初始化模板腳本實現
1、查看 cat /etc/redhat-release 確認是centos7還是centos6
2、檢查是否能ping www.baidu.com 不能的話檢查 vim /etc/resolv.conf
3、設置主機名，請檢查hostname
4、關閉selinux
5、關閉防火墻
6、查看內存 cpu 硬盤大小
7、換成阿里云的的源 //這里需要一個人為的判斷，是否換成阿里云的源 是為換 不是為不換
8、下載必要的初始化的工具 //yum -y install net-tools tree nmap lrzsz dos2unix telnet screen vim lsof wget ntp rsync
9、修改IP和主機名的對應關系
10、查看時間 并設置初始化時間
11、設置linux的最大文件打開數
12、centos6系統設置grep加顏色別名
13、centos7特有的默認還有進程數限制/etc/security/limits.d/20-nproc.conf
14、禁止內存巨大頁
15、禁止swap交換（可選）
16、ssh優化，正反向解析 //這一步在腳本中，沒有寫，
sed -i "s/#UseDNS yes/UseDNS no/g" /etc/ssh/sshd_config && sed -i "s/GSSAPIAuthentication yes/GSSAPIAuthentication no/g" /etc/ssh/sshd_config
ssh 連接緩慢解決方法
http://blog.chinaunix.net/uid-16728139-id-3435980.html

修改后，別忘了重啟sshd服務
service sshd restart
17、 //hbase要設置的 關鍵是當內存為8G的時候這樣設置
set vm.min_free_kbytes to least 1GB(8GB on larger memory systems)
//該文件表示強制Linux VM最低保留多少空閑內存（Kbytes）。 //代表系統所保留空閑內存的最低限
官方文檔中要求min_free_kbytes不能小于1G（在大內存系統中設置8G），就是不要輕易觸發直接回收。
當可用內存低于這個參數時，系統開始回收cache內存，以釋放內存，直到可用內存大于這個值。
vm.min_free_kbytes=409600;
vm.vfs_cache_pressure=200;
vm.swappiness=40。
調整MIN_FREE_KBYTES的目的是保持物理內存有足夠的空閑空間，防止突發性的換頁。
swapiness缺省為60，減少swapiness會使系統盡快通過swapout不使用的進程資源來釋放更多的物理內存。
vfs_cache_pressure的缺省值是100，加大這個參數設置了虛擬內存回收directory和i-node緩沖的傾向，這個值越大，回收的傾向越嚴重。調整這3個參數的目的就是讓操作系統在平時就盡快回收緩沖，釋放物理內存，這樣就可以避免突發性的大規模換頁。
https://blog.csdn.net/hanyingzhong/article/details/71637391?utm_source=blogxgwz0
具體操作如下：
[root@NewCDH-0--141 ~]# cat /proc/sys/vm/min_free_kbytes //原來的
67584
[root@NewCDH-0--141 ~]# cat /proc/sys/vm/min_free_kbytes //設置成
1048576
[root@NewCDH-0--141 ~]# ll /proc/sys/vm/|wc -l
42

18、4、disable numa zone reclaim with vm.zone_reclaim_mode = 0
//官方建議把vm.zone_reclaim_mode = 0 設置成0
[root@NewCDH-0--141 vm]# cat /proc/sys/vm/zone_reclaim_mode //這個參數系統默認就是0
0
//UMA是什么？NUMA和swap有什么關系？zone_reclaim_mode的具體意義？
zone_reclaim_mode，這個參數定義了NUMA架構下不同的內存回收策略，可以取值0/1/3/4，其中0表示在local內存不夠用的情況下可以去其他的內存區域分配內存；1表示在local內存不夠用的情況下本地先回收再分配；3表示本地回收盡可能先回收文件緩存對象；4表示本地回收優先使用swap回收匿名內存。
19、注意在使用中，可能centos7也安裝了iptables 遇到問題的時候，需要檢查此項 //腳本中沒有寫，需要手動檢查
centos7關閉iptables的命令
/bin/systemctl stop iptables.service
systemctl disable iptables.service

#!/bin/bash #initialization scripts #author majihui #date 20190313 #by hadoop if [ ! -d "/opt/scripts" ]; thenmkdir -p /opt/scripts fiecho "等待1s:#1/判斷centos7還是centos6系統" sleep 1 VERSION=`cat /etc/redhat-release|awk -F " " '{print $3}'|awk -F "." '{print $1}'` if [ "$VERSION" == "6" ];then VERSION='6' echo "centos6" else VERSION='7' echo "centos7" fiecho "-----------------------------分隔符----------------------------------------" echo "等待2s:#2/檢查是否能ping 通百度" sleep 1 echo "1S" sleep 1 echo "2S" PING=`ping -c 3 www.baidu.com` if [ "$?" -ne 0 ];thenecho "ping 不通 baidu 請檢查 /etc/resolv.conf"exit 1 elseecho "能ping 通 baidu" fiecho "-----------------------------分隔符----------------------------------------" echo "等待5s: #3/請檢查hostname 若沒設置請 ctrl+c 退出設置" sleep 1 echo "1S" sleep 2 echo "2S" sleep 3 echo "3S" sleep 4 echo "4S" sleep 5 echo "5S"echo "-----------------------------分隔符----------------------------------------" echo "等待2S：#4/關閉selinux " sleep 2 sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config