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31
Linux Development & Programming / Embedded Linux Course
« Last post by emblogicemb on February 10, 2013, 10:08:37 AM »

Current educational programs are comprised of the newly and innovatively designed embedded Linux course initiatives through which the aspirants are facilitated to have the advanced learning and training for making themselves more able towards dealing with such kind of technologies. Leading institutions and organizations cover up such kind of requirements in the best possible manner through initiating project based industrial training programs to the students in order to promote the level of their education, knowledge and skills in this field.
32
General Networking Support in Linux / Re: Fedora 16 - 1 problem
« Last post by stormbrush on February 03, 2013, 10:45:05 AM »
Solved with this :

sudo -s
echo "nameserver 8.8.8.8" >> /etc/resolv.conf
33
General Networking Support in Linux / Fedora 16 - 1 problem
« Last post by stormbrush on February 02, 2013, 02:01:56 PM »
Dear friends I hope that someone will know what is going here in my Fedora, and how to fix problem
(Fedora 16 Gnome 3).
First I chose Wireless network and connect. Then I open terminal and start pppoe-setup.
When setup is finish I was unable to going on internet. Here is copy paste from ifconfig:
# ifconfig
lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:324 errors:0 dropped:0 overruns:0 frame:0
          TX packets:324 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:26680 (26.0 KiB)  TX bytes:26680 (26.0 KiB)

ppp0      Link encap:Point-to-Point Protocol 
          inet addr:10.54.4.232  P-t-P:10.54.4.1  Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1480  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:3
          RX bytes:46 (46.0 b)  TX bytes:40 (40.0 b)

p2p1      Link encap:Ethernet  HWaddr 00:13:72:98:56:81 
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Interrupt:16

wlan0     Link encap:Ethernet  HWaddr 00:14:85: D1:70:CE 
          inet addr:169.254.10.88  Bcast:169.254.255.255  Mask:255.255.0.0
          inet6 addr: fe80::214:85ff:fed1:70ce/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:154 errors:0 dropped:0 overruns:0 frame:0
          TX packets:215 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:6574 (6.4 KiB)  TX bytes:21360 (20.8 KiB)

# pppoe-status
pppoe-status: Link is up and running on interface ppp0
15: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1480 qdisc pfifo_fast state UNKNOWN qlen 3
    link/ppp
    inet 10.54.4.232 peer 10.54.4.1/32 scope global ppp0

When I try to ping 4.4.4.4.  I got: unknown host.
# ping 4.4.4.4.
ping: unknown host 4.4.4.4.



This is my route with ppp0 down and up:

# route -ve
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
link-local      *               255.255.0.0     U         0 0          0 wlan0
224.0.0.0       *               240.0.0.0       U         0 0          0 wlan0
# /sbin/ifup ppp0
# pppoe-status
pppoe-status: Link is up and running on interface ppp0
4: ppp0: <POINTOPOINT,MULTICAST,NOARP,UP,LOWER_UP> mtu 1480 qdisc pfifo_fast state UNKNOWN qlen 3
    link/ppp
    inet 10.54.4.247 peer 10.54.4.1/32 scope global ppp0
# route -ve
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
default         *               0.0.0.0         U         0 0          0 ppp0
10.54.4.1       *               255.255.255.255 UH        0 0          0 ppp0
link-local      *               255.255.0.0     U         0 0          0 wlan0
224.0.0.0       *               240.0.0.0       U         0 0

I don’t know what to do, so every help is a good, and thanks in advance.
34
General Networking Support in Linux / Re: YUM CONFIGURATION
« Last post by itguy on January 26, 2013, 06:45:36 PM »
you can check below site for step by step info.

http://redhatserverconfiguration.blogspot.in/p/yum-server-introduction-yellowdog.html
35
Linux Servers Support / Transport openAM 9 configurations between environments
« Last post by kabu on January 23, 2013, 08:43:05 PM »
Hello,

 

I’m trying to find the least painful way of transporting config files between different environments and I have found many things that can break the system after the transport. I got a script that will keep the values for attributes correct for the ones that are depended on the environment but here is the list of couple of things that I’m not sure about. Maybe someone can shed some light on them.

