[root@localhost ~]# su face su: failed to execute /bin/bash: Resource temporarily unavailable

本文介绍了解决Linux系统中因资源限制导致的远程登录及su命令使用异常的问题。通过修改/etc/security/limits.d/20-nproc.conf文件中的nproc参数,将默认值从4096调整为8192,成功恢复了远程登录和su命令的正常使用。

报错的背景:

原来好好的,过了一段时间,远程不能登录,su也不能正常的使用显示的是资源受限

这个只需要去改下

[root@localhost face]# egrep -v "^$|^#" /etc/security/limits.d/20-nproc.conf

*          soft    nproc     4096

root       soft    nproc     unlimited

默认的应该是4096

我直接改成了8192

[root@localhost face]# egrep -v "^$|^#" /etc/security/limits.d/20-nproc.conf

*          soft    nproc     8192

root       soft    nproc     unlimited

然后再su

就正常了

 

[root@localhost ~]# sudo yum install -y kubelet-1.23.17-0 kubeadm-1.23.17-0 kubectl-1.23.17-0 --disableexcludes=kubernetes 已加载插件:fastestmirror, langpacks Loading mirror speeds from cached hostfile * base: mirrors.aliyun.com * extras: mirrors.aliyun.com * updates: mirrors.aliyun.com https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" 正在尝试其它镜像。 https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" 正在尝试其它镜像。 https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" 正在尝试其它镜像。 https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" 正在尝试其它镜像。 https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" 正在尝试其它镜像。 https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" 正在尝试其它镜像。 https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#35 - "Encountered end of file" 正在尝试其它镜像。 One of the configured repositories failed (Kubernetes), and yum doesn't have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: 1. Contact the upstream for the repository and get them to fix the problem. 2. Reconfigure the baseurl/etc. for the repository, to point to a working upstream. This is most often useful if you are using a newer distribution release than is supported by the repository (and the packages for the previous distribution release still work). 3. Run the command with the repository temporarily disabled yum --disablerepo=kubernetes ... 4. Disable the repository permanently, so yum won't use it by default. Yum will then just ignore the repository until you permanently enable it again or use --enablerepo for temporary usage: yum-config-manager --disable kubernetes or subscription-manager repos --disable=kubernetes 5. Configure the failing repository to be skipped, if it is unavailable. Note that yum will try to contact the repo. when it runs most commands, so will have to try and fail each time (and thus. yum will be be much slower). If it is a very temporary problem though, this is often a nice compromise: yum-config-manager --save --setopt=kubernetes.skip_if_unavailable=true failure: repodata/repomd.xml from kubernetes: [Errno 256] No more mirrors to try. https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#7 - "Failed connect to packages.cloud.google.com:443; 拒绝连接" https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64/repodata/repomd.xml: [Errno 14] curl#35 - "Encountered end of file" [root@localhost ~]# [root@localhost ~]# # 启动 kubelet [root@localhost ~]# sudo systemctl enable kubelet Failed to execute operation: No such file or directory [root@localhost ~]# sudo systemctl start kubelet Failed to start kubelet.service: Unit not found.
07-30
已加载插件:fastestmirror, langpacks Loading mirror speeds from cached hostfile Could not retrieve mirrorlist http://mirrorlist.centos.org/?release=7&arch=x86_64&repo=os&infra=stock error was 14: curl#6 - "Could not resolve host: mirrorlist.centos.org; 未知的错误" One of the configured repositories failed (未知), and yum doesn&#39;t have enough cached data to continue. At this point the only safe thing yum can do is fail. There are a few ways to work "fix" this: 1. Contact the upstream for the repository and get them to fix the problem. 2. Reconfigure the baseurl/etc. for the repository, to point to a working upstream. This is most often useful if you are using a newer distribution release than is supported by the repository (and the packages for the previous distribution release still work). 3. Run the command with the repository temporarily disabled yum --disablerepo=<repoid> ... 4. Disable the repository permanently, so yum won&#39;t use it by default. Yum will then just ignore the repository until you permanently enable it again or use --enablerepo for temporary usage: yum-config-manager --disable <repoid> or subscription-manager repos --disable=<repoid> 5. Configure the failing repository to be skipped, if it is unavailable. Note that yum will try to contact the repo. when it runs most commands, so will have to try and fail each time (and thus. yum will be be much slower). If it is a very temporary problem though, this is often a nice compromise: yum-config-manager --save --setopt=<repoid>.skip_if_unavailable=true Cannot find a valid baseurl for repo: base/7/x86_64 [root@localhost ~]# sudo systemctl enable --now rsyslog Failed to execute operation: No such file or directory
11-13
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