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从 RHEL 6 升级至 RHEL 7
REDHAT ENTERPRISELINUX7把 Red Hat Enterprise Linux 6 原位（in-place）升级到 Red Hat Enterprise Linux 7RedHatCustomer Content Services法律通告摘要本文档提供了有关如何执行把 Red Hat Enterprise Linux（RHEL）6 原位升级到 RHEL 7 的步骤。在原位升级过程中，现有 RHEL 6 操作系统被 RHEL 7 替换。前言本文档论述了...转载 2022-05-18 13:59:12 · 1306 阅读 · 0 评论 -
RHEL6 EUS Repo does not contain latest packages
Hi,I have a "Red Hat Developer Subscription" and just purchased an " Extended Update Support" subscription. I've attached the subscription to my system but it seems I don't get the latest packages. I've already tried re-subscribing but that doesn't help.转载 2021-02-01 12:21:04 · 603 阅读 · 0 评论 -
How can I download or install debuginfo packages for RHEL systems?
环境Red Hat Enterprise Linux Red Hat Customer Portal Red Hat Network (RHN) Red Hat Satellite问题How do I downloaddebuginfopackages? How to download debug-info packages like kernel-debuginfo? Why are debug info packages for Red Hat Enterprise Linux ..转载 2021-02-01 12:18:57 · 653 阅读 · 0 评论 -
产品签注（GPG）密钥
产品签注（GPG）密钥我们使用大量 GPG 密钥为我们的软件包签注。所需公钥均包含着相关产品中，并用来自动验证 软件更新。您还可以使用本页中的密钥 手动验证这些软件包。运行以下命令为 Red Hat 产品验证 RPM 软件包：rpm --checksig -v <filename>.rpm这个命令的输出结果显示该软件包是否由签名，以及使用 什么密钥签注。发布软件包签注请不要使用软件包签注密钥为电子邮件信息加密。有关进行安全沟通的信息请参考安全响应团队及步骤。fd43转载 2021-02-01 12:11:45 · 775 阅读 · 0 评论 -
How to allow users with no password to login with SSH ?
环境Red Hat Enterprise Linux 4/5问题How to allow users with no password to login with SSH ?决议By default, sshd will not allows login to accounts with empty password. To allow such logins, set the following in /etc/ssh/sshd_configRawPermitEmptyPassw转载 2020-12-16 13:05:41 · 194 阅读 · 0 评论 -
Server hangs with message "uhci_hcd XXXX:XX:XX:.X: Unlink after no-IRQ? Controller is probably using
环境Red Hat Enterprise Linux 5 HP Proliant 380 G7问题After kernel panic, server was rebooted. During boot process into runlevel 3, it hangs with following message:Raw"uhci_hcd 0000:02:00:.4: Unl...转载 2019-12-02 16:27:36 · 130424 阅读 · 0 评论 -
cron is skipped some runs, leaves error messages in the log 'Job execution of per-minute job schedul
环境Red Hat Enterprise Linux问题 Cron is skipped some runs, leaves following messages in the log Raw May 3 08:46:01 crond[12709]: (admin) error: Job execution of per-minute job scheduled f...转载 2019-12-02 16:06:01 · 929 阅读 · 0 评论 -
sshd fail with mm_request_send: write: Broken pipe
环境Red Hat Enterprise Linux Server 6问题Lost connection to server through ssh. Following error observed in/var/log/securefile.Rawsshd[24640]: fatal: mm_request_send: write: Broken pipe决议...转载 2019-12-02 15:53:46 · 490 阅读 · 0 评论 -
Does /etc/hosts.allow and /etc/hosts.deny have any use whatsoever in RHEL 8?
环境Red Hat Enterprise Linux (RHEL) 8 tcp_wrappers firewalld问题/etc/hosts.allowand/etc/hosts.denyare present onRHEL 8Beta system. They are in the setup-2.12.2-1.el8.noarch rpm. What is the pu...转载 2019-10-21 10:56:34 · 436 阅读 · 0 评论 -
What is pam_faillock and how to use it in Red Hat Enterprise Linux ?
