Linux学习笔记之三

Linux学习三

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#设置固定IP

原因是虚机重启后IP变了,这样SSH时就要先知道IP才行,麻烦

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第一种（立即生效，重启后配置丢失）

ifconfig eth0 192.168.0.10 netmask 255.255.255.0

ifconfig eth0 up

第二种（重启后生效，重启电脑，IP不会丢失）

vi /etc/sysconfig/network-scripts/ifcfg-eth0

参考配置文件

DEVICE=eth0

ONBOOT=yes

BOOTPROTO=static

IPADDR=192.168.0.10

NETMASK=255.255.255.0

GATEWAY=192.168.0.1

HWADDR=00:0c:29:dd:a6:00

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# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)

DEVICE=eth0

BOOTPROTO=Dhcp

IPADDR=192.168.0.10

NETMASK=255.255.255.0

DHCPCLASS=

HWADDR=00:0C:29:16:72:7E

ONBOOT=yes

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#退出VI命令

先按esc，然后输入 :q! ，存盘退出输入 :wq

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#设置完IP后重新启动network

service network restart

设置完IP后SSH不上了...

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##重装了下CentOS先备份ifcfg-eth0

# Intel Corporation 82545EM Gigabit Ethernet Controller (Copper)

DEVICE=eth0

BOOTPROTO=dhcp

DHCPCLASS=

HWADDR=00:0C:29:CC:23:12

ONBOOT=yes

还是不行,"回滚"了

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#安装nginx成功

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#复制目录

将 /etc/ 目录下的所有内容复制到 /tmp。

[root@linux tmp]# cp /etc/ /tmp

#删除目录

rm -r /usr/local/nginx

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#ldd

[root@bogon nginx]# ldd $(which /opt/nginx/sbin/nginx)

        linux-vdso.so.1 =>  (0x00007ffff01fc000)

        libcrypt.so.1 => /lib64/libcrypt.so.1 (0x00002ac15257f000)

        libpcre.so.1 => not found

        libc.so.6 => /lib64/libc.so.6 (0x00002ac1527b7000)

        /lib64/ld-linux-x86-64.so.2 (0x00002ac152362000)

[root@bogon nginx]#

LDD是什么命令?

NGINX启动时提示错误：

    /usr/local/nginx/sbin/nginx -t

    /usr/local/nginx/sbin/nginx: error while loading shared libraries: libpcre.so.1: cannot open shared object file: No such file or directory

ldd $(which /usr/local/nginx/sbin/nginx)

    linux-vdso.so.1 => (0x00007fff48ff0000)

    libcrypt.so.1 => /lib64/libcrypt.so.1 (0x0000003065800000)

    libpcre.so.1 => not found

    libssl.so.6 => /lib64/libssl.so.6 (0x0000003067000000)

    libcrypto.so.6 => /lib64/libcrypto.so.6 (0x0000003066400000)

    libdl.so.2 => /lib64/libdl.so.2 (0x0000003063000000)

    libz.so.1 => /lib64/libz.so.1 (0x0000003063c00000)

    libc.so.6 => /lib64/libc.so.6 (0x0000003062c00000)

    libgssapi_krb5.so.2 => /usr/lib64/libgssapi_krb5.so.2 (0x0000003066c00000)

    libkrb5.so.3 => /usr/lib64/libkrb5.so.3 (0x0000003069c00000)

    libcom_err.so.2 => /lib64/libcom_err.so.2 (0x0000003068800000)

    libk5crypto.so.3 => /usr/lib64/libk5crypto.so.3 (0x0000003069000000)

    /lib64/ld-linux-x86-64.so.2 (0x0000003062800000)

    libkrb5support.so.0 => /usr/lib64/libkrb5support.so.0 (0x000000306a800000)

    libkeyutils.so.1 => /lib64/libkeyutils.so.1 (0x0000003067c00000)

    libresolv.so.2 => /lib64/libresolv.so.2 (0x0000003068400000)

    libselinux.so.1 => /lib64/libselinux.so.1 (0x0000003064400000)

    libsepol.so.1 => /lib64/libsepol.so.1 (0x0000003064000000)

解决方法：

    ln -s /usr/local/lib/libpcre.so.1 /lib64

32位系统则：

    ln -s /usr/local/lib/libpcre.so.1 /lib

注：

/usr/local/lib/libpcre.so.1 为prce安装后的文件地址

低版本prce对应的libpcre.so.1 为libpcre.so.0

OK终于搞定了

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