What I want to do is to simply transport xml file based on the steps from the book for openAM 9 (simply export/import using ssoadm to xml file) but by analyzing the file in depth I find many differences that might break the system, so any help is appreciated.

 

1.

In every xml file we have sections for ‘iplanet-am-auth-ldap-bind-passwd’ with hash value under it but in one xml file we’re missing one line with hash. I was wondering if we add that line with the correct hash value will it break the system or it won’t matter as long as the hash matches target environment?

 

2.

Does the size of the ‘iplanet-am-logging-buffer-size’ has to match what was originally setup in the target environment or it will be ok if we overwrite the value from the source xml file?

 

3.

For some reason we have different links in delegation-rules with the same name, for example:

# environment1 - sms://dc=test-domain,dc=net/sunEntitlementService/1.0/application/ws/1/entitlement/entitlements

# environment2 - sms://dc=test-domain,dc=net/sunEntitlementService/1.0/application/ws/1/entitlement/decision

# environment3  - sms://*dc=test-domain,dc=net/sunIdentityRepositoryService/1.0/application/agent

 

It could be due the way the server was setup long time ago or due to development processes over time ( I don’t know) but my question is:

If the rule names are the same but some(or all) options/values are different between environments and we overwrite them with the source file from different environment, will this break things or it won’t matter ?

 

Thank you,
36
Forum Talk / remote logging problem with syslog utility
« Last post by shri_22ram on January 23, 2013, 11:30:28 AM »
I am using Two centOS linux machines. From the third machine (CentoOS_Main) i am redirecting syslog messages to centoOS_1 . After some time i am redirecting syslog messages to CentOS_2. It works fine. After sometime i rebooted my CentOS_Main machine and i am observing very few syslog messages sent to centOS_1. Actually nothing has to sent to centOS_1.
I have observed this by capturing packets by tcpdump.

In /etc/syslog.conf i have used the ip of the centOS_1 machine. After that manually edited the syslog.conf by deleting the centOS_1 ip and entering centOS_2 ip.

Thanks,
Shriram
37
Linux Servers Support / Block Email from postfix
« Last post by hungvx2 on January 23, 2013, 10:32:17 AM »
I'm using postfix to send and receive mail. I want to block Vietnamese Subject but do not know how to configure. Please help me!

Thank you,
38
Linux Kernel / debugfs : Unknown symbol debugfs_create_dir
« Last post by DAVER on January 17, 2013, 08:12:33 AM »
Hi,
    I'm using Ubuntu 12.04 and i was trying to debug the kernel using debugs. I have compiled the kernel with required options like,

Code: [Select]
Kernel hacking[*] Magic SysRq key
Kernel hacking[*] Debug filesystem

I have written a module which include kernel linked list and kernel threads. The module works fine. Then i have added the debugfs code in the same module and i got the following error while inserting the module(i.e. during insmod command),
Code: [Select]
insmod: error inserting 'kll.ko': -1 Unknown symbol in module
I have checked dmesg and i found that the debufs calls like debugfs_create_dir are said to be unknown...

Now I'm stuck at this point.

Any pointers or help is welcome!!
39
Linux Servers Support / Re: How to Map AD groups to Samba share
« Last post by sunnysthakur on January 16, 2013, 01:17:15 PM »
I am able to solve this issue now and AD groups are reflected with samba permissions.
40
Linux Servers Support / ldap restore from ldif file problem
« Last post by kabu on January 11, 2013, 04:01:06 PM »
Hello,
I have a problem with restoring from a ldiff backup file that I did just recently using this command:
Code: [Select]
$ ldapsearch -h localhost -p 1389 -D cn=admin -w somepassword -b "dc=somedomain,dc=com" "objectclass=*" |perl -p -0040 -e 's/\n //' >> 01102013.vl34.ldiff
I removed everything from ldap using Apache Directory Studio but when I tried using this command:

Code: [Select]
$ sudo ldapadd -h localhost -p 1389 -x -D cn=admin -w somepassword -f 01102013.vl34.ldiff
I get this:
Code: [Select]
adding new entry  "dc=somedomain,dc=com"
adding new entry "ou=services,dc=somedomain,dc=com"
....
  and couple of more lines like that but then I get this:

