dhclient hook not overwritten /etc/resolv.conf
Hi, My OS is Centos7. I add a bash script dns.sh in /etc/dhcp/dhclient-exit-hooks.d . The script content is #!/bin/bash echo “nameserver 1.1.1.1” >> /etc/resolv.conf I want to append a nameserver in /etc/resove.conf. However, when I restart network. /etc/resove.conf not changed. /etc/resove.conf.save append this line. Why happens that? How can I append a nameserver in /etc/resove.conf? Zhengyu Best Wishes 如果您错误接收了该邮件，请通过电子邮件立即通知我们。请回复邮件到 hqs-s...@chinaunicom.cn，即可以退订此邮件。我们将立即将您的信息从我们的发送目录中删除。 If you have received this email in error please notify us immediately by e-mail. Please reply to hqs-s...@chinaunicom.cn ,you can unsubscribe from this mail. We will immediately remove your information from send catalogue of our. ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Changes BIND 9.15+ source distribution (gz -> xz, and SHA1 deprecation)
Hi, the BIND 9 development team has decided to change the compression method for BIND 9.15.7, and also for the next BIND 9.16.0 release to widely available **xz** compression algorithm. Therefore, the tarball extension has changed from https://downloads.isc.org/isc/bind9/9.15.7/bind-9.15.7.tar.gz to https://downloads.isc.org/isc/bind9/9.15.7/bind-9.15.7.tar.xz xz offers considerable savings in terms of disk space and thus network traffic and the tool is available in the base system for most if not all Linux and BSD distributions. The previous versions of BIND 9 (9.11 and 9.14) are still distributed compressed with gzip. The other change we will introduce early next year (timed with BIND 9.16.0 release) is the deprecation of SHA1 checksums. The MD based algorithms are no longer collision resistant enough and henceforth the SHA1 based checksums no longer bear any real value. Ondrej -- Ondřej Surý ond...@isc.org ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: dhclient hook not overwritten /etc/resolv.conf
Am 19.12.19 um 10:01 schrieb Zhengyu Pan: > My OS is Centos7. I add a bash script dns.sh in > /etc/dhcp/dhclient-exit-hooks.d . The script content is > > #!/bin/bash > echo“nameserver1.1.1.1”>>/etc/resolv.conf > > I want to append a nameserver in /etc/resove.conf. > However, when I restart network. /etc/resove.conf not changed. > /etc/resove.conf.save append this line. > Why happens that? How can I append a nameserver in /etc/resove.conf? not a named qurstion at all, however becasue something overwrote /etc/resolv.conf after your script which maybe means your script runs way too early chattr +i /etc/resove.conf under normal conditions chattr -i /etc/resove.conf at the start of your script chattr +i /etc/resove.conf at the end of your script https://www.tecmint.com/chattr-command-examples/ this is a supported way to prevent resolv.conf overwritten by whatever stuff running on the system, be it dhclient, networkmanager or another smartass stuff which lives in a authistic world pretend to know what my nameservers are ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: dhclient hook not overwritten /etc/resolv.conf
Sorry. I sent wrong mailing group. chattr not worked. It prompted: Shutting down inteface eth0: chattr:Operation not permitted while setting flags on /etc/resolv.conf. > 2019年12月19日 下午5:28，Reindl Harald 写道： > > > > Am 19.12.19 um 10:01 schrieb Zhengyu Pan: >> My OS is Centos7. I add a bash script dns.sh in >> /etc/dhcp/dhclient-exit-hooks.d . The script content is >> >> #!/bin/bash >> echo“nameserver1.1.1.1”>>/etc/resolv.conf >> >> I want to append a nameserver in /etc/resove.conf. >> However, when I restart network. /etc/resove.conf not changed. >> /etc/resove.conf.save append this line. >> Why happens that? How can I append a nameserver in /etc/resove.conf? > > not a named qurstion at all, however > > becasue something overwrote /etc/resolv.conf after your script which > maybe means your script runs way too early > > chattr +i /etc/resove.conf under normal conditions > > chattr -i /etc/resove.conf at the start of your script > chattr +i /etc/resove.conf at the end of your script > > https://www.tecmint.com/chattr-command-examples/ > > this is a supported way to prevent resolv.conf overwritten by whatever > stuff running on the system, be it dhclient, networkmanager or another > smartass stuff which lives in a authistic world pretend to know what my > nameservers are > ___ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users 如果您错误接收了该邮件，请通过电子邮件立即通知我们。请回复邮件到 hqs-s...@chinaunicom.cn，即可以退订此邮件。我们将立即将您的信息从我们的发送目录中删除。 If you have received this email in error please notify us immediately by e-mail. Please reply to hqs-s...@chinaunicom.cn ,you can unsubscribe from this mail. We will immediately remove your information from send catalogue of our. ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
RE: dhclient hook not overwritten /etc/resolv.conf
Hi Zhengyu Pan
Have you tried to put this nameserver address in dhclient.conf?
