Discuss February 2008

discuss@lists.centos.org

286 participants
340 discussions

Re: [CentOS] how to uninstall
by Ross S. W. Walker 28 Feb '08

28 Feb '08

Jim, Try out 'alternatives' for managing symlinks to prefixed installs, especially if you have multiple versions. Works like a charm and can be used to fix/remove links later. -Ross ----- Original Message ----- From: centos-bounces(a)centos.org <centos-bounces(a)centos.org> To: CentOS mailing list <centos(a)centos.org> Sent: Thu Feb 28 04:13:35 2008 Subject: Re: [CentOS] how to uninstall > when i install a package without the rpm tool cause its not rpm > package like configure , make , make install > > how can i uninstall it later ? If possible, configure it using --prefix so that everything belonging to it gets installed in the same place, which will make removing it easy. I prefer to install into /usr/local/<application>/<version> so that I can retain old versions while installing a new one. There will be some work to do to make executables available in users' paths. I do it by creating a symbolic link 'current' pointing to the current version, and making links of the contents of current's bin (in terms of current so that they don't change when I switch versions) in /usr/local/bin. GNU Stow (http://www.gnu.org/software/stow/), not that I use it, has formalised this approach: GNU Stow helps the sysadmin organise files under /usr/local/ by allowing each piece of software to be installed in its own tree under /usr/local/stow/, and then using symlinks to create the illusion that all the software is installed in the same place. Jim _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.

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CentOS-announce Digest, Vol 36, Issue 15
by centos-announce-request＠centos.org 28 Feb '08

28 Feb '08

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2008:0153 Important CentOS 4 ia64 cups - security update (Pasi Pirhonen) 2. CESA-2008:0161 Important CentOS 4 ia64 cups - security update (Pasi Pirhonen) 3. CESA-2008:0153 Important CentOS 3 s390(x) cups - security update (Pasi Pirhonen) 4. CESA-2008:0161 Important CentOS 4 s390(x) cups - security update (Pasi Pirhonen) 5. CESA-2008:0155 Important CentOS 3 i386 ghostscript - security update (Tru Huynh) 6. CESA-2008:0155 Important CentOS 3 x86_64 ghostscript - security update (Tru Huynh) 7. CESA-2008:0131 Moderate CentOS 3 i386 netpbm - security update (Tru Huynh) 8. CESA-2008:0131 Moderate CentOS 3 x86_64 netpbm - security update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Wed, 27 Feb 2008 20:57:36 +0200 From: Pasi Pirhonen <upi(a)centos.fi> Subject: [CentOS-announce] CESA-2008:0153 Important CentOS 4 ia64 cups - security update To: centos-announce(a)centos.org Message-ID: <20080227185736.GQ3950(a)centos.fi> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory 2009:0153 https://rhn.redhat.com/errata/RHSA-2008-0153.html The following updated files have been uploaded and are currently syncing to the mirrors: ia64: updates/ia64/RPMS/cups-1.1.17-13.3.51.ia64.rpm updates/ia64/RPMS/cups-devel-1.1.17-13.3.51.ia64.rpm updates/ia64/RPMS/cups-libs-1.1.17-13.3.51.ia64.rpm -- Pasi Pirhonen - upi(a)iki.fi - http://pasi.pirhonen.eu/ Top-postings silently ignored

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Find user accounts with uid > 500
by Sean Carolan 28 Feb '08

28 Feb '08

Hi all: I'm doing an audit of some Linux machines, and have used this awk one-liner to find accounts with uid > 499: awk -F: '{if ($3 > 499) print $0}' < /etc/passwd It works great if you run it on a host directly, but if I try to ssh to a remote host and run the command it fails: mybox$ ssh servername awk -F: '{if ($3 > 499) print $0}' < /etc/passwd bash: -c: line 1: syntax error near unexpected token `(' bash: -c: line 1: `awk -F: {if ($3 > 499) print $0}' I tried wrapping the command in quotes but no luck. Any suggestions? I want to put this into a for loop so I can grab the info from multiple machines. thanks Sean