*** stack smashing detected ***: ldapadd terminated
======= Backtrace: =========
/lib/libc.so.6(__fortify_fail+0x4d)[0x8fbfcd]
/lib/libc.so.6[0x8fbf7a]
ldapadd[0x8055614]
ldapadd[0x80541db]
ldapadd[0x804adef]
/lib/libc.so.6(__libc_start_main+0xe6)[0x819ce6]
ldapadd[0x804a6b1]
======= Memory map: ========
00110000-00111000 r-xp 00000000 00:00 0          [vdso]
00111000-0011d000 r-xp 00000000 fd:00 278303     /lib/libnss_files-2.12.so
0011d000-0011e000 r--p 0000b000 fd:00 278303     /lib/libnss_files-2.12.so
0011e000-0011f000 rw-p 0000c000 fd:00 278303     /lib/libnss_files-2.12.so
0011f000-00124000 r-xp 00000000 fd:00 261484     /lib/libnss_dns-2.12.so
00124000-00125000 r--p 00004000 fd:00 261484     /lib/libnss_dns-2.12.so
00125000-00126000 rw-p 00005000 fd:00 261484     /lib/libnss_dns-2.12.so
006df000-00728000 r-xp 00000000 fd:00 284863     /lib/libfreebl3.so
00728000-00729000 r--p 00048000 fd:00 284863     /lib/libfreebl3.so
00729000-0072a000 rw-p 00049000 fd:00 284863     /lib/libfreebl3.so
0072a000-0072e000 rw-p 00000000 00:00 0
00730000-00737000 r-xp 00000000 fd:00 284864     /lib/libcrypt-2.12.so
00737000-00738000 r--p 00007000 fd:00 284864     /lib/libcrypt-2.12.so
00738000-00739000 rw-p 00008000 fd:00 284864     /lib/libcrypt-2.12.so
00739000-00760000 rw-p 00000000 00:00 0
007aa000-007c7000 r-xp 00000000 fd:00 284837     /lib/libgcc_s-4.4.6-20120305.so.1
007c7000-007c8000 rw-p 0001d000 fd:00 284837     /lib/libgcc_s-4.4.6-20120305.so.1
007d4000-007d8000 r-xp 00000000 fd:00 284849     /lib/libplc4.so
007d8000-007d9000 r--p 00003000 fd:00 284849     /lib/libplc4.so
007d9000-007da000 rw-p 00004000 fd:00 284849     /lib/libplc4.so
007e1000-007ff000 r-xp 00000000 fd:00 284832     /lib/ld-2.12.so
007ff000-00800000 r--p 0001d000 fd:00 284832     /lib/ld-2.12.so
00800000-00801000 rw-p 0001e000 fd:00 284832     /lib/ld-2.12.so
00803000-0098f000 r-xp 00000000 fd:00 284833     /lib/libc-2.12.so
0098f000-00991000 r--p 0018c000 fd:00 284833     /lib/libc-2.12.so
00991000-00992000 rw-p 0018e000 fd:00 284833     /lib/libc-2.12.so
00992000-00995000 rw-p 00000000 00:00 0
00997000-0099a000 r-xp 00000000 fd:00 284840     /lib/libdl-2.12.so
0099a000-0099b000 r--p 00002000 fd:00 284840     /lib/libdl-2.12.so
0099b000-0099c000 rw-p 00003000 fd:00 284840     /lib/libdl-2.12.so
009b6000-009cd000 r-xp 00000000 fd:00 284838     /lib/libpthread-2.12.so
009cd000-009ce000 r--p 00016000 fd:00 284838     /lib/libpthread-2.12.so
009ce000-009cf000 rw-p 00017000 fd:00 284838     /lib/libpthread-2.12.so
009cf000-009d1000 rw-p 00000000 00:00 0
00aea000-00afc000 r-xp 00000000 fd:00 284835     /lib/libz.so.1.2.3
00afc000-00afd000 r--p 00011000 fd:00 284835     /lib/libz.so.1.2.3
00afd000-00afe000 rw-p 00012000 fd:00 284835     /lib/libz.so.1.2.3
00b21000-00b36000 r-xp 00000000 fd:00 284845     /lib/libresolv-2.12.so
00b36000-00b37000 ---p 00015000 fd:00 284845     /lib/libresolv-2.12.so