>From man dhclient.conf
append { [option declaration] [, ... option declaration] }
If for some set of options the client should first use the values
supplied by the server, if any, and then use values you supply,
these values can be defined in the append statement. The append
statement can only be used for options which allow more than one
value to be given. This restriction is not enforced - if you
ignore it, the behaviour will be unpredictable.
I haven’t use the ap- or prepend options, but the supersede option work like a
charm (at least on FreeBSD)
/BR
Philippe
From: bind-users On Behalf Of Zhengyu
Pan(???)
Sent: Thursday, December 19, 2019 10:01 AM
To: bind-users@lists.isc.org
Subject: dhclient hook not overwritten /etc/resolv.conf
Hi,
My OS is Centos7. I add a bash script dns.sh in /etc/dhcp/dhclient-exit-hooks.d
. The script content is
#!/bin/bash
echo “nameserver 1.1.1.1” >> /etc/resolv.conf
I want to append a nameserver in /etc/resove.conf.
However, when I restart network. /etc/resove.conf not changed.
/etc/resove.conf.save append this line.
Why happens that? How can I append a nameserver in /etc/resove.conf?
Zhengyu
Best Wishes
如果您错误接收了该邮件，请通过电子邮件立即通知我们。请回复邮件到 hqs-s...@chinaunicom.cn
，即可以退订此邮件。我们将立即将您的信息从我们的发送目录中删除。 If you have received this email in error
please notify us immediately by e-mail. Please reply to hqs-s...@chinaunicom.cn
,you can unsubscribe from this mail. We will
immediately remove your information from send catalogue of our.
___
Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe
from this list
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bind-users@lists.isc.org
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Re: dhclient hook not overwritten /etc/resolv.conf
Am 19.12.19 um 10:58 schrieb Zhengyu Pan: > Sorry. I sent wrong mailing group. > chattr not worked. It prompted: > Shutting down inteface eth0: chattr:Operation not permitted while setting > flags on /etc/resolv.conf. the opposite is true it proves *that* it worked but waht can#t wrk i when you for whatever reason need or believe to ned the dynamic nameservers but that don't make sense anyways having dozens of namservers in /etc/resolv.conf with your wished ones at the bottom is useless because it won't be questioned at all as long the first in teh list are responding >> 2019年12月19日 下午5:28，Reindl Harald 写道： >> Am 19.12.19 um 10:01 schrieb Zhengyu Pan: >>> My OS is Centos7. I add a bash script dns.sh in >>> /etc/dhcp/dhclient-exit-hooks.d . The script content is >>> >>> #!/bin/bash >>> echo“nameserver1.1.1.1”>>/etc/resolv.conf >>> >>> I want to append a nameserver in /etc/resove.conf. >>> However, when I restart network. /etc/resove.conf not changed. >>> /etc/resove.conf.save append this line. >>> Why happens that? How can I append a nameserver in /etc/resove.conf? >> >> not a named qurstion at all, however >> >> becasue something overwrote /etc/resolv.conf after your script which >> maybe means your script runs way too early >> >> chattr +i /etc/resove.conf under normal conditions >> >> chattr -i /etc/resove.conf at the start of your script >> chattr +i /etc/resove.conf at the end of your script >> >> https://www.tecmint.com/chattr-command-examples/ >> >> this is a supported way to prevent resolv.conf overwritten by whatever >> stuff running on the system, be it dhclient, networkmanager or another >> smartass stuff which lives in a authistic world pretend to know what my >> nameservers are ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: dhclient hook not overwritten /etc/resolv.conf
Thanks.