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Re: [CentOS] Yum not updating kernel
by Bob Taylor 28 Feb '08

28 Feb '08

It seems everybody is out of ideas why yum is not updating the kernel. The following kernels are installed in /boot: vmlinuz-2.6.18-8.1.14.el5 vmlinuz-2.6.18-8.el5 I originally installed CentOS 5.0 via CD. Yum automatically updated to 5.1 including kernel-2.6.18-8.1.14.el5. I have traced the kernels from kernel-2.6.18-8.el5 to kernel-2.6.18-8.1.14.el5. Yum stopped updating at this point. kernel-2.6.18-8.1.14.el5 was installed Oct 10, 2007 according to yum.log. It seems I installed rpmforge.repo around October 13, 2007. The installation included two files. rpmforge.repo and mirrors-rpmforge. The contents of rpmforge.repo is: # Name: RPMforge RPM Repository for Red Hat Enterprise 5 - dag # URL: http://rpmforge.net/ [rpmforge] name = Red Hat Enterprise $releasever - RPMforge.net - dag #baseurl = http://apt.sw.be/redhat/el5/en/$basearch/dag mirrorlist = http://apt.sw.be/redhat/el5/en/mirrors-rpmforge #mirrorlist = file:///etc/yum.repos.d/mirrors-rpmforge enabled = 1 priority = 99 protect = 0 gpgkey = file:///etc/pki/rpm-gpg/RPM-GPG-KEY-rpmforge-dag gpgcheck = 1 Other than the priority is not needed, does any of the previous ring a bell? Still frustrated. I received the following this morning: /etc/cron.daily/yum.cron: Error: Cannot find a valid baseurl for repo: base Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=i386&repo=os error was [Errno 14] HTTP Error 505: DNS lookup error Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=5&arch=i386&repo=os error was [Errno 14] HTTP Error 506: Failure To Connect To Web Server Has CentOS.org changed their url? -- Bob Taylor

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smokeping on CentOS questions
by Rogelio 28 Feb '08

28 Feb '08

I'm having some problems getting CentOS to serve up my Smokeping pages ( http://oss.oetiker.ch/smokeping/) However, I'm having problems getting the pages to serve up correctly. Here is a quick run down of what I've done. (1) wget and untar to /usr/local/smokeping (2) chown -R root:root /usr/local/smokeping (3) modifying to the following files to reflect my environment (not sure if all my steps here were good) /usr/local/smokeping/bin/smokeping /usr/local/smokepoing/htdocs/smokeping.cfg (4) ln -s /usr/local/smokeping/htdocs /var/www/html/smokeping When I go to "www.mybox.com/smokeping", all I get is a list of files, not the webpage I would expect to get. What might I be doing wrong?

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Networking problems with fresh install
by Chuck Campbell 28 Feb '08

