centos编译升级gcc版本

yum -y -q install gcc gcc-c++ glibc-static libstdc++-static kernel-devel lbzip2
wget ftp://gcc.gnu.org/pub/gcc/releases/gcc-9.2.0/gcc-9.2.0.tar.gz  -O -|tar xz
cd gcc-9.2.0
./contrib/download_prerequisites
./configure --enable-checking=release --enable-languages=c,c++ --disable-multilib
make
make install

Linux本地自签ssl

yum -y -q install nss-tools gcc
export VER="v1.4.0" 
wget -O mkcert https://github.com/FiloSottile/mkcert/releases/download/${VER}/mkcert-${VER}-linux-amd64
chmod +x mkcert 
mv mkcert /usr/local/bin
mkcert -install

mkcert 域名.后缀 '*.域名.后缀 ' 域名2.后缀  localhost 127.0.0.1 ::1

随后生成pem和key 直接在http服务器上绑定即可以使用。

nginx lua暴力简单过滤cc攻击

原文地址:http://jtwo.me/use-lua-to-protect-nginx-away-from-cc-attack

好像原文出处的页面已经打不开了,原生的nginx需要编译lua,openresty可以直接用。

location ~ \.php$ {
    rewrite_by_lua '
        local md5token = ngx.md5(ngx.var.remote_addr .. ngx.var.http_user_agent)
        if (ngx.var.cookie_humanflag ~= md5token) then
            ngx.header["Set-Cookie"] = "humanflag=" .. md5token
            return ngx.redirect(ngx.var.scheme .. "://" .. ngx.var.host .. ngx.var.uri)
        end
    ';
    ... ...
}

location ~ \.php$ {
    if ($cookie_ipaddr != "$remote_addr"){
        add_header Set-Cookie "ipaddr=$remote_addr";
        rewrite .* "$scheme://$host$uri" redirect;
    }

    ... ...
}

iptables屏蔽常规邮件端口

iptables -A INPUT -p tcp -m multiport --dport 25,110,465:587,993:995 -j DROP
iptables -A INPUT -p udp -m multiport --dport 25,110,465:587,993:995 -j DROP
iptables -A OUTPUT -p tcp -m multiport --dport 25,110,465:587,993:995 -j DROP
iptables -A OUTPUT -p udp -m multiport --dport 25,110,465:587,993:995 -j DROP
/etc/init.d/iptables save

bash升级5.0

yum -y -q  install wget gcc patch 
wget https://ftp.gnu.org/gnu/bash/bash-5.0.tar.gz -O - | tar xz
cd bash-5.0
wget -r -nd -np http://ftp.gnu.org/gnu/bash/bash-5.0-patches/
for BP in `ls bash50-*|grep -v sig`; do patch -p0 < $BP; done
./configure 
make
make install

centos7编译php7.3

yum -y install epel-release -y
                                                                                                                                                                                        
yum -y --skip-broken install gcc  vim-enhanced gcc-c++ libtool-libs libtool autoconf subversion zip unzip  wget crontabs iptables file bison patch mlocate flex diffutils automake imake make cmake kernel-devel cpp zlib-devel \
libevent-devel libxml2-devel freetype-devel  gd gd-devel libjpeg-devel libpng-devel ncurses-devel  \
curl-devel readline-devel openssl-devel  glibc-devel  glib2-devel bzip2-devel e2fsprogs-devel libidn-devel  gettext-devel expat-devel libcap-devel  libtool-ltdl-devel pam-devel \
libxslt-devel libc-client-devel freetds-devel unixODBC-devel  libXpm-devel krb5-devel libicu-devel icu   sqlite-devel oniguruma-devel
                                                                                                                                                                                        
cd /tmp
wget https://nih.at/libzip/libzip-1.2.0.tar.gz  -O - | tar xz
cd libzip-*
./configure --prefix=/usr
make && make install
cp /usr/lib/libzip/include/zipconf.h  /usr/local/include/zipconf.h
ldconfig
                                                                                                                                                                                        