I have tried append prepend and supersede option. They are ok for ipv4 name
server. But It doesn’t work for ipv6 name server.
Zhengyu
2019年12月19日 下午6:16，Philippe Maechler
mailto:pmaechler...@glattnet.ch>> 写道：
Hi Zhengyu Pan
Have you tried to put this nameserver address in dhclient.conf?
From man dhclient.conf
append { [option declaration] [, ... option declaration] }
If for some set of options the client should first use the values
supplied by the server, if any, and then use values you supply,
these values can be defined in the append statement. The append
statement can only be used for options which allow more than one
value to be given. This restriction is not enforced - if you
ignore it, the behaviour will be unpredictable.
I haven’t use the ap- or prepend options, but the supersede option work like a
charm (at least on FreeBSD)
/BR
Philippe
From: bind-users
mailto:bind-users-boun...@lists.isc.org>> On
Behalf Of Zhengyu Pan(???)
Sent: Thursday, December 19, 2019 10:01 AM
To: bind-users@lists.isc.org
Subject: dhclient hook not overwritten /etc/resolv.conf
Hi,
My OS is Centos7. I add a bash script dns.sh in /etc/dhcp/dhclient-exit-hooks.d
. The script content is
#!/bin/bash
echo “nameserver 1.1.1.1” >> /etc/resolv.conf
I want to append a nameserver in /etc/resove.conf.
However, when I restart network. /etc/resove.conf not changed.
/etc/resove.conf.save append this line.
Why happens that? How can I append a nameserver in /etc/resove.conf?
Zhengyu
Best Wishes
如果您错误接收了该邮件，请通过电子邮件立即通知我们。请回复邮件到
hqs-s...@chinaunicom.cn，即可以退订此邮件。我们将立即将您的信息从我们的发送目录中删除。
If you have received this email in error please notify us immediately by
e-mail. Please reply to hqs-s...@chinaunicom.cn
,you can unsubscribe from this mail. We will immediately remove your
information from send catalogue of our.
如果您错误接收了该邮件，请通过电子邮件立即通知我们。请回复邮件到
hqs-s...@chinaunicom.cn，即可以退订此邮件。我们将立即将您的信息从我们的发送目录中删除。 If you have received
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hqs-s...@chinaunicom.cn ,you can unsubscribe from this mail. We will
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___
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Re: dhclient hook not overwritten /etc/resolv.conf
I only want to prepend only a IPv6 nameserver. Other ns are added by users. Zhengyu Thanks. > 2019年12月19日 下午6:32，Reindl Harald 写道： > > > > Am 19.12.19 um 10:58 schrieb Zhengyu Pan: >> Sorry. I sent wrong mailing group. >> chattr not worked. It prompted: >> Shutting down inteface eth0: chattr:Operation not permitted while setting >> flags on /etc/resolv.conf. > > the opposite is true > > it proves *that* it worked but waht can#t wrk i when you for whatever > reason need or believe to ned the dynamic nameservers > > but that don't make sense anyways > > having dozens of namservers in /etc/resolv.conf with your wished ones at > the bottom is useless because it won't be questioned at all as long the > first in teh list are responding > >>> 2019年12月19日 下午5:28，Reindl Harald 写道： >>> Am 19.12.19 um 10:01 schrieb Zhengyu Pan: My OS is Centos7. I add a bash script dns.sh in /etc/dhcp/dhclient-exit-hooks.d . The script content is #!/bin/bash echo“nameserver1.1.1.1”>>/etc/resolv.conf I want to append a nameserver in /etc/resove.conf. However, when I restart network. /etc/resove.conf not changed. /etc/resove.conf.save append this line. Why happens that? How can I append a nameserver in /etc/resove.conf? >>> >>> not a named qurstion at all, however >>> >>> becasue something overwrote /etc/resolv.conf after your script which >>> maybe means your script runs way too early >>> >>> chattr +i /etc/resove.conf under normal conditions >>> >>> chattr -i /etc/resove.conf at the start of your script >>> chattr +i /etc/resove.conf at the end of your script >>> >>> https://www.tecmint.com/chattr-command-examples/ >>> >>> this is a supported way to prevent resolv.conf overwritten by whatever >>> stuff running on the system, be it dhclient, networkmanager or another >>> smartass stuff which lives in a authistic world pretend to know what my >>> nameservers are > ___ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users 如果您错误接收了该邮件，请通过电子邮件立即通知我们。