00b37000-00b38000 r--p 00015000 fd:00 284845     /lib/libresolv-2.12.so
00b38000-00b39000 rw-p 00016000 fd:00 284845     /lib/libresolv-2.12.so
00b39000-00b3b000 rw-p 00000000 00:00 0
00c7f000-00c8c000 r-xp 00000000 fd:00 261714     /lib/liblber-2.4.so.2.5.6
00c8c000-00c8d000 r--p 0000d000 fd:00 261714     /lib/liblber-2.4.so.2.5.6
00c8d000-00c8e000 rw-p 0000e000 fd:00 261714     /lib/liblber-2.4.so.2.5.6
05af8000-05b11000 r-xp 00000000 fd:00 43422      /usr/lib/libsasl2.so.2.0.23
05b11000-05b12000 r--p 00018000 fd:00 43422      /usr/lib/libsasl2.so.2.0.23
05b12000-05b13000 rw-p 00019000 fd:00 43422      /usr/lib/libsasl2.so.2.0.23
05b25000-05b70000 r-xp 00000000 fd:00 284874     /lib/libldap-2.4.so.2.5.6
05b70000-05b71000 r--p 0004a000 fd:00 284874     /lib/libldap-2.4.so.2.5.6
05b71000-05b72000 rw-p 0004b000 fd:00 284874     /lib/libldap-2.4.so.2.5.6
05bd2000-05bd5000 r-xp 00000000 fd:00 284850     /lib/libplds4.so
05bd5000-05bd6000 r--p 00002000 fd:00 284850     /lib/libplds4.so
05bd6000-05bd7000 rw-p 00003000 fd:00 284850     /lib/libplds4.so
05bd9000-05d0d000 r-xp 00000000 fd:00 43393      /usr/lib/libnss3.so
05d0d000-05d10000 r--p 00134000 fd:00 43393      /usr/lib/libnss3.so
05d10000-05d12000 rw-p 00137000 fd:00 43393      /usr/lib/libnss3.so
05d14000-05d4e000 r-xp 00000000 fd:00 284848     /lib/libnspr4.so
05d4e000-05d4f000 r--p 00039000 fd:00 284848     /lib/libnspr4.so
05d4f000-05d50000 rw-p 0003a000 fd:00 284848     /lib/libnspr4.so
05d50000-05d52000 rw-p 00000000 00:00 0
05d5f000-05d7b000 r-xp 00000000 fd:00 42912      /usr/lib/libnssutil3.so
05d7b000-05d7e000 r--p 0001c000 fd:00 42912      /usr/lib/libnssutil3.so
05d7e000-05d7f000 rw-p 0001f000 fd:00 42912      /usr/lib/libnssutil3.so
05d81000-05da9000 r-xp 00000000 fd:00 43395      /usr/lib/libsmime3.so
05da9000-05dab000 r--p 00027000 fd:00 43395      /usr/lib/libsmime3.so
05dab000-05dac000 rw-p 00029000 fd:00 43395      /usr/lib/libsmime3.so
05dae000-05de7000 r-xp 00000000 fd:00 43394      /usr/lib/libssl3.so
05de7000-05de9000 r--p 00038000 fd:00 43394      /usr/lib/libssl3.so
05de9000-05dea000 rw-p 0003a000 fd:00 43394      /usr/lib/libssl3.so
08048000-0805a000 r-xp 00000000 fd:00 43523      /usr/bin/ldapmodify
0805a000-0805b000 r--p 00011000 fd:00 43523      /usr/bin/ldapmodify
0805b000-0805c000 rw-p 00012000 fd:00 43523      /usr/bin/ldapmodify
0805c000-0809e000 rw-p 00000000 00:00 0          [heap]
b7fed000-b7ff2000 rw-p 00000000 00:00 0
b7ffc000-b8000000 rw-p 00000000 00:00 0
bffeb000-c0000000 rw-p 00000000 00:00 0          [stack]

I guess the process fails because not all data are imported, I did some research but can't seem to find

a real solution to that. I was hoping that someone could shed some light on that problem or maybe

solution if that happened to someone in the past?
I'm using CentOS 6.3 -  2.6.32-279.5.1.el6.i686 with OpenDS-2.2.1 for ldap.
Thanks
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