环境Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 PAM pam_faillock.so问题What is pam_faillock ? How to implement account lockout policy using pam_faillock.so ? pam_tally is deprecated in ...转载 2019-10-17 16:29:44 · 754 阅读 · 0 评论 -
How to configure pam_tally2 to lock user account after certain number of failed login attempts
环境Red Hat Enterprise Linux 5 (RHEL5) Red Hat Enterprise Linux 6 (RHEL6) Red Hat Enterprise Linux 7 (RHEL7) pam_tally2问题How to configurepam_tally2to lock user account after certain number of ...转载 2019-10-17 15:24:41 · 1190 阅读 · 0 评论 -
redhat 试用
https://www.redhat.com/zh/technologies/linux-platforms/enterprise-linux/try-it?intcmp=701f20000012m1qAAA转载 2019-10-12 17:24:30 · 477 阅读 · 0 评论 -
关于红帽订阅模式的常见问题
政策和准则关于红帽订阅模式的常见问题有关红帽®订阅模式的常见问题解答，包括如何在客户环境中使用产品和服务订阅、为什么优化和续订订阅非常重要。了解红帽订阅如何为确保安全、可靠运行系统提供您所需的一切资源。了解红帽订阅模式什么是红帽订阅模式？红帽订阅模式已经推出 20 多年，并且仍在持续根据客户的意见反馈进行改进和完善。凭借红帽订阅，客户不仅能够下载经过严格测试和认证的红帽企业软...转载 2019-10-12 17:23:09 · 6690 阅读 · 0 评论 -
Red Hat Enterprise Linux Server License
Red Hat Enterprise Linux ServerRed Hat®Enterprise Linux®Server is an easy-to-administer, simple-to-control operating system that can be deployed on physical systems (Self-support, Standard, and Pr...转载 2019-10-12 17:15:57 · 1541 阅读 · 0 评论 -
Installing or updating java-1.7.0-openjdk to java-1.7.0-openjdk-1.7.0.191-2.6.15.4.el6_10 fails in e
EnvironmentRed Hat Enterprise Linux 6 java-1.7.0-openjdk-1.7.0.191-2.6.15.4.el6_10Issue Installing or updating java-1.7.0-openjdk to java-1.7.0-openjdk-1.7.0.191-2.6.15.4.el6_10 fails in error...转载 2019-08-27 22:00:05 · 907 阅读 · 0 评论 -
kernel crash "kernel tried to execute NX-protected page"
环境Red Hat Enterprise Linux 6, 7 RHEL 7 kernel-3.10.0-514.2.2.el7 RHEL 6 kernel-2.6.32-220.13.1.el6 kernel-2.6.32-431.23.3.el6 kernel-2.6.32-504.8.1.el6 问题Server got crashed and reb...转载 2019-08-19 17:15:32 · 2637 阅读 · 0 评论 -
Why after spike detect, most of the time ntp write 'no_sys_peer'?
环境Red Hat Enterprise Linux 6 ntp问题After 'spike_detect' and 'clock step' ntpd writes 'no_sys_peer'. What is the reason and why it write such message?RawMay 6 14:18:19 example.com ntpd[34933]...转载 2019-08-19 17:08:16 · 2574 阅读 · 0 评论 -
What does "spike_detect" ntp messages mean?
环境Red Hat Enterprise Linux (RHEL) 6 ntp问题What does "spike_detect" ntp messages mean? Are the NTP servers failing? Is there any problem with the NTP client?Raw2014-04-10T12:05:08.000+12:00 h...转载 2019-08-19 17:04:30 · 1324 阅读 · 0 评论 -
Missing some ksym when install rpm package
环境Red Hat Enterprise Linux 5.8问题We are using RHEL 5.8 with kernel version 2.6.18-308.el5Our servers model isProLiant BL460c Gen8 Server Bladehowever when we install a package kmod-hp-qla4xxx...转载 2019-08-19 16:58:06 · 773 阅读 · 0 评论 -
udevd worker unexpectedly returned with status 0x0100
环境Red Hat Enterprise Linux(RHEL) 6, several minor versionsudevd问题A host was losing paths to storage which is configured using device mapper multipath and as they came back, a lot of foll转载 2017-05-27 14:58:35 · 7715 阅读 · 0 评论 -
Why is ABRT is deleting the coredumps with the message : "abrtd: Size of '/var/spool/abrt' > = 1000
EnvironmentRed Hat Enterprise Linux 6Red Hat Enterprise Linux 7Automatic Bug Reporting Tool (ABRT)IssueABRT is deleting the coredumps with the message : "abrtd: Size of '/var/spool/abrt' > = 1000 M...转载 2018-05-31 16:20:32 · 2368 阅读 · 0 评论 -
Debugging PAM configuration
BEFORE YOU BEGINMake a backup of your existing system-auth-ac file:Rawmv /etc/pam.d/system-auth-ac{,-orig}cp /etc/pam.d/system-auth-ac{-orig,}This will keep the original with its existing time stamp...转载 2018-05-31 16:19:07 · 907 阅读 · 0 评论 -
All nodes in Oracle RAC cluster reboot when SAN controller fails on Red Hat Enterprise Linux 5.10
EnvironmentRed Hat Enterprise Linux 5.10 with kernel-2.6.18-371.6.1.el5 or later.Oracle RAC 10G environment with two or more nodesOracle RAC's voting disk timeout is 200 secondsDevice-mapper-multipath...转载 2018-05-29 17:59:45 · 725 阅读 · 0 评论 -
第13章 内存管理不足
我们要讨论的VM的最后一个方面是内存不足（OOM）管理器。这故意是一个非常简短的章节，因为它有一个简单的任务; 检查是否有足够的可用内存来满足，验证系统是否真的没有内存，如果是，请选择要杀死的进程。这是虚拟机的一个有争议的部分，有人建议它在很多场合被删除。无论它是否存在于最新的内核中，它仍然是一个有用的系统，因为它触及了许多其他子系统。13.1 检查可用内存对于某些操作，例如使用brk（）覆盖...转载 2018-07-10 13:11:38 · 320 阅读 · 0 评论 -
Why messages like '[rdisc/nm-lndp-rdisc.c:251] send_rs(): (team0.112): cannot send router solicitati
EnvironmentRed Hat Enterprise Linux 7 NetworkManagerIssue What do the following messages in Red Hat Enterprise Linux logging mean? Raw Aug 25 08:59:53 abc NetworkManager[969]: <error>...转载 2018-09-19 12:54:21 · 1756 阅读 · 0 评论 -
Why does the application give an error "/lib64/libc.so.6: version `GLIBC_2.X' not found"?
