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Locating the broken links
by Ioannis Vranos 31 Jan '08

31 Jan '08

Is there any command that I can use to find the broken links that point to non-existent files? Thanks a lot.

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ISCSI help
by Plant, Dean 31 Jan '08

31 Jan '08

I am fairly new to ISCSI and SAN technology but having recently invested in the technology I am trying to find out exactly what can and can not be manipulated, filesystem wise, without requiring a reboot. I am using the inbuilt software ISCSI initiator and multipathing in CentOS 5.1. My steps so far. Create 10GB volume on SAN # iscsiadm -m session -R # fdisk /dev/mapper/mpath0 # kpartx -a /dev/mapper/mpath0 # mke2fs -j /dev/mapper/mpath0p1 # mount /dev/mapper/mpath0p1 /test-mount <--works fine to here--> Now I want to extend the volume on the SAN to 15GB run fdisk and use resize2fs to extend the filesystem, is this possible without a reboot? Currently, I don't seem to be able to get fdisk to see the new disk size after extending the volume. I know this can be done using LVM if I created 2 volumes rather than extending but I am curious to know if it can be done without LVM. Any other tips about what can be done with ISCSI would be welcome. Thanks Dean

3 2

No route to host
by horas simalango 31 Jan '08

31 Jan '08

Dear Mr/Mrs/Ms, I have e-mail server using Centos 4.1 So far I can send and receive e-mail using this server, but why to this address: retna(a)pttropical.co.id can not send? Every time I send e-mail to above address my server always respon with this massage: ----- Transcript of session follows ----- <retna(a)pttropical.co.id>... Deferred: mail.pttropical.co.id.: No route to host Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old Please help me solve this problem! Previously Thank yuo for your help. Regards, Horasima SML.

2 1

NoMachine NX Server
by Sobari Tanuwijaya 31 Jan '08

31 Jan '08

Hi, Is there anybody ever have an experience install NoMachine NX Server on centos? Is there anything need to get special attention? Thanks in advance -- Tanu --

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Re: [CentOS] No route to host
by Les Bell 31 Jan '08

31 Jan '08

Bill Campbell <centos(a)celestial.com> wrote: >> Most likely there was a temporary problem connecting to their server. I was just able to ping mail.pttropical.co.id, their only listed MX server. << Yep. And telnetting to port 25 gives a connection. Looks OK now: telnet mail.pttropical.co.id 25 Trying 203.130.193.106... Connected to mail.pttropical.co.id (203.130.193.106). Escape character is '^]'. QUIT Connection closed by foreign host. Best, --- Les Bell, RHCE, CISSP [http://www.lesbell.com.au] Tel: +61 2 9451 1144 FreeWorldDialup: 800909

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Re: [CentOS] No route to host
by Les Bell 31 Jan '08

31 Jan '08

"horas simalango" <horasima(a)gmail.com> wrote: >> Please help me solve this problem! << The commands you'd use to diagnose this problem are: dig pttropical.co.id SOA (That works fine) dig pttropical.co.id MX (That works, and shows mail.pttropical.co.id as their MX) traceroute mail.pttropical.co.id (Which bombs out. Ergo their mail server or an upstream router or link is down). Best, --- Les Bell, RHCE, CISSP [http://www.lesbell.com.au] Tel: +61 2 9451 1144 FreeWorldDialup: 800909

3 2

Network routes
by Jason Pyeron 31 Jan '08

31 Jan '08

I am unable to ping NE.TW.RKB.IP1 from an outside network. Other machines which do not have access or routes for NET.WOR.KA.0 respond just fine. How do I get it to respond on both NET.WOR.KA.0 and NE.TW.RKB.0 given all default traffic should go through NET.WOR.KA.1 unless it is in reply to traffic from NE.TW.RKB.1 or there is an outage. [root@host20 ~]# route -n Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface NET.WOR.KA.0 0.0.0.0 255.255.255.0 U 0 0 0 eth1 192.168.1.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 NE.TW.RKB.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth1 0.0.0.0 NET.WOR.KA.1 0.0.0.0 UG 0 0 0 eth1 0.0.0.0 NE.TW.RKB.1 0.0.0.0 UG 20 0 0 eth0 [root@host20 ~]# ifconfig eth0 Link encap:Ethernet HWaddr 00:17:31:0F:04:AE inet addr:NE.TW.RKB.IP1 Bcast:NE.TW.RKB.255 Mask:255.255.255.0 eth0:pn Link encap:Ethernet HWaddr 00:17:31:0F:04:AE inet addr:192.168.1.20 Bcast:192.168.1.255 Mask:255.255.255.0 eth1 Link encap:Ethernet HWaddr 00:01:03:E9:42:D0 inet addr:NET.WOR.KA.IP2 Bcast:NET.WOR.KA.255 Mask:255.255.255.0 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 TIA -jason -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- - - - Jason Pyeron PD Inc. http://www.pdinc.us - - Sr. Consultant 10 West 24th Street #100 - - +1 (443) 269-1555 x333 Baltimore, Maryland 21218 - - - -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- This message is for the designated recipient only and may contain privileged, proprietary, or otherwise private information. If you have received it in error, purge the message from your system and notify the sender immediately. Any other use of the email by you is prohibited.

