0720RHCSA

Use rpm install zsh( Ignore dependency installation )

[[email protected] ~]# rpm --nodeps -hiv zsh-5.5.1-9.el8.x86_64.rpm
warning: zsh-5.5.1-9.el8.x86_64.rpm: Header V3 RSA/SHA256 Signature, key ID 8483c65d: NOKEY
Verifying...                          ################################# [100%]
Preparing...                          ################################# [100%]
Updating / installing...
   1:zsh-5.5.1-9.el8                  ################################# [100%]

• Check if... Is installed

  [[email protected] ~]# rpm -qi zsh-5.5.1-9.el8.x86_64.rpm
  zsh-5.5.1-9.el8.x86_64
  

  uninstall zsh

  [[email protected] ~]# rpm -e zsh-5.5.1-9.el8.x86_64
  

  Query all installed software

• [[email protected] ~]# rpm -qa
  

  Inquire about date Command package

  [[email protected] ~]# whereis date
  date: /usr/bin/date /usr/share/man/man1/date.1.gz /usr/share/man/man1p/date.1p.gz
  [[email protected] ~]# cd /usr/bin/
  [[email protected] bin]# rpm -qf date
  coreutils-8.30-12.el8.x86_64
  

  Query not installed zsh File information for

• [[email protected] bin]# rpm -ql zsh-5.5.1-9.el8.x86_64
  package zsh-5.5.1-9.el8.x86_64 is not installed
  

  yum Local source configuration

• [[email protected] mnt]# mount /dev/sr0 /mnt/ 
  mount: /mnt: /dev/sr0 already mounted on /mnt.
  [[email protected] mnt]# cd  /etc/yum.repos.d/
  [[email protected] yum.repos.d]# vim redhat.repo 
  """
  [BaseOS]
  name=BaseOS
  baseurl=file:///mnt/BaseOS
  gpgcheck=0
  
  [AppStream]
  name=AppStream
  baseurl=file:///mnt/AppStream
  gpgcheck=0
  """ To configure 
  
  [[email protected] yum.repos.d]# yum clean all
  [[email protected] yum.repos.d]# yum makecache
  

  yum Network source configuration

• sftp> put C:\Users\jameth\Desktop\Centos-vault-8.5.2111.repo /etc/yum.repos.d
  Uploading C:/Users/jameth/Desktop/Centos-vault-8.5.2111.repo to /etc/yum.repos.d/Centos-vault-8.5.2111.repo
  C:/Users/jameth/Desktop/Centos-vault-8.5.2111.repo                                    100% 2519     1.2MB/s   00:00
  
  
  [[email protected] yum.repos.d]# ls -l
  total 8
  -rw-r--r--. 1 root root 2519 Jul 20 18:57 Centos-vault-8.5.2111.repo
  -rw-r--r--. 1 root root  487 Jul 20 18:35 redhat.repo
  [[email protected] yum.repos.d]# yum clean all
  [[email protected] yum.repos.d]# yum makecache
  

  install httpd Software

• [[email protected] yum.repos.d]# yum install httpd
  

  see vim Which package does the command belong to

  [[email protected] yum.repos.d]# whereis vim
  vim: /usr/bin/vim /usr/share/vim /usr/share/man/man1/vim.1.gz
  [[email protected] yum.repos.d]# rpm -qf /usr/bin/vim
  vim-enhanced-8.0.1763-16.el8.x86_64
  

  yum uninstall httpd

  [[email protected] yum.repos.d]# yum remove httpd
  

  Clean cache

  [[email protected] yum.repos.d]# yum clean all
  

  Recreate cache

• [[email protected] yum.repos.d]# yum makecache
  

  install postgresql Version in the module 13

• [[email protected] yum.repos.d]# yum install @postgresql:13
  

  Source code installation : httpd

• [[email protected] ~]# tar xf httpd-2.4.12.tar.gz 
  [[email protected] ~]# cd httpd-2.4.12/
  [[email protected] ~]# ./configure --prefix=/usr/local/httpd24 --enable-so --enable-rewrite --enable-ssl
  [[email protected] ~]# make && make install
  

  see root User processes with terminals

• [[email protected] ~]#  ps -l
  

  Show processes without terminals

  [[email protected] ~]#  ps -x
  

  Show all processes

• [[email protected] ~]#  ps aux
  

  see 1 In minutes CPU Time ago 10 The process of ( Use top command

•  top |head -;top |grep -v PID|sort -rn -k +|head