ORA-27303
ORA-27303 APPLIES TO Operating System - Oracle Linux Server 7.9 Oracle Database - Enterprise Edition - version 11.2.0.4.0 Oracle Grid Infrastructure - version 11.2.0.4.0 SYMPTOMS RAC node 1 instance connect " /as sysdba" fails. ~]$ sqlplus / as sysdbaSQL*Plus: Release 11.2.0.4.0 Production on Wed Feb 7 18:13:52 2024Copyright (c) 1982, 2013, Oracle. All rights reserved.ORA-27140: attach to post/wait facility failedORA-27300: OS system dependent operation:invalid_egid failed with status: ...
Updating the host with VIBs from an image profile or VIB packages
Updating the host with VIBs from an image profile or VIB packages esxcli software vib ~] esxcli software vibUsage: esxcli software vib {cmd} [cmd options]Available Namespaces: signature Commands to verify signatures and show information about the signature verification status of VIB packagesAvailable Commands: get Displays detailed information about one or more installed VIBs install Installs VIB packages from a URL or depot. VIBs may be insta...
VMware ESXi Quick Commands
VMware ESXi Quick Commands Show the hardware memory information: smbiosDump | grep "Size:" vmware -vesxcli storage core adapter listesxcli storage core device listesxcli storage core path list -d naa.600b342a17eacb1d6e6bde340d0000d0esxcli storage nmp device list -d naa.600b342a17eacb1d6e6bde340d0000d0esxcli storage core path list | grep "State: active" | wc -l Shutdown or Reboot VMs vim-cmd ~] vim-cmd vmsvc/getallvms~] vim-cmd vmsvc/power.off <vmid>~] vim-cmd vmsvc/power.on <vmid...
How to Analyze the Core Dump on Linux 7
How to Analyze the Core Dump on Linux 7 Installing the crash utility To analyze the vmcore dump file, you must have the crash and kernel-debuginfo packages installed. ~]# yum -y install yum-utils~]# debuginfo-install kernel~]# yum install crash or install manually. ~]# rpm -ivh kernel-debuginfo-common-x86_64-3.10.0-1160.el7.x86_64.rpmwarning: kernel-debuginfo-common-x86_64-3.10.0-1160.el7.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID b6792c39: NOKEYPreparing... ...
How to rescue system while boot grub lost
How to rescue system while boot grub lost Symptoms System boot fails and entering rescue mode. Solution Boot with ISO, enter rescue mode and create grub.cfg file. chroot /mnt/sysrootmount /dev/cdrom /mntrpm -ivh /mnt/Packages/kernel-core-*.rpm --forcegrub2-mkconfig >/boot/grub2/grub.cfgreboot
How to recover database after data files lost
How to recover database after data files lost Symptoms The database lost all data files except list below. -rw-r----- 1 oracle oinstall 11M Aug 20 22:05 cjc01.dbf-rw-r----- 1 oracle oinstall 1.2G Aug 21 12:15 system01.dbf Solution Find database compatible version. ~]# strings system01.dbf | grep "RDBMS version"11.2.0.4.0 RDBMS version for NLS parameters, Find database db_name. BBED> set file 1 block 1 FILE# 1 BLOCK# 1BBED> map /vBBED> p kcvfh st...
Regular Expressions
Regular Expressions The special characters (meta-characters) used for defining regular expressions are: * . ^ $ + ? ( ) [ ] { } | \ Character sets and character classes Operators Description [abc] Match any single character from from the listed characters [a-z] Match any single character from the range of characters [^abc] Match any single character not among listed characters [^a-z] Match any single character not among listed range of characters . Match any single character ...
http request
http request get or post requests 服务端渲染 客户端渲染 第一次请求 html 框架，第二次请求数据。 如何获取第二次请求方式？ 请求： 请求行 请求头 请求体 响应： 状态行 响应头 响应体 数据解析 re 正则表达式 bs4 xpath Proxy 根据支持的协议分类： HTTP 代理：主要用于普通的网页浏览，可以转发 HTTP 请求（详见：HTTP 请求方法）。 SSL/HTTPS 代理：支持 HTTPS 协议，可以为使用 SSL 加密的网站提供安全的数据传输。(安全性较高的匿名浏览的好选择) Socket4/5 代理：Socks4 和 Socks5 支持更多的网络协议，不仅限于 HTTP 和 HTTPS，适用于更广泛的网络请求。（支持多种协议代理的好选择） Socket4：只支持 TCP 协议，不支持 UDP 协议，也不支持域名解析（DNS）。 Socket5：支持 TCP 和 UDP 协议，支持多种身份验证机制，以及服务器端域名解析。（可以完成 socket4 所有网络请求，首选） 根据匿名程度分类： 透明代理...
Installing bilibili Desktop on Ubuntu 24.04
Installing bilibili Desktop on Ubuntu 24.04 Ubuntu 24.04 Kali Linux Visit Github: bilibili-linux, and download bilibili--x64.tar.gz. wget -cP ~/Downloads https://github.com/msojocs/bilibili-linux/releases/download/<version>/bilibili-<version>-x64.tar.gzmkdir ~/Software/bilibilitar -zxf ~/Downloads/bilibili-<version>-x64.tar.gz -C ~/Software/bilibili Download bilibili icon picture. curl -o ~/Software/bilibili/bilibili.svg https://meno.lostyu.qzz.io/assets/pic/post/55bb...
The trap command
The trap command SIG List. sakura@sakurayumeno:~$ trap -l 1) SIGHUP 2) SIGINT 3) SIGQUIT 4) SIGILL 5) SIGTRAP 6) SIGABRT 7) SIGBUS 8) SIGFPE 9) SIGKILL 10) SIGUSR111) SIGSEGV 12) SIGUSR2 13) SIGPIPE 14) SIGALRM 15) SIGTERM16) SIGSTKFLT 17) SIGCHLD 18) SIGCONT 19) SIGSTOP 20) SIGTSTP21) SIGTTIN 22) SIGTTOU 23) SIGURG 24) SIGXCPU 25) SIGXFSZ26) SIGVTALRM 27) SIGPROF 28) SIGWINCH 29) SIGIO ...