4 7

No route to host
by horas simalango 31 Jan '08

31 Jan '08

Dear Mr/Mrs/Ms, I have e-mail server using Centos 4.3 So far I can send and receive e-mail using this server, but why to this address: retna(a)pttropical.co.id can not send? Every time I send e-mail to above address my server always respon with this massage: ----- Transcript of session follows ----- <retna(a)pttropical.co.id>... Deferred: mail.pttropical.co.id.: No route to host Warning: message still undelivered after 4 hours Will keep trying until message is 5 days old Please help me solve this problem! Previously Thank yuo for your help. Regards, Horasima SML.

1 0

yum fails with invalid dependency on sqlite
by Yusuf Goolamabbas 30 Jan '08

30 Jan '08

Hi, I am using Centos 4.6 on x86-64. recently when I tried to do a yum -y check-update this is the output I get [root@amd64 ~]# yum check-update Setting up repositories update 100% |=========================| 951 B 00:00 base 100% |=========================| 1.1 kB 00:00 addons 100% |=========================| 951 B 00:00 Reading repository metadata in from local files primary.xml.gz 100% |=========================| 74 kB 00:01 (process:1999): GLib-CRITICAL **: file gtimer.c: line 106 (g_timer_stop): assertion `timer != NULL' failed (process:1999): GLib-CRITICAL **: file gtimer.c: line 88 (g_timer_destroy): assertion `timer != NULL' failed Traceback (most recent call last): File "/usr/bin/yum", line 29, in ? yummain.main(sys.argv[1:]) File "/usr/share/yum-cli/yummain.py", line 97, in main result, resultmsgs = do() File "/usr/share/yum-cli/cli.py", line 534, in doCommands ypl = self.returnPkgLists() File "/usr/share/yum-cli/cli.py", line 1176, in returnPkgLists ypl = self.doPackageLists(pkgnarrow=pkgnarrow) File "__init__.py", line 904, in doPackageLists File "/usr/share/yum-cli/cli.py", line 75, in doRepoSetup self.doSackSetup(thisrepo=thisrepo) File "__init__.py", line 260, in doSackSetup File "repos.py", line 277, in populateSack File "/usr/lib64/python2.3/site-packages/sqlitecachec.py", line 40, in getPrimary self.repoid)) TypeError: Can not create index on requires table: near "NOT": syntax error This is the output of rpm -qa | grep sqlite [root@amd64 ~]# rpm -qa | grep sqlite python-sqlite-1.1.7-1.2.1 sqlite-3.3.6-2 sqlite-devel-3.3.6-2 any suggestions ?

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Re: [CentOS] centos 5.0/5.1 nfs kickstart
by Paul Armor 30 Jan '08

30 Jan '08

Hi, On Tue, 29 Jan 2008, Adam Miller wrote: > According to these docs an MTU can be specified in the kickstart script. It > doesn't say much more than that though. > > http://www.centos.org/docs/5/html/Installation_Guide-en-US/s1-kickstart2-op… > > The reason for nfs and an mtu of 4500 is complicated and not in my control. > This is being used in a beowulf cluster environment. > > The process I'm following is currently working for kickstarting Fedora Core 4 > installs, so I am hopeful it will work in centos. > > Adam Getting this thread back on track... The problem seems to be that when syslinux hands over control to the anaconda image, anaconda (specifically /sbin/loader) blows away the mtu... I'm guessing that it actually does set the mtu, then resets the interface (in our case, a broacom 5704 using tg3) and thus instantly forgets the mtu change. If in the syslinux kernel args I pass a static ip/netmask/mtu to the kernel, it works appropriately. Oddly, when starting the kickstart, after the ks.cfg file it will dhcp AND it seems remember the mtu setting. Thanks, Paul

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