有时候安装yum包，发现有的已经安装过了但是如果执行安装，yum需要检查源，输出一堆的信息，看起来很烦，于是就想到了先检查后安装，如果本地已经安装，不执行安装，如果没有安装就进行安装。

去重后需要安装的yum安装包如下：

autoconf bison bison-devel bzip2 bzip2-devel ca-certificates cairo-devel c-ares c-ares-devel cmake crontabs curl curl-devel diffutils
e2fsprogs e2fsprogs-devel expat-devel file flex freetype freetype-devel gcc gcc-c++ gcc-g77 gd gd-devel gettext gettext-devel git-core glib2 gl
ib2-devel glibc.i686 gmp-devel icu kernel-devel krb5 krb5-devel libaio-devel libcap libc-client-devel libcurl libcurl-devel libevent libevent-d
evel libicu-devel libidn libidn-devel libjpeg libjpeg-devel libpng libpng10 libpng10-devel libpng-devel libstdc++.so.6 libtool libtool-libs lib
webp libwebp-devel libxml2 libxml2-dev libxml2-devel libXpm-devel libxslt libxslt* libxslt-devel lsof make ncurses ncurses-devel net-tools open
ssl openssl-devel patch pcre pcre-devel perl perl-Data-Dumper perl-devel psmisc pspell-devel python-devel python-imaging readline-devel tar unz
ip vim-minimal vixie-cron wget zip zlib zlib-devel

shell源码

cat yumci.sh

#!/bin/bash
#writen by Aiker

myum() {
if ! rpm -qa|grep -q "^$1"
then
    yum install -y $1
    check_ok
else
    echo $1 already installed.
fi
}

check_ok() {
if [ $? != 0 ]
then
    echo "Error,Check the error log."
fi
}

for p in autoconf bison bison-devel bzip2 bzip2-devel ca-certificates cairo-devel c-ares c-ares-devel cmake crontabs curl curl-devel diffutils
e2fsprogs e2fsprogs-devel expat-devel file flex freetype freetype-devel gcc gcc-c++ gcc-g77 gd gd-devel gettext gettext-devel git-core glib2 gl
ib2-devel glibc.i686 gmp-devel icu kernel-devel krb5 krb5-devel libaio-devel libcap libc-client-devel libcurl libcurl-devel libevent libevent-d
evel libicu-devel libidn libidn-devel libjpeg libjpeg-devel libpng libpng10 libpng10-devel libpng-devel libstdc++.so.6 libtool libtool-libs lib
webp libwebp-devel libxml2 libxml2-dev libxml2-devel libXpm-devel libxslt libxslt* libxslt-devel lsof make ncurses ncurses-devel net-tools open
ssl openssl-devel patch pcre pcre-devel perl perl-Data-Dumper perl-devel psmisc pspell-devel python-devel python-imaging readline-devel tar unz
ip vim-minimal vixie-cron wget zip zlib zlib-devel;do myum $p;done

输出实例如下：

```[root@aaa ~]# sh ci.sh
autoconf already installed.
bison already installed.
bison-devel already installed.
bzip2 already installed.
bzip2-devel already installed.
ca-certificates already installed.
cairo-devel already installed.
c-ares already installed.
c-ares-devel already installed.
cmake already installed.
crontabs already installed.
curl already installed.
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package libcurl-devel-7.29.0-42.el7_4.1.x86_64 already installed and latest version
  Nothing to do
  diffutils already installed.
  e2fsprogs already installed.
  e2fsprogs-devel already installed.
  expat-devel already installed.
  file already installed.
  flex already installed.
  freetype already installed.
  freetype-devel already installed.
  gcc already installed.
  gcc-c++ already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  No package gcc-g77 available.
  Error: Nothing to do
  Error,Check the error log.
  gd already installed.
  gd-devel already installed.
  gettext already installed.
  gettext-devel already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package git-1.8.3.1-12.el7_4.x86_64 already installed and latest version
  Nothing to do
  glib2 already installed.
  glib2-devel already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package glibc-2.17-196.el7_4.2.i686 already installed and latest version
  Nothing to do
  gmp-devel already installed.
  icu already installed.
  kernel-devel already installed.
  krb5 already installed.
  krb5-devel already installed.
  libaio-devel already installed.
  libcap already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package uw-imap-devel-2007f-16.el7.x86_64 already installed and latest version
  Nothing to do
  libcurl already installed.
  libcurl-devel already installed.
  libevent already installed.
  libevent-devel already installed.
  libicu-devel already installed.
  libidn already installed.
  libidn-devel already installed.
  libjpeg already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package libjpeg-turbo-devel-1.2.90-5.el7.x86_64 already installed and latest version
  Nothing to do
  libpng already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  No package libpng10 available.
  Error: Nothing to do
  Error,Check the error log.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  No package libpng10-devel available.
  Error: Nothing to do
  Error,Check the error log.
  libpng-devel already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package libstdc++-4.8.5-16.el7_4.2.i686 already installed and latest version
  Nothing to do
  libtool already installed.
  aded plugins: fastestmirror
  ▽oading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package libtool-ltdl-2.4.2-22.el7_3.x86_64 already installed and latest version
  Nothing to do
  libwebp already installed.
  libwebp-devel already installed.
  libxml2 already installed.
  libxml2-dev already installed.
  libxml2-devel already installed.
  libXpm-devel already installed.
  libxslt already installed.
  libxslt* already installed.
  libxslt-devel already installed.
  lsof already installed.
  make already installed.
  ncurses already installed.
  ncurses-devel already installed.
  net-tools already installed.
  openssl already installed.
  openssl-devel already installed.
  patch already installed.
  pcre already installed.
  pcre-devel already installed.
  perl already installed.
  perl-Data-Dumper already installed.
  perl-devel already installed.
  psmisc already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  No package pspell-devel available.
  Error: Nothing to do
  Error,Check the error log.
  python-devel already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.com
  Package python-pillow-2.0.0-19.gitd1c6db8.el7.x86_64 already installed and latest version
  Nothing to do
  readline-devel already installed.
  tar already installed.
  unzip already installed.
  vim-minimal already installed.
  Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
• base: mirrors.aliyun.com
• epel: mirrors.aliyun.com
• extras: mirrors.aliyun.com
• updates: mirrors.aliyun.comNo package vixie-cron available.Error: Nothing to doError,Check the error log.wget already installed.zip already installed.zlib already installed.zlib-devel already installed.