setenforce 0echo "-----------------------------分隔符----------------------------------------" echo "等待2S:#5/關閉防火墻，并設置關閉開機自啟動" sleep 2 if [ "$VERSION" == "7" ];thensystemctl stop firewalld && systemctl disable firewalld elseservice iptables stop && chkconfig iptables off fiecho "-----------------------------分隔符----------------------------------------" echo "等待1S:#6/查看內存 cpu 硬盤大小" sleep 1 MEM=`free -m` #4.1查看物理CPU個數 physical_id=`cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l` #4.2查看每個物理CPU中core的個數(即核數) cpu_cores=`cat /proc/cpuinfo| grep "cpu cores"| uniq` #4.3查看邏輯CPU的個數 processor=`cat /proc/cpuinfo| grep "processor"| wc -l` echo "$MEM" echo "####################################################" echo "cpu物理個數 physical_id: $physical_id" echo "每個cpu中core的個數(即核數) $cpu_cores" echo "邏輯cpu的個數 processor: $processor" echo "####################################################" #4.4硬盤大小 disk=`df -Th` echo "$disk"echo "-----------------------------分隔符----------------------------------------" echo "等待2S:#7/是否換成阿里云的的源 " sleep 3 cat << EOF**********************1.[change aliyuan]2.[no change aliyuan]3.[exit]pls input the num you want:********************** EOF read -t 30 -p "pls input the num you want:" a [ -n "`echo $a|sed 's#[0-9]##g'`" ] && { } iffuncation(){ if [ $a -eq 1 ];thenecho "change aliyuan"echo "等待3S"sleep 3mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backupif [ "$VERSION" == "7" ];thenwget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repoelsewget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repoyum makecacheecho "等待3S"sleep 3 elif [ $a -eq 2 ];thenecho "no change aliyuan" elif [ $a -eq 3 ];thenexit 1 elseecho "Input error"exit 1 fi } iffuncationecho "-----------------------------分隔符----------------------------------------" echo "等待3S:#8/下載必要的初始化的工具"sleep 3echo "-----------------------------分隔符----------------------------------------" echo "等待3S:#9/修改ip和主機名的對應關系 /etc/hosts"sleep 3 cat > /etc/hosts << EOF 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 EOF if [ "$VERSION" == "7" ];thenecho "`ifconfig|sed -n '2p'|awk -F " " '{print $2}'` $HOSTNAME" >> /etc/hosts else fiecho "-----------------------------分隔符----------------------------------------" echo "等待3S:#10/查看時間 并設置初始化時間" date +%F\ %T ntpdate cn.pool.ntp.org && hwclock -wecho "-----------------------------分隔符----------------------------------------" echo "#11/設置linux的最大文件打開數" ulimit -SHn 65535 ulimit -a #!/bin/bash #initialization scripts #author majihui #date 20190313 #by hadoop if [ ! -d "/opt/scripts" ]; thenmkdir -p /opt/scripts fiecho "等待1s:#1/判斷centos7還是centos6系統" sleep 1 #!/bin/bash #initialization scripts #author majihui #date 20190313 #by hadoop if [ ! -d "/opt/scripts" ]; thenmkdir -p /opt/scripts fiecho "等待1s:#1/判斷centos7還是centos6系統" sleep 1 VERSION=`cat /etc/redhat-release|awk -F " " '{print $3}'|awk -F "." '{print $1}'` if [ "$VERSION" == "6" ];then VERSION='6' echo "centos6" else VERSION='7' echo "centos7" fiecho "-----------------------------分隔符----------------------------------------" echo "等待2s:#2/檢查是否能ping 通百度" sleep 1 echo "1S" sleep 1 echo "2S" PING=`ping -c 3 www.baidu.com` if [ "$?" -ne 0 ];thenecho "ping 不通 baidu 請檢查 /etc/resolv.conf"exit 1 elseecho "能ping 通 baidu" fiecho "-----------------------------分隔符----------------------------------------" echo "等待5s: #3/請檢查hostname 若沒設置請 ctrl+c 退出設置" sleep 1 echo "1S" sleep 2 echo "2S" sleep 3 echo "3S" sleep 4 echo "4S" sleep 5 echo "5S"echo "-----------------------------分隔符----------------------------------------" echo "等待2S：#4/關閉selinux " sleep 2 sed -i 's#SELINUX=enforcing#SELINUX=disabled#g' /etc/selinux/config setenforce 0echo "-----------------------------分隔符----------------------------------------" echo "等待2S:#5/關閉防火墻，并設置關閉開機自啟動" sleep 2 if [ "$VERSION" == "7" ];thensystemctl stop firewalld && systemctl disable firewalld elseservice iptables stop && chkconfig iptables off fiecho "-----------------------------分隔符----------------------------------------" echo "等待1S:#6/查看內存 cpu 硬盤大小" sleep 1 MEM=`free -m` #4.1查看物理CPU個數 physical_id=`cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l` #4.2查看每個物理CPU中core的個數(即核數) cpu_cores=`cat /proc/cpuinfo| grep "cpu cores"| uniq` #4.3查看邏輯CPU的個數 processor=`cat /proc/cpuinfo| grep "processor"| wc -l` echo "$MEM" echo "####################################################" echo "cpu物理個數 physical_id: $physical_id" echo "每個cpu中core的個數(即核數) $cpu_cores" echo "邏輯cpu的個數 processor: $processor" echo "####################################################" #4.4硬盤大小 disk=`df -Th` echo "$disk"echo "-----------------------------分隔符----------------------------------------" echo "等待2S:#7/是否換成阿里云的的源 " sleep 3 cat << EOF**********************1.[change aliyuan]2.[no change aliyuan]3.[exit]pls input the num you want:********************** EOF read -t 30 -p "pls input the num you want:" a [ -n "`echo $a|sed 's#[0-9]##g'`" ] && { } iffuncation(){ if [ $a -eq 1 ];thenecho "change aliyuan"echo "等待3S"sleep 3mv /etc/yum.repos.d/CentOS-Base.repo /etc/yum.repos.d/CentOS-Base.repo.backupif [ "$VERSION" == "7" ];thenwget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repoelsewget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repoyum makecacheecho "等待3S"sleep 3 elif [ $a -eq 2 ];thenecho "no change aliyuan" elif [ $a -eq 3 ];thenexit 1 elseecho "Input error"exit 1 fi } iffuncationecho "-----------------------------分隔符----------------------------------------" echo "等待3S:#8/下載必要的初始化的工具"sleep 3echo "-----------------------------分隔符----------------------------------------" echo "等待3S:#9/修改ip和主機名的對應關系 /etc/hosts"sleep 3 cat > /etc/hosts << EOF 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 EOF if [ "$VERSION" == "7" ];thenecho "`ifconfig|sed -n '2p'|awk -F " " '{print $2}'` $HOSTNAME" >> /etc/hosts else fiecho "-----------------------------分隔符----------------------------------------" echo "等待3S:#10/查看時間 并設置初始化時間" date +%F\ %T ntpdate cn.pool.ntp.org && hwclock -wecho "-----------------------------分隔符----------------------------------------" echo "#11/設置linux的最大文件打開數" ulimit -SHn 65535 ulimit -a if [ "`egrep "* - nofile 65535|* - nproc 65536" /etc/security/limits.conf|wc -l`" == "0" ];thenecho "* - nofile 65535" >> /etc/security/limits.confecho "* - nproc 