
total 8.0K
drwxr-xr-x 18 root root 4.0K Jun  5  2014 ..
drwxr-xr-x  2 root root 4.0K Jun  5  2014 .
[root@srv_omega disk16]#

I just don't get it; no folder seems responsible for the "365Gb"...

Any idea on how I could try to find out where those "365GB" are ?