请回复邮件到 hqs-s...@chinaunicom.cn，即可以退订此邮件。我们将立即将您的信息从我们的发送目录中删除。 If you have received this email in error please notify us immediately by e-mail. Please reply to hqs-s...@chinaunicom.cn ,you can unsubscribe from this mail. We will immediately remove your information from send catalogue of our. ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
Re: dhclient hook not overwritten /etc/resolv.conf
You need to ask on your distro user support forum and not here. This topic is beyond the subject of this list as it could include all kinds of integrations that your distribution provides. This is not a bind-users topic. Ondrej -- Ondřej Surý ond...@isc.org > On 19 Dec 2019, at 11:41, Zhengyu Pan(联通集团联通云数据有限公司本部) > wrote: > > I only want to prepend only a IPv6 nameserver. Other ns are added by users. > > Zhengyu > Thanks. > >> 2019年12月19日 下午6:32，Reindl Harald 写道： >> >> >> >> Am 19.12.19 um 10:58 schrieb Zhengyu Pan: >>> Sorry. I sent wrong mailing group. >>> chattr not worked. It prompted: >>> Shutting down inteface eth0: chattr:Operation not permitted while setting >>> flags on /etc/resolv.conf. >> >> the opposite is true >> >> it proves *that* it worked but waht can#t wrk i when you for whatever >> reason need or believe to ned the dynamic nameservers >> >> but that don't make sense anyways >> >> having dozens of namservers in /etc/resolv.conf with your wished ones at >> the bottom is useless because it won't be questioned at all as long the >> first in teh list are responding >> 2019年12月19日 下午5:28，Reindl Harald 写道： Am 19.12.19 um 10:01 schrieb Zhengyu Pan: > My OS is Centos7. I add a bash script dns.sh in > /etc/dhcp/dhclient-exit-hooks.d . The script content is > > #!/bin/bash > echo“nameserver1.1.1.1”>>/etc/resolv.conf > > I want to append a nameserver in /etc/resove.conf. > However, when I restart network. /etc/resove.conf not changed. > /etc/resove.conf.save append this line. > Why happens that? How can I append a nameserver in /etc/resove.conf? not a named qurstion at all, however becasue something overwrote /etc/resolv.conf after your script which maybe means your script runs way too early chattr +i /etc/resove.conf under normal conditions chattr -i /etc/resove.conf at the start of your script chattr +i /etc/resove.conf at the end of your script https://www.tecmint.com/chattr-command-examples/ this is a supported way to prevent resolv.conf overwritten by whatever stuff running on the system, be it dhclient, networkmanager or another smartass stuff which lives in a authistic world pretend to know what my nameservers are >> ___ >> Please visit https://lists.isc.org/mailman/listinfo/bind-users to >> unsubscribe from this list >> >> bind-users mailing list >> bind-users@lists.isc.org >> https://lists.isc.org/mailman/listinfo/bind-users > > 如果您错误接收了该邮件，请通过电子邮件立即通知我们。请回复邮件到 > hqs-s...@chinaunicom.cn，即可以退订此邮件。我们将立即将您的信息从我们的发送目录中删除。 If you have received > this email in error please notify us immediately by e-mail. Please reply to > hqs-s...@chinaunicom.cn ,you can unsubscribe from this mail. We will > immediately remove your information from send catalogue of our. > ___ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users ___ Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe from this list bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