28 Feb '08

I just did a fresh install of centos 5.0 from cd, followed by yum update which installed 399 packages. No failures or errors that I can see. I have three nics in the box, but am only setting up one at the moment. The box can ping others in my network, but if I try ssh, telnet, ftp, etc I get this: [root@cm network-scripts]# ftp watchdog ftp: connect: No route to host ftp> [root@cm sysconfig]# ftp 172.17.2.242 ftp: connect: No route to host root@cm network-scripts]# telnet watchdog Trying 172.17.2.242... telnet: connect to address 172.17.2.242: No route to host telnet: Unable to connect to remote host: No route to host [root@cm network-scripts]# ssh -l campbell watchdog ssh: connect to host watchdog port 22: No route to host The weird part is I can do this: [root@cm network-scripts]# ping watchdog PING watchdog (172.17.2.242) 56(84) bytes of data. 64 bytes from watchdog (172.17.2.242): icmp_seq=1 ttl=64 time=0.170 ms 64 bytes from watchdog (172.17.2.242): icmp_seq=2 ttl=64 time=0.145 ms 64 bytes from watchdog (172.17.2.242): icmp_seq=3 ttl=64 time=0.135 ms --- watchdog ping statistics --- 3 packets transmitted, 3 received, 0% packet loss, time 1998ms rtt min/avg/max/mdev = 0.135/0.150/0.170/0.014 ms [root@cm network-scripts]# arp watchdog Address HWtype HWaddress Flags Mask Iface watchdog ether 00:16:76:D1:67:F2 C eth0 and I can do this: [root@cm sysconfig]# ssh -l campbell cs1 campbell@cs1's password: .................... and it will connect fine. output of netstat -rn: [root@cm network-scripts]# netstat -rn Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 172.17.2.0 0.0.0.0 255.255.255.0 U 0 0 0 eth0 192.168.122.0 0.0.0.0 255.255.255.0 U 0 0 0 virbr0 169.254.0.0 0.0.0.0 255.255.0.0 U 0 0 0 eth0 0.0.0.0 172.17.2.1 0.0.0.0 UG 0 0 0 eth0 output of netstat -r: [root@cm network-scripts]# netstat -r Kernel IP routing table Destination Gateway Genmask Flags MSS Window irtt Iface 172.17.2.0 * 255.255.255.0 U 0 0 0 eth0 192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0 default gateway 0.0.0.0 UG 0 0 0 eth0 output of route: [root@cm network-scripts]# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 172.17.2.0 * 255.255.255.0 U 0 0 0 eth0 192.168.122.0 * 255.255.255.0 U 0 0 0 virbr0 169.254.0.0 * 255.255.0.0 U 0 0 0 eth0 default gateway 0.0.0.0 UG 0 0 0 eth0 here are the relevant files as far as I know: /etc/hosts [root@cm network-scripts]# more /etc/hosts # Do not remove the following line, or various programs # that require network functionality will fail. 127.0.0.1 localhost.localdomain localhost ::1 localhost6.localdomain6 localhost6 172.17.2.1 gateway gateway.inexs.com 172.17.2.50 cm cm.inexs.com #172.17.2.52 cm2 cm2.inexs.com 172.17.2.51 cs1 cs1.inexs.com #172.17.2.53 cs2 cs2.inexs.com 172.17.2.137 ingrid ingrid.inexs.com 172.17.2.161 vail vail.inexs.com 172.17.2.162 beaver beaver.inexs.com 172.17.2.175 plotting plotting.inexs.com 172.17.2.242 watchdog watchdog.inexs.com /etc/sysconfig/network-scripts/ifcfg-eth0 [root@cm network-scripts]# more ifcfg-eth0 # Broadcom Corporation NetXtreme BCM5704 Gigabit Ethernet DEVICE=eth0 BOOTPROTO=none BROADCAST=172.17.2.255 HWADDR=00:e0:81:2c:73:86 ONBOOT=yes DHCP_HOSTNAME=cm TYPE=Ethernet IPADDR=172.17.2.50 NETMASK=255.255.255.0 NETWORK=172.17.2.0 GATEWAY=172.17.2.1 USERCTL=yes IPV6INIT=no PEERDNS=no PEERNTP=no /etc/sysconfig/network-scripts/ifcfg-lo [root@cm network-scripts]# more ifcfg-lo DEVICE=lo IPADDR=127.0.0.1 NETMASK=255.0.0.0 NETWORK=127.0.0.0 # If you're having problems with gated making 127.0.0.0/8 a martian, # you can change this to something else (255.255.255.255, for example) #BROADCAST=127.255.255.255 BROADCAST=255.255.255.255 ONBOOT=yes NAME=loopback output of ifconfig -a: eth0 Link encap:Ethernet HWaddr 00:E0:81:2C:73:86 inet addr:172.17.2.50 Bcast:172.17.2.255 Mask:255.255.255.0 inet6 addr: fe80::2e0:81ff:fe2c:7386/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:27358 errors:0 dropped:0 overruns:0 frame:0 TX packets:4252 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2338646 (2.2 MiB) TX bytes:620434 (605.8 KiB) eth1 Link encap:Ethernet HWaddr 00:E0:81:2C:73:87 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:19 eth2 Link encap:Ethernet HWaddr 00:E0:81:2C:74:33 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) 