cd /tmp
wget -c http://us2.php.net/distributions/php-7.3.10.tar.gz -O - | tar xz
cd php-7.3*
./configure  --with-config-file-path=/opt/php7/etc --with-config-file-scan-dir=/opt/php7/etc/php.d --prefix=/opt/php7/usr --enable-fpm --enable-bcmath --enable-exif --enable-ftp --enable-mbstring --enable-soap --enable-sockets --enable-zip --with-curl --with-freetype-dir=/usr --with-gettext --with-openssl --with-xmlrpc --with-png-dir  --with-jpeg-dir --with-gd --with-libxml-dir=/usr  --with-mhash  --with-mysql-sock=/var/lib/mysql/mysql.sock --with-pdo-mysql=mysqlnd --with-mysqli=mysqlnd --with-imap --with-imap-ssl --with-kerberos --with-zlib --enable-intl=shared --enable-xml --disable-rpath --enable-shmop --enable-sysvsem --enable-mbregex  --with-iconv-dir --enable-pcntl --enable-opcache --enable-exif  --with-sqlite3 --with-pdo-sqlite --enable-calendar --enable-wddx --with-libdir=lib64 ;
make -j `grep name /proc/cpuinfo|wc -l`
make install
mkdir -p /opt/php7/etc/
cp php.ini-production /opt/php7/etc/php.ini
#cp ./sapi/fpm/php-fpm /etc/init.d/php-fpm
cp ./sapi/fpm/php-fpm.service /usr/lib/systemd/system/
sed -i 's#expose_php = On#expose_php = Off#'  /opt/php7/etc/php.ini
sed -i 's/;date.timezone =/date.timezone = PRC/g'  /opt/php7/etc/php.ini
sed -i 's/;cgi.fix_pathinfo=1/cgi.fix_pathinfo=0/g' /opt/php7/etc/php.ini
sed -i 's#enable_dl = Off#enable_dl = On#'  /opt/php7/etc/php.ini
sed -i 's#short_open_tag = Off#short_open_tag = On#'  /opt/php7/etc/php.ini
sed -i 's#output_buffering = Off#output_buffering = On#'  /opt/php7/etc/php.ini
sed -i 's/memory_limit = 32M/memory_limit = 128M/g' /opt/php7/etc/php.ini
sed -i 's/post_max_size = 8M/post_max_size = 32M/g' /opt/php7/etc/php.ini
sed -i 's/upload_max_filesize = 2M/upload_max_filesize = 16M/g' /opt/php7/etc/php.ini
sed -i 's#allow_call_time_pass_reference = Off#allow_call_time_pass_reference = On#' /opt/php7/etc/php.ini
sed -i 's/disable_functions =/disable_functions="exec,system,passthru,shell_exec,escapeshellarg,escapeshellcmd,ini_alter,dl,popen,chown,chroot,chgrp,ini_restore,dbmopen,dbase_open"/g' /opt/php7/etc/php.ini





手掌脱皮手指干裂

又是一年秋季,有些人手的手掌脱皮,指尖脱皮龟裂且裂口出外翻。

如果只是脱皮其实还好,也就手掌的掌纹变白皮肤犹如枯枝扎人,但是如果指尖脱皮又开裂,就生不如死没,一是痛二是指尖的触觉犹如覆盖了一层502胶水。

我的解决办法是在发现贴创口贴的地方皮肤明显更加湿润和热水泡胀手脚皮肤去角质层想到的,然后跑药店买了几幅医用手套,
在睡前洗涂抹新鲜的肉芦荟(用护手霜或甘油也可以)再戴手套睡觉,反复折腾几天后皮肤就恢复了正常机能。

如果情况严重的建议先去医院断诊。

阅读剩余部分...

加班文化

早些年(新千年之前), 一群人下岗创业, 长三角和珠三角蒸蒸日上, 内陆的乡镇企业逐渐因为产业
升级开始没落, 内陆乡镇的人开始外出到沿海打工.

这些人的相同点, 没什么钱/背井离乡.

阅读剩余部分...

Centos7新装系统sshd安全设置

firewall-cmd --zone=public --add-port=3001/tcp --permanent
firewall-cmd --reload
sed -i  's/#Port 22/Port 3001/g' /etc/ssh/sshd_config
service sshd restart

众所周知

最近几年的一些营销号和自媒体的视频和文章都特别+非常+特别非常喜欢带上“众所周知”。      

一些特点 视频内容多数是东拼西凑出来的或者搬运过来重新配音并打上LOGO,

常用语 “众所周知” “小伙伴们怎么看?” “各位网友怎么看” “各位网友如何如何”

