RPM-QF usage tips and how to find packages

First look at the installed packages, or the time to install a certain package of commands

RPM (-QA) | grep software Name

[email protected] oldboy]# rpm-qa| grep opensslopenssl-devel-0.9.8e-22.el5openssl-0.9.8e-22.el5openssl-0.9.8e-22.el5openssl-devel-0.9.8e-22.el5[[  Email protected] oldboy]# Yum search opensslloaded plugins:fastestmirror, securityloading mirror speeds from cached Hostfilefile:///mnt/cdrom/repodata/repomd.xml: [Errno 5] OSError: [Errno 2] No such file or directory: '/mnt/cdrom/repoda Ta/repomd.xml ' Trying other mirror.=============================== matched:openssl =============================== M2crypto.x86_64:Support for using OpenSSL in Python scriptsopenssl.i686:The OpenSSL toolkitopenssl.x86_64:The openss L Toolkitopenssl-devel.i386:files for development of applications which would use:opensslopenssl-deve L.x86_64:files for development of applications which would use:opensslopenssl-perl.x86_64:perl SC Ripts provided with OpenSSLopenssl097a.i386:The OpenSSL toolkitopenssl097a.x86_64:The OpenSSL Toolkitperl-crypt-sslea Y.x86_64:crypt::ssleay-openssl glue that provides LWP Https:supportperl-net-ssleay.x86_64:perl Extension for using OpenSSLpyOpenSSL.x86_64:Python wrapper module around the OpenSSL libraryxmlsec1.i386:Library provi Ding support for "XML Signature" and "xml:encryption" standardsxmlsec1.x86_64:Library providing support fo R "XML Signature" and "xml:encryption" Standardsxmlsec1-openssl.i386:openssl Crypto plugin for XML secur ity Libraryxmlsec1-openssl.x86_64:openssl Crypto plugin for XML Security Libraryxmlsec1-openssl-devel.i386:openssl cry PTO plugin FOR XML security Libraryxmlsec1-openssl-devel.x86_64:openssl Crypto plugin for XML security Librar

If in the production environment, the system's important file/etc/inittab has been deleted (the system has not restarted, before the crash), do not worry, the following tells you how to deal with. 1. Accidental deletion of files [[[email protected] ~]# rm-rf/etc/inittab[[email protected] ~]# cat/etc/inittabcat:/etc/inittab: No such file or Directory2, create a new file, and view information about the corresponding package [[email protected] ~]# touch/etc/inittab[[email protected] ~]# RPM-QF/ETC/INITTABINITSCRIPTS-8.45.19.EL-1 3, determine the relevant information of the package, mount the installation CD, to find [[email protected] ~]# Cd/mnt/yum/[[email  protected] yum]# lltotal 0[[email protected] yum]# cd ~[[email protected] ~]# mount/dev/cdrom/mnt/ Yummount:block Device/dev/cdrom is write-protected, mounting read-only[[email protected] ~]# cd/mnt/yum/server/[ [Email protected] server]# cp initscripts-8.45.30-2.el5.i386.rpm/tmpcp:overwrite '/tmp/initscripts-8.45.30-2.el5.i386.rpm '? Y[[email protected] server]# cd/tmp[[email protected] tmp]# lltotal 1680drwx------2 root root 4096 Feb 17 1 3:45 bindrwx------9 root root 4096 Feb 13:45 etcdrwx------3 root root 4096 Feb 17 13:53gconfd-root-r--r--r--1 root root 1651907 Feb 15:41 initscripts-8.45.30-2.el5.i386.rpmdrwx------2 root root 4096 Fe b 13:53 keyring-06yg9fdrwx------2 root root 4096 Sep 08:44 keyring-elqvm1drwx------2 root root 4096 Sep 26 0 8:08 keyring-jtnbtbdrwx------3 root root 4096 Feb 13:45 libsrwxr-xr-x 1 root root 0 Feb 13:54 mapping-root drwx------2 root root 4096 Feb 15:38 orbit-rootdrwx------2 root root 4096 Feb 13:45 sbindrwx------2 root Ro  OT 4096 Feb 13:53 ssh-roxtuk6949drwx------4 root root 4096 Feb 13:45 usrdrwx------4 root root 4096 Feb 17 13:45 vardrwx------2 root root 4096 Feb 13:54 virtual-root.2eeluvdrwxrwxrwt 2 root root 4096 Feb 5 12:19 Vmwar ednddrwx------2 root root 4096 Feb 13:53 vmware-root 4, unpacking information [[email protected] tmp]# Rpm2cpio initscripts-8.4 5.30-2.el5.i386.rpm |cpio-imd10748 blocks[[email protected] tmp]# lltotal 1680drwx------2 root root 4096 Feb 17 13:45 bindrwx------9 roOT root 4096 Feb 13:45 etcdrwx------3 root root 4096 Feb 13:53 gconfd-root-r--r--r--1 root root 1651907 Feb 15:41 initscripts-8.45.30-2.el5.i386.rpmdrwx------2 root root 4096 Feb 13:53 keyring-06yg9fdrwx------2 Root Roo T 4096 Sep 08:44 keyring-elqvm1drwx------2 root root 4096 Sep-08:08 keyring-jtnbtbdrwx------3 root root 4 096 Feb 13:45 libsrwxr-xr-x 1 root root 0 Feb 13:54 mapping-rootdrwx------2 root root 4096 Feb 15:38 or bit-rootdrwx------2 root root 4096 Feb 13:45 sbindrwx------2 root root 4096 Feb 13:53 ssh-roxtuk6949drwx---- --4 root root 4096 Feb 13:45 usrdrwx------4 root root 4096 Feb 13:45 vardrwx------2 root root 4096 Feb 1 7 13:54 VIRTUAL-ROOT.2EELUVDRWXRWXRWT 2 root root 4096 Feb 5 12:19 vmwarednddrwx------2 root root 4096 Feb 17 13:5 3 Vmware-root5, file replacement and simple modification [[email protected] tmp]# cp./etc/inittab/etc/cp:overwrite '/etc/inittab '? Y[[email protected] tmp]# Cat/etC/inittab!!!!!!! 

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RPM-QF usage tips and how to find packages