Contents Fo Executable Files

Hi All,

Is there a way to look into the contents of cmds under /bin (touch, usermod, cp) which we are executing for administration tasks. If yes, how ?

FYR: Attached the same when i ve tried for the same.

[root@localhost arun]# head -5 /usr/sbin/usermod
ELF>�'@��2��%%k${%�*� 4�*9~E�l�%��7 Z��,[��:�`)��#��@��@44Q�t/lib64/ld-linux-x86-64.so.2GNU wšADL{~�n/t��|CE� ��*�%T%�U
�3c)r@�BITf��%�2��K%�2%�QA=�l�
%~c��%F* ] ��%I��ڼ�.%7'�*�%�e�]�nJ[��*SJ�QC�BY��1!u)��%e*�7�| �~�Kl*;\
%��%��h"@$@:~��ak��xar��xah
ti=��ui��U7=*��aaaaaa a(a0a8a@Haa�UPaaU7=��PU7=x��`U7=��U7=��U7=a��8=a��7=�M'7=��7=K'7=��7=*G'Xa� �7=*P'7=п7=�&'7=�ii
`a
paxaaaaa*a�a�a�a�a�aa�a�a�a�a �a!aa#a$aw a%(a&0a'8a(@a)Ha*Pa+Xa,`a-ha.pa/xa0a1a2a3a4*a5�a6�a7�a8�a9�a:�a;�a<�a=�a>�ax�a?aaAaBaC aD(aE0aF8aG@aHHaIPaJXaK`aLhaMpaNxaOaPaQaRaS*aT�aU�aV�aW�aX�aY�H��5�� %�� @�%�� h��%�� h��%�� h��%�� h��%� h�*��%� h��%� h��%� h�p��%z� �`��%r� hTTY�avH�P��%j� h
�@��%b� h
�0��%Z� h
��%J� h��%B� h��%:� h��%2� h��%*� h��%"� h��%� h�*��%� h��%
� h��%� h�p��%�� h�`��%�� h�P��%�� h�@��%�� h0��%�� h� ��%�� h��%�� h��%�� h��%�� h ��%�� h!��%�� h"��%�� h#��%� h$�*��%� h%��%� h&��%� h'�p��%z� h(�`��%r� h)�P��%j� h*�@��%b� h+�0��%Z� h,� ��%R� h-��%J� h.��%B� h/��%:� h0��%2� h1��%*� h2��%"� h3��%� h4�*��%� h5��%
PuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTY PuTTYPuTTYPuTTYPuTTY[rYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuT TYPuTTYPuTTYPuTTYPuTT
bash: PuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTY PuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTYPuTTY: command not found
[root@localhost arun]#

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

Can Not Connect Ftp Server

I have installed vsftp to the server , the status is running now , but when use the command "ftp localhost" , it pops the "421 Service not available." , would advise what is wrong ? thanks

bash-3.2# /etc/rc.d/init.d/vsftpd status
vsftpd (pid 580) is running...
bash-3.2# ps -ef |grep vsftpd
root 580 1 0 15:44 ? 00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
root 607 467 0 15:45 pts/0 00:00:00 grep vsftpd
bash-3.2# ftp localhost
Connected to localhost (127.0.0.1).
421 Service not available.

Executable Not Found From /usr/local/bin

Hi,

I installed ghostscript via yum package manager. Later I wanted a newer version of ghostscript and compiled it from source. "make install" placed the gs executable file under /usr/local/bin/gs. This works if I run the command with absolute path, but if try to run gs, the shell will output

"-bash: /usr/bin/gs: No such file or directory"

if I echo the path variable it will display

/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin

If i run whereis it will give me the correct path
gs: /usr/local/bin/gs

How do I make it work so that typing "gs" will run the executable file from the /usr/local/bin/gs?

(I am using Centos 6)

Thanks.

Installed Vsftpd But Can Not Use

I have install vsftpd and start it , but when when to try it by "ftp localhost" , but not work , would advise what is wrong ? thanks

#ps -ef |grep ftp
Code:

root     29896     1  0 10:53 ?        00:00:00 /usr/sbin/vsftpd /etc/vsftpd/vsftpd.conf
root     29899 23821  0 10:53 pts/0    00:00:00 grep ftp

# ftp localhost
Code:

Connected to localhost (127.0.0.1).
421 Service not available.