文稿内容只要能看到“众所周知”可以判断100%是自媒体营销号,然后通篇内容就是视频配音读稿的文案一字不改直接发出来,有时候看着看着都能自动脑补BGM。

还有一类更恶劣的,直接看图编内容,东拼西凑出来狗屁不通的洗稿见闻内容。

这拨人给人的感觉好像都是一个窝里面的, 和UC震惊部一样一样的,不知道啥时候才是头,这些想蟑螂的傻逼才会死翘翘进垃圾桶。


永隆银行的路由/银行/分行号

银行名/Bank Name : CMB Wing Lung Bank Hong Kong

银行编号/Bank Code : 020

SWIFT Code / BIC : WUBAHKHH

分行编号/Branch Code : 601

地址/Bank Address: WING LUNG BANK BUILDING, FLOOR 3, 45 DES VOEUX ROAD, CENTRAL

城市/City : HONG KONG


Centos7下通过grub2引导进行网络自动重装系统

Shell大致流程

1.获取网络IP配置参数

2.写入自定义grub引导内核

 2.1 http://103.xxx.xxx.xxx/kickstart.php/rh?end=1&amp;ethworkaround=1是预设定的anaconda-ks自动响应安装脚本。
3.修改grub默认配置参数等待时间和指定引导顺序。

4. 重新生成grub2配置

5.重启等待安装完成。

最后建议在NoVNC或者IPMi辅助的情况下使用。

vmlinuz的网络参数还有一种写法是 ip=address::gateway:netmask:hostname:interface:method

getETH=`ip -4 route list 0/0 |awk '{ print $5 }'`
getGATEWAY=`ip -4 route list 0/0 |awk '{ print $3 }'`
getNETMASK=`ifconfig $getETH | awk '/mask /{ print $4;}'`
getIPADDR=`ifconfig $getETH | awk '/inet /{ print $2;}'`

cat>>/etc/grub.d/40_custom<<EOF
menuentry 'Netinstall' {
load_video
set gfxpayload=keep
insmod gzio
insmod part_gpt
insmod xfs
set root='hd0,gpt2'
linux16 /vmlinuz ro ks='http://103.xxx.xxx.xxx/kickstart.php/rh?end=1&ethworkaround=1' net.ifnames=0 biosdevname=0 crashkernel=auto gateway=$getGATEWAY ip=$getIPADDR nameserver=8.8.8.8 ksdevice=$getETH  netmask=$getNETMASK
initrd16 /initrd.img
}
EOF
 sed -i 's/GRUB_TIMEOUT=5/GRUB_TIMEOUT=60/g'  /etc/default/grub
 sed -i 's/GRUB_DEFAULT=saved/GRUB_DEFAULT=Netinstall/g'  /etc/default/grub
 grub2-mkconfig --output=/boot/grub2/grub.cfg
 reboot

RouterOS导入key登陆ssh

Linux或者Mac OS生成一个key

ssh-keygen -t rsa

用scp上传到Mikrotik

scp -P端口 ~/.ssh/id_rsa.pub [email protected]:id_rsa.pub

在Mikrotik内导入key

[[email protected]] > /user ssh-keys import public-key-file=id_rsa.pub user=admin

打印查看

[[email protected]] > /user ssh-keys print
Flags: R - RSA, D - DSA        
 #   USER                       BITS KEY-OWNER        
 0 R admin                      2048 XXXXXXX

ipmitool获取mac地址

抓取主板第一个网卡mac地址

ipmitool  raw 0x30 0x21 | tail -c 18 |sed 's/ /:/g'

抓取BMC网口mac地址

ipmitool raw 0x0c 0x02 0x01 0x05 0x00 0x00|tail -c18| sed 's/ /:/g'
or
ipmitool lan print | grep "MAC Address" |tail -c18

转载:How To Connect To Cisco Devices Via Serial Port Using GNU/Linux

原文链接 :https://acidborg.wordpress.com/2010/12/30/how-to-connect-to-cisco-devices-via-serial-port-using-gnulinux/
原文标题:How To Connect To Cisco Devices Via Serial Port Using GNU/Linux

Filed under: Linux, SysAdmin — acidborg @ 10:17
Description: to connect your computer to a Cisco device via its console port, you usually need a RJ45 rolled cable. You can use a RJ-45 to DB-9 Female if your computer has a serial port.

RJ-45 to DB-9 Female

To communicate through the serial port with the Cisco device, you need Minicom, a terminal emulator software.

阅读剩余部分...