65536" >> /etc/security/limits.conf elseecho "linux的最大文件打開數 設置成功或者之前已經設置過了" fi sleep 2echo "-----------------------------分隔符----------------------------------------" echo "#12/centos6系統設置grep加顏色別名" if [ "$VERSION" == "6" ];thenif [ "`egrep "alias grep='grep --color=auto'" /etc/profile|wc -l`" == "0" ];thenecho "alias grep='grep --color=auto'" >>/etc/profilesource /etc/profileelseecho "centos6系統設置grep加顏色別名 設置成功或者之前已經設置過了"fifiecho "-----------------------------分隔符----------------------------------------" echo "#13/centos7特有的默認還有進程數限制/etc/security/limits.d/20-nproc.conf" if [ "$VERSION" == "7" ];thensed -i 's#4096#65536#g' /etc/security/limits.d/20-nproc.conf fiecho "-----------------------------分隔符----------------------------------------" echo "#14/禁止內存巨大頁" if [ "`egrep "transparent_hugepage" /etc/rc.d/rc.local |wc -l`" == "0" ];thenecho "echo 'never' >/sys/kernel/mm/transparent_hugepage/enabled" >> /etc/rc.d/rc.localecho "echo 'never' >/sys/kernel/mm/transparent_hugepage/defrag" >> /etc/rc.d/rc.local elseecho "禁止內存巨大頁 設置成功或者之前已經設置過了" fi chmod +x /etc/rc.d/rc.localecho "-----------------------------分隔符----------------------------------------" echo "#15/禁止swap交換" if [ "`egrep "vm.swappiness=0" /etc/sysctl.conf|wc -l`" == "0" ];thenecho "vm.swappiness=0" >> /etc/sysctl.confsysctl -p elseecho "禁止swap交換 設置成功或者之前已經設置過了" fi [root@emm-kafka02-10--175 opt]# sh initialization.sh 等待1s:#1/判斷centos7還是centos6系統 centos7 -----------------------------分隔符---------------------------------------- 等待2s:#2/檢查是否能ping 通百度 1S 2S 能ping 通 baidu -----------------------------分隔符---------------------------------------- 等待5s: #3/請檢查hostname 若沒設置請 ctrl+c 退出設置 1S 2S 3S 4S 5S -----------------------------分隔符---------------------------------------- 等待2S：#4/關閉selinux setenforce: SELinux is disabled -----------------------------華麗分隔符---------------------------------------- 等待2S:#5/關閉防火墻，并設置關閉開機自啟動 Warning: firewalld.service changed on disk. Run 'systemctl daemon-reload' to reload units. -----------------------------華麗分隔符---------------------------------------- 等待1S:#6/查看內存 cpu 硬盤大小total used free shared buff/cache available Mem: 3790 115 3442 8 232 3431 Swap: 3967 0 3967 #################################################### cpu物理個數 physical_id: 4 每個cpu中core的個數(即核數) cpu cores : 1 邏輯cpu的個數 processor: 4 #################################################### Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/centos-root xfs 46G 2.0G 44G 5% / devtmpfs devtmpfs 1.9G 0 1.9G 0% /dev tmpfs tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs tmpfs 1.9G 8.8M 1.9G 1% /run tmpfs tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/sda1 xfs 497M 161M 337M 33% /boot tmpfs tmpfs 380M 0 380M 0% /run/user/0 -----------------------------分隔符---------------------------------------- 等待2S:#7/是否換成阿里云的的源 Loaded plugins: fastestmirror Determining fastest mirrors epel/x86_64/metalink | 5.4 kB 00:00:00 * base: mirrors.cn99.com* epel: fedora.cs.nctu.edu.tw* extras: mirrors.163.com* updates: mirrors.aliyun.com base | 3.6 kB 00:00:00 epel | 4.7 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/6): extras/7/x86_64/primary_db | 180 