今天在安装 jre的rpm包的时候，出现以下问题：
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# ls
firefox-2.0.0.16-cn.pet minicom-2.3 virtualbox-2.0.0_k2.6.21.7.pet
jre-6u1-linux-i586.rpm minicom-2.3.tar.gz 新文件
# rpm -i jre-6u1-linux-i586.rpm
rpm: cannot make dir ./etc: File exists
rpm: cannot make dir ./usr: File exists
89797 blocks
# rpm -i jre-6u1-linux-i586.rpm
'rpm: cannot make dir ./etc: File exists
rpm: cannot make dir ./etc/.java: File exists
rpm: cannot make dir ./etc/.java/.systemPrefs: File exists
rpm: cannot make dir ./usr: File exists
rpm: cannot make dir ./usr/java: File exists
rpm: c
我下载了一个minicom-2.3.tar.gz的文件，是在linux下 使用串口的一个通讯程序，按照这个安装步骤，出现了一下问题：
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# tar zxf minicom-2.2.tar.gz
# cd minicom-2.2
# ./configure
# make
# make install
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在进行到 ./configure时候 出现问题
checking for a BSD-compatible install... /usr/bin/ginstall -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... ./install-sh -c -d
checking for gawk... gawk
checking whether make sets $(MAKE)... no
checking for gcc... no
checking for cc... no
checking for cl.exe...