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:1828 errors:0 dropped:0 overruns:0 frame:0 TX packets:1828 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:2737876 (2.6 MiB) TX bytes:2737876 (2.6 MiB) peth0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:27358 errors:0 dropped:0 overruns:0 frame:0 TX packets:4255 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2448018 (2.3 MiB) TX bytes:640420 (625.4 KiB) Interrupt:18 sit0 Link encap:IPv6-in-IPv4 NOARP MTU:1480 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) veth1 Link encap:Ethernet HWaddr 00:00:00:00:00:00 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) veth2 Link encap:Ethernet HWaddr 00:00:00:00:00:00 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) veth3 Link encap:Ethernet HWaddr 00:00:00:00:00:00 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:4252 errors:0 dropped:0 overruns:0 frame:0 TX packets:27358 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:620434 (605.8 KiB) TX bytes:2338646 (2.2 MiB) vif0.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vif0.2 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vif0.3 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vif0.0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::fcff:ffff:feff:ffff/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:4252 errors:0 dropped:0 overruns:0 frame:0 TX packets:27358 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:620434 (605.8 KiB) TX bytes:2338646 (2.2 MiB) vif0.1 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vif0.2 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vif0.3 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF 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:0 RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) virbr0 Link encap:Ethernet HWaddr 00:00:00:00:00:00 inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:40 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:0 (0.0 b) TX bytes:8674 (8.4 KiB) xenbr0 Link encap:Ethernet HWaddr FE:FF:FF:FF:FF:FF inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link UP BROADCAST RUNNING NOARP MTU:1500 Metric:1 RX packets:21327 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:1523795 (1.4 MiB) TX bytes:0 (0.0 b) /etc/sysconfig/network [root@cm sysconfig]# more network NETWORKING=yes NETWORKING_IPV6=no HOSTNAME=cm /etc/resolv.conf [root@cm sysconfig]# more /etc/resolv.conf nameserver 216.201.128.10 nameserver 66.196.216.10 /etc/sysconfig/iptables [root@cm sysconfig]# more iptables # Firewall configuration written by system-config-securitylevel # Manual customization of this file is not recommended. *filter :INPUT ACCEPT [0:0] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [0:0] :RH-Firewall-1-INPUT - [0:0] -A INPUT -j RH-Firewall-1-INPUT -A FORWARD -j RH-Firewall-1-INPUT -A RH-Firewall-1-INPUT -i lo -j ACCEPT -A RH-Firewall-1-INPUT -p icmp --icmp-type any -j ACCEPT -A RH-Firewall-1-INPUT -p 50 -j ACCEPT -A RH-Firewall-1-INPUT -p 51 -j ACCEPT -A RH-Firewall-1-INPUT -p udp --dport 5353 -d 224.0.0.251 -j ACCEPT -A RH-Firewall-1-INPUT -p udp -m udp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -p tcp -m tcp --dport 631 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 21 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 25 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 2049 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 137 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m udp -p udp --dport 138 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 139 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 445 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 443 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 23 -j ACCEPT -A RH-Firewall-1-INPUT -m state --state NEW -m tcp -p tcp --dport 80 -j ACCEPT -A RH-Firewall-1-INPUT -j REJECT --reject-with icmp-host-prohibited COMMIT -- ACCEL Services, Inc.| Specialists in Gravity, Magnetics | (713)993-0671 ph. | and Integrated Interpretation | (713)993-0608 fax 633 1/2 W. 21st St.| Since 1992 | (713)306-5794 cell Houston, TX, 77008 | Chuck Campbell | campbell(a)accelinc.com | President & Senior Geoscientist | "Integration means more than having all the maps at the same scale!"