kB 00:00:00 (2/6): base/7/x86_64/group_gz | 166 kB 00:00:00 (3/6): updates/7/x86_64/primary_db | 2.5 MB 00:00:01 (4/6): epel/x86_64/primary_db | 6.6 MB 00:00:03 (5/6): base/7/x86_64/primary_db | 6.0 MB 00:00:07 (6/6): epel/x86_64/updateinfo | 1.0 MB 00:00:27 Resolving Dependencies --> Running transaction check ---> Package wget.x86_64 0:1.14-15.el7_4.1 will be updated ---> Package wget.x86_64 0:1.14-18.el7 will be an update --> Finished Dependency ResolutionDependencies Resolved===============================================================================================================Package Arch Version Repository Size =============================================================================================================== Updating:wget x86_64 1.14-18.el7 base 547 kTransaction Summary =============================================================================================================== Upgrade 1 PackageTotal download size: 547 k Downloading packages: Delta RPMs disabled because /usr/bin/applydeltarpm not installed. wget-1.14-18.el7.x86_64.rpm | 547 kB 00:00:00 Running transaction check Running transaction test Transaction test succeeded Running transactionUpdating : wget-1.14-18.el7.x86_64 1/2 Cleanup : wget-1.14-15.el7_4.1.x86_64 2/2 Verifying : wget-1.14-18.el7.x86_64 1/2 Verifying : wget-1.14-15.el7_4.1.x86_64 2/2 Updated:wget.x86_64 0:1.14-18.el7 Complete! 等待3秒:**********************1.[change aliyuan]2.[no change aliyuan]3.[exit]pls input the num you want:********************** pls input the num you want:1 change aliyuan 等待3S --2019-03-13 15:14:40-- http://mirrors.aliyun.com/repo/Centos-7.repo Resolving mirrors.aliyun.com (mirrors.aliyun.com)... 117.91.183.229, 117.91.183.231, 117.91.183.233, ... Connecting to mirrors.aliyun.com (mirrors.aliyun.com)|117.91.183.229|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 2523 (2.5K) [application/octet-stream] Saving to: ‘/etc/yum.repos.d/CentOS-Base.repo’100%[=====================================================================>] 2,523 --.-K/s in 0s 2019-03-13 15:14:41 (155 MB/s) - ‘/etc/yum.repos.d/CentOS-Base.repo’ saved [2523/2523]Loaded plugins: fastestmirror Cleaning repos: base epel extras updates Cleaning up everything Maybe you want: rm -rf /var/cache/yum, to also free up space taken by orphaned data from disabled or removed repos Cleaning up list of fastest mirrors Loaded plugins: fastestmirror Determining fastest mirrors epel/x86_64/metalink | 5.8 kB 00:00:00 * base: mirrors.aliyun.com* epel: fedora.cs.nctu.edu.tw* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com base | 3.6 kB 00:00:00 epel | 4.7 kB 00:00:00 extras | 3.4 kB 00:00:00 updates | 3.4 kB 00:00:00 (1/18): base/7/x86_64/group_gz | 166 kB 00:00:00 (2/18): base/7/x86_64/other_db | 2.6 MB 00:00:00 (3/18): epel/x86_64/group_gz | 88 kB 00:00:00 epel/x86_64/filelists_db FAILED https://mirrors.tuna.tsinghua.edu.cn/epel/7/x86_64/repodata/15c9bc6ab4eb0de733e3ffded9b59486d1f560cc170c3b5f50911653154b6620-filelists.sqlite.bz2: [Errno 14] HTTPS Error 404 - Not Found Trying other mirror. To address this issue please refer to the below wiki article https://wiki.centos.org/yum-errorsIf above article doesn't help to resolve this issue please use https://bugs.centos.org/.