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

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?

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.

Hi, I've just recently installed MySQL connector/c from source code on my Slackware 14.1 x64

I read the official instructions of the connector but I felt a bit disorientated when I read:
Code:

1 -Change location to the top-level directory of the source distribution.

I interpreted that I have to go to the "highest" directory Code:

/

So I wrote: Code:

 
        #                            cd /

root@- /#                            tar xzvf /home/normal/Downloads/mysql-connector-c-6.1.6-src.tar.gz 

root@- /#                            cd /mysql-connector-c-6.1.6-src/

root@- /mysql-connector-c-6.1.6-src# cmake -G "Unix Makefiles"

root@- /mysql-connector-c-6.1.6-src# make 

root@- /mysql-connector-c-6.1.6-src# make install

Then I did:
Code:

ln -s /usr/local/mysql-5.6.25/include /usr/include

But when I try to compile a program in c with #include <mysql.h> i get this error:
Code:

# gcc ctemp.c 
In file included from ctemp.c:2:0:
/usr/include/mysql.h:57:27: fatal error: mysql_version.h: No such file or directory
 #include "mysql_version.h"
                           ^

What can I do? Thanks a lot and sorry for poor english

PD: If you need the official instructions I paste here the link: https://dev.mysql.com/doc/connector-...on-source.html

I created 3 test machine and made them into cluster.
On Virtual
"Virtual Machine Manager 0.9.0"
Machines them selves are CentOS 5.11.

Code:

<cluster name="mycluster" config_version="3">
   <clusternodes>
     <clusternode name="one" nodeid="1">
         <fence>
         </fence>
     </clusternode>
     <clusternode name="two" nodeid="2">
         <fence>
         </fence>
     </clusternode>
     <clusternode name="three" nodeid="3">
         <fence>
         </fence>
     </clusternode>
   </clusternodes>
   <fencedevices>
   </fencedevices>
   <rm>
   </rm>
</cluster>

When I start cman service. I see get this:

Code:

[root@one ~]# time service cman restart
Stopping cluster: 
   Stopping fencing... done
   Stopping cman... done
   Stopping ccsd... done
   Unmounting configfs... done
                                                           [  OK  ]
Starting cluster: 
   Loading modules... done
   Mounting configfs... done
   Starting ccsd... done
   Starting cman... done
   Starting daemons... done
   Starting fencing... failed

                                                           [FAILED]

real	5m7.353s
user	0m0.063s
sys	0m0.095s
[root@one ~]#

clustat:

Code:

[root@one ~]# clustat 
Cluster Status for mycluster @ Tue Jun  2 11:10:28 2015
Member Status: Inquorate

 Member Name                                            ID   Status
 ------ ----                                            ---- ------
 one                                                        1 Online, Local
 two                                                        2 Offline
 three                                                      3 Offline

[root@one ~]#

Thank you.

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 ?

System Info:

I have normal user in CentOS 7 whose name is "mostafa" (the name of the account).

I naturally have another user called root with all privileges. User "mostafa" is put into sudoers file, too.

The OS is installed in VmWare, so the system is all mine.

Problem:

Now I create a file with touch file.sh and put a command in it, but when I want to run it with Code:

sudo ./file.sh

, an error is shown that the command Code:

./file.sh

does not exist. But if I Code:

 sudo chmod 777 ./file.sh

then it gets run. My question is that, why should I use Code:

chmod 777

when I myself have created the file, and I am in sudoers.

Can anyone explain me why shuold I still use Code:

sudo chmod 777

when the creator of the file is me.

There's something really weird happening with permissions on a directory in linux. I have the directory /dir

Code:

ls -ld /dir
drwxrwxrwx. 2 root root 4096 Jan  8 00:06 dir
chmod 2777 /dir [this sets the setgid bit on]
ls -ld /dir
drwxrwsrwx. 2 root root 4096 Jan  8 00:06 /dir

And this is what I expect it to do.
However, when I change it to setid (WITHOUT setgid), it simply doesn't work. Instead of overwriting, it cumulates:
Code:

chmod 4777 /dir [for setting setuid bit on]
drwsrwsrwx. 2 root root 4096 Jan  8 00:06 /dir

As you can see, the setgid bit is still on together with the setuid! However, if I run:
Code:

chmod -s /dir

then the file has a 0777 permission.

And then again, if I change its permission to 4777 (so setuid):
Code:

chmod 4777 /dir
drwsrwxrwx. 2 root root 4096 Jan  8 00:06 /dir

it acts normally. So the same chmod 4777 acts differently in two different contexts.

I really can't understand it. Basically, I cannot get rid of the setuid/setgid through binary permissions. The sticky bit works fine. Changing from 1777 to 0777 adds and removes "t" respectively. What am I to make of all this? This behaviour makes no sense to make especially given that we can change the permissions to 6777 (setuid + setgid).

Hello, I have an embedded linux device. I can connect to the device and I can upload or download files. No problem with this. But, at first connection, I want to connect to "/" directory instead of "/root". In the device file system, there are files ssh_config and sshd_config under /etc/ssh directory. I think I have to do something with these files but I don't know what.

I don't exactly know what mean "/root" and "/" directories. I think that the real root directory is "/" directory which is empty but when I connect with filezilla, the "/root" directory is the default so I had to go back to / directory everytime.

Hello all,
I am working on setting up a script to set certain things and install them on new installs of linux, however I am running into an issue with appending code onto the end of my .bashrc.

I am trying to append Code:

PS1='\033[1;32m[\A \u@\h \W]\033[0m$ '

into .bashrc and I have tried the following methods without success
Code:

echo PS1='\[\e[1;31m\][\A \u@\h \W]\$\[\e[0m\] ' >> /root/.bashrc
echo 'PS1='\[\e[1;31m\][\A \u@\h \W]\$\[\e[0m\] '' >> /root/.bashrc
echo 'PS1=\'\[\e[1;31m\][\A \u@\h \W]\$\[\e[0m\] \'' >> /root/.bashrc
echo "PS1='\[\e[1;31m\][\A \u@\h \W]\$\[\e[0m\] '" >> /root/.bashrc

as well as several others with not avail. the issue is that echo is interpreting the single quotes that I would like printed. I have tried escaping them with not luck. any ideas?

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