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NFSroot is acting strange in CentOS5
by vincenzo romero 27 Feb '08

27 Feb '08

Hello all, I have observed a problem with a diskless PXE client I am attempting to configure. PXE/NFS/DHCP/TFTPd server is running CentOS5.1 and the Diskless workstation's root and kernel was extracted from a CentOS5.1 (custom kernel due to setting to enable Root File System support). Problem: When the diskless client boots and logs in I notice that my root user is being squashed, even if I have exported the root with the "no_root_squash" option. The exports file contains this line: /export/images *(rw,no_root_squash,no_subtree_check) 1. Creating a file as root gives it nobody permission: rw-r--r-- 1 65534 65534 0 Feb 26 16:30 foo 2. When I explicitly mount the same export from the booted workstation and create another file; this time, it is created as root: -rw-r--r-- 1 root root 0 Feb 26 16:31 bar 3. I checked the /proc/mounts and notice there are differences in the NFS options it has accepted during mount: rootfs / rootfs rw 0 0 /dev/root / nfs rw,vers=2,rsize=4096,wsize=4096,hard,nolock,proto=udp,timeo=11,retrans=2,sec=null,addr=192.16.10.5 0 0 192.16.10.5:/tftpboot /mnt/test nfs rw,vers=3,rsize=32768,wsize=32768,hard,proto=tcp,timeo=600,retrans=2,sec=sys,addr=192.168.16.5 0 0 4. I try to append NFS options to my APPEND line to force: NFS version3, change r/wsize, use tcp protocol and change the sec from null to sys (null seems to be the parameter that affects the NFS ownership/permission). My /tftpboot/pxelinux.cfg/default file contains the following: nfsroot=192.168.16.5:/export/images/centos51_x86-64,nfsversvers=3,tcp,rsize=32768,wsize=32768,sec=sys ip=dhcp 5. All options are honored except for the "sec=sys" option. Below is the output of the /proc/cmdline: /proc/cmdline: root=/dev/nfs rw nfsroot=192.168.16.5:/export/images/centos51_x86-64,nfsvers=3,tcp,rsize=32768,wsize=32768,sec=sys ip=dhcp BOOT_IMAGE=vmlinuz-2.6.18-custom-2.6.18-53.el5 6. But the /proc/mounts shows that the "sec=" parameter is still set to NULL. /proc/mounts: rootfs / rootfs rw 0 0 /dev/root / nfs rw,vers=3,rsize=3278,wsize=3478,hard,nolock,proto=tcp,timeo=11,retrans=2,sec=null,addr=192.168.16.5 0 0 ............ Kernel versions: PXE server --> uname -a Linux qatest1 2.6.18-53.1.13.el5xen #1 SMP Tue Feb 12 13:33:07 EST 2008 x86_64 x86_64 x86_64 GNU/Linux Diskless Workstation's kernel and root are extracted from this: Linux localhost.localdomain 2.6.18-custom-2.6.18-53.el5 #1 SMP Wed Feb 20 08:45:23 PST 2008 x86_64 x86_64 x86_64 GNU/Linux Any help would be greatly appreciated. -- best, Vince

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OT: Thunderbird2 for 64 bits
by carlopmart 27 Feb '08

27 Feb '08

Hi all, Somebody knows from where can I download 64 bits version of Thunderbird2?? In mozilla's website only 32 bits exists. Thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

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bash - safely pass untrusted strings?
by Benjamin Smith 27 Feb '08

27 Feb '08

In bash, given a string assignment as follows, how do I "add slashes" automagically, so that it can be safely passed to another program? Notice that the assignment contains spaces, single-quotes and double-quotes, maybe god-only-knows-what-else. It's untrusted data. Yet I need to pass it all *safely*. The appropriate function in PHP is addslashes(); but what is the bash equivalent? EG: #! /bin/sh A="This isn't a \"parameter\""; B=`/path/to/somecommand.sh $A`; exit 0; Thanks, -Ben -- Only those who reach toward a goal are likely to achieve it. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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Pointer to simple mail server setup?
by Steve Snyder 27 Feb '08

27 Feb '08

Hello. I need to set up a mail server for a small (~5 people) organization on CentOS 5.1. While I am very familiar with CentOS and Linux in general, I have zero experience in setting up a POP3(s)/SMTP mail server. I suppose eventually I'd like to do spam/virus filtering, but initially the simple sending/receiving of mail will be adequate. Can someone point me to a tutorial on setting up a mail server on CentOS 5? Thanks.

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Discuss February 2008