Cron Ignoring Changes Made In File

Hi,

i have a small problem on my system... I recently wrote a small bash script and added it via crontab -u root -e and it's executed as it should.
Then a few days after i did edit my bash script, but once it is run by cron it doesn't reflect the changes i made to the script. I did manually restart crond, tryed sync, moved my script, renamed it even rstart the server - no success.
If i run my script manually it returns me the expected output.
part of my script (/root/sd.sh):
Code:

#!/bin/sh

echo -n "Checking Raid... "
RAID=`tw-cli /c0/u0 show status | cut -c17-31 | grep -ci OK`
RAIDSTATUS=`tw-cli /c0/u0 show status | head -n1 | cut -c17-31`
if [ $RAID -eq 0 ]; then
  VERIFYING=`tw-cli /c0/u0 show status | cut -c17-31 | grep -ci VERIFYING`
  REBUILDING=`tw-cli /c0/u0 show status | cut -c17-31 | grep -ci REBUILDING`
  if [ $VERIFYING -eq 1 ]; then
    CURRENTSTATUS=`tw-cli /c0/u0 show verifystatus | head -n1 | cut -c46-49`
  fi
  if [ $REBUILDING -eq 1 ]; then
    CURRENTSTATUS=`tw-cli /c0/u0 show rebuildstatus | head -n1 | cut -c47-50`
  fi
  echo "Raid is busy (Raid $RAIDSTATUS$CURRENTSTATUS)"
  exit 1
fi
echo "Raid is idle (Raid $RAIDSTATUS)"

echo -n "Checking for logged in Users... "
USERS=`who | wc -l`
if [ $USERS -gt 0 ]; then
  echo "Users online"
  exit 1
fi
echo "None logged in"

crontab -l :
Code:

root@monster:~# crontab -l
# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h  dom mon dow   command
*/10 * * * * /root/sd.sh | logger
*/30 * * * * /root/dropbox.sh > /dev/null

syslog:
Code:

Mar 21 09:10:01 monster /USR/SBIN/CRON[3998]: (root) CMD (/root/sd.sh | logger)
Mar 21 09:10:01 monster logger: Checking Raid... Raid is busy (Raid )
Mar 21 09:17:01 monster /USR/SBIN/CRON[4045]: (root) CMD (   cd / && run-parts --report /etc/cron.hourly)
Mar 21 09:20:01 monster /USR/SBIN/CRON[4105]: (root) CMD (/root/sd.sh | logger)
Mar 21 09:20:01 monster logger: Checking Raid... Raid is busy (Raid )
Mar 21 09:30:01 monster /USR/SBIN/CRON[4266]: (root) CMD (/root/sd.sh | logger)
Mar 21 09:30:01 monster /USR/SBIN/CRON[4265]: (root) CMD (/root/dropbox.sh > /dev/null)
Mar 21 09:30:01 monster logger: Checking Raid... Raid is busy (Raid )

when i run sh /root/sd.sh
Code:

root@monster:~# sh /root/sd.sh
Checking Raid... Raid is idle (Raid OK)
Checking for logged in Users... Users online
root@monster:~#

Any ideas why? - any help or thoughts appreciated

regards
Pat

Dual Boot Windows7 With With Centos7

hiiii all

I had installed Windows 7 on /dev/sda1 and /dev/sda2 and then I installed Centos 7.
Since then I cant find Windows entry in the Grub.
And i had tried to use all kind of solution found on the net I still cant see any entry.
I had edited 40_custom script adding:

cat <<EOF
menuentry "windows 7" {
insmod part_msdos
insmod ntfs
set root='hd0,msdos1'
search --no-floppy --fs-uuid --set=root FCDAE998DAE95006
chainloader +1
}
EOF

then this command grub2-mkconfig -o /boot/grub2/grub2.cfg

[root@localhost]# grub2-mkconfig -o /boot/grub2/grub2.cfg
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-123.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-123.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-93890f189dec4b309c004fdce969ca5a
Found initrd image: /boot/initramfs-0-rescue-93890f189dec4b309c004fdce969ca5a.img

then this
[root@localhost]# tail -10 /boot/grub2/grub.cfg
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###

### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
[root@localhost]#

Still cant find windows in grub
please help me with this guys
thanks

Connecting To Specific Directory With Filezilla

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.

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.

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 ?

How Often A Root Dns Server Is Queried

I havent found out any straight-to-the-point answear yet on the net about how often a root dns server is queried hence i thought i should ask here.

When i use "dig +trace" i notice that my queries allways start from the root "." servers. However, is this also happening with, lets say, a recursive (resolver) dns server?

For example, lets assume that i use at home google's dns servers (8.8.8.8). Is google dns server will indeed first head to the root "." dns server when i query for example.net?

Thanks

Contents Fo Executable Files

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