====== YUM ======

<code bash>
yum search epel
yum install epel-release
yum list glibc


yum --setopt=tsflags=noscripts remove xxx
rpm -e --noscripts xxx
yum clean all && rpm --rebuilddb
package-cleanup --problems

</code>

====== RPM Build ======

<code bash>
# setup working directories
rpmdev-setuptree

# download source defined in spec file
spectool -g -R SPECS/package.spec

# build package
rpmbuild -ba SPECS/package.spec

# show build script of a package
rpm -qpl --scripts RPMS/x86_64/package-0.1.0-1.el6.x86_64.rpm
</code>

ref:

https://fedoraproject.org/wiki/How_to_create_a_GNU_Hello_RPM_package

====== SELinux ======

===== 檢查有無啟動 =====

<code>
getenforce
</code>

===== 暫時關閉 =====

<code>
setenforce 0
</code>

===== 永久關閉 =====

編輯 /etc/sysconfig/selinux
設定為 SELINUX=disabled

===== 允許 apache reverse proxy =====

<code>
setsebool httpd_can_network_connect 1
</code>