EnvironmentRed Hat Enterprise Linux (RHEL) 5 Red Hat Enterprise Linux (RHEL) 6 glibc-2.5-X glibc-2.12-XIssueWhy does the application give an error "/lib64/libc.so.6: version `GLIBC_2.X' not fo...转载 2018-10-11 16:57:08 · 483 阅读 · 0 评论 -
Is there any support for glibc 2.14?
EnvironmentRed Hat Enterprise Linux (RHEL) 6.xIssueIs there any support for glibc 2.14? A dynamic library, libnss3.so, is required for an application; however, this appears to be built against v...转载 2018-10-11 16:59:12 · 166 阅读 · 0 评论 -
'multipathd' and disk checker recognizes failed disks later than Oracle ASM
EnvironmentRed Hat Enterprise Linux 5, 6 Oracle ASMIssue We have recognized that the multipathd daemon and the scsi path checker for checking LUNs on an EMC Symmetrix storage box recognizes fai...转载 2018-09-21 13:19:50 · 409 阅读 · 0 评论 -
Getting error: SCSI error: return code = 0x00010000
EnvironmentRed Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7Issue Getting error: 'kernel: sd h:c:t:l: SCSI error: return code = 0x00010000': Raw May 22 23:5...转载 2018-10-17 14:03:39 · 1877 阅读 · 0 评论 -
Message "error while loading shared libraries: /lib64/libc.so.6: ELF file OS ABI invalid" appearing
EnvironmentRed Hat Enterprise Linux 5/6IssueAfter invoking a program, the following error is printed on the screen:Rawerror while loading shared libraries: <library_path>: ELF file OS A...转载 2018-11-21 13:13:18 · 2084 阅读 · 0 评论 -
What is the meaning of "Error 10000 (sugg. bt 0x0, driver bt 0x0, host bt 0x1)"?
EnvironmentRed Hat Enterprise Linux (RHEL) 6 Red Hat Enterprise Linux (RHEL) 5IssueWhat is the meaning of "Error 10000 (sugg. bt 0x0, driver bt 0x0, host bt 0x1)"?ResolutionSee this article h...转载 2018-11-22 11:01:04 · 311 阅读 · 0 评论 -
How do I interpret scsi status messages in RHEL like "sd 2:0:0:243: SCSI error: return code = 0x0800
IssueWhat does "return code = 0xNNNNNNNN" mean, for example 0x08000002 within the following: Raw Oct 23 14:56:25 uname kernel: sdas: Current: sense key: Aborted CommandOct 23 14:56:25 uname ke...转载 2018-11-22 11:01:42 · 5928 阅读 · 0 评论 -
Why do i get the message "kernel: program nmhs is using a deprecated SCSI ioctl, please convert it t
Environment Red Hat Enterprise Linux 5 Oracle RAC Issue Log file shows following message : Raw kernel: program nmhs is using a deprecated SCSI ioctl, please convert it to SG_IO R...转载 2018-11-22 11:08:00 · 967 阅读 · 0 评论 -
Red Hat Enterprise Linux 7 server reboots when Trend Micro DS agent is updated
环境Red Hat Enterprise Linux 7 Trend Micro Deep Security Agent 9.6.2-7888.el7 (Kernel modules gsch and redirfs) Imperva Agent 11.5.0.5030 (kernel module krg_11_5_0_5030_imRH7K1smp64)问题What is the...转载 2019-08-19 16:48:47 · 956 阅读 · 0 评论 -
"Abort command Issued" messages appear in /var/log/messages file
环境Red Hat Enterprise Linux (RHEL) 5 6 7 Red Hat'sqla2xxxdriver QLogic FC HBAs Fibre Channel SAN问题We are noticing SAN errors across all our different system (SuSE, Solaris, even Window...转载 2017-05-27 14:56:04 · 7434 阅读 · 1 评论