(4/18): epel/x86_64/updateinfo | 1.0 MB 00:00:00 (5/18): epel/x86_64/prestodelta | 2.4 kB 00:00:00 (6/18): extras/7/x86_64/filelists_db | 231 kB 00:00:00 (7/18): extras/7/x86_64/prestodelta | 47 kB 00:00:00 (8/18): extras/7/x86_64/primary_db | 180 kB 00:00:00 (9/18): extras/7/x86_64/other_db | 118 kB 00:00:00 (10/18): updates/7/x86_64/filelists_db | 2.2 MB 00:00:01 (11/18): updates/7/x86_64/prestodelta | 358 kB 00:00:00 (12/18): epel/x86_64/other_db | 3.2 MB 00:00:01 (13/18): updates/7/x86_64/primary_db | 2.5 MB 00:00:00 epel/x86_64/primary_db FAILED https://mirrors.tuna.tsinghua.edu.cn/epel/7/x86_64/repodata/de7e09448b5d5642db87344f87c2f3b196859a57de980871f867df3a959563ff-primary.sqlite.bz2: [Errno 14] HTTPS Error 404 - Not Found Trying other mirror. (14/18): epel/x86_64/filelists_db | 11 MB 00:00:09 (15/18): epel/x86_64/primary_db | 6.6 MB 00:00:05 base/7/x86_64/primary_db FAILED http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/6614b3605d961a4aaec45d74ac4e5e713e517debb3ee454a1c91097955780697-primary.sqlite.bz2: [Errno 12] Timeout on http://mirrors.cloud.aliyuncs.com/centos/7/os/x86_64/repodata/6614b3605d961a4aaec45d74ac4e5e713e517debb3ee454a1c91097955780697-primary.sqlite.bz2: (28, 'Connection timed out after 30000 milliseconds') Trying other mirror. base/7/x86_64/filelists_db FAILED http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/a0ec5a4708a1026db100d4799c404c9ed48a9371a4bab234a1355f86628a244a-filelists.sqlite.bz2: [Errno 12] Timeout on http://mirrors.aliyuncs.com/centos/7/os/x86_64/repodata/a0ec5a4708a1026db100d4799c404c9ed48a9371a4bab234a1355f86628a244a-filelists.sqlite.bz2: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. (16/18): base/7/x86_64/primary_db | 6.0 MB 00:00:01 updates/7/x86_64/other_db FAILED 1.3 MB/s | 41 MB 00:00:02 ETA http://mirrors.aliyuncs.com/centos/7/updates/x86_64/repodata/9601d8acc7720a70e4ed2a1d0b36dd5848c50fbd1bf8307f31d16906b182b238-other.sqlite.bz2: [Errno 12] Timeout on http://mirrors.aliyuncs.com/centos/7/updates/x86_64/repodata/9601d8acc7720a70e4ed2a1d0b36dd5848c50fbd1bf8307f31d16906b182b238-other.sqlite.bz2: (28, 'Connection timed out after 30001 milliseconds') Trying other mirror. (17/18): base/7/x86_64/filelists_db | 7.1 MB 00:00:03 (18/18): updates/7/x86_64/other_db | 351 kB 00:00:01 Metadata Cache Created 等待3S -----------------------------分隔符---------------------------------------- 等待3S:#8/下載必要的初始化的工具 Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile* base: mirrors.aliyun.com* epel: fedora.cs.nctu.edu.tw* extras: mirrors.aliyun.com* updates: mirrors.aliyun.com Package tree-1.6.0-10.el7.x86_64 already installed and latest version Package lrzsz-0.12.20-36.el7.x86_64 already installed and latest version Package wget-1.14-18.el7.x86_64 already installed and latest version Package rsync-3.1.2-4.el7.x86_64 already installed and latest version Resolving Dependencies --> Running transaction check ---> Package dos2unix.x86_64 0:6.0.3-7.el7 will be installed ---> Package lsof.x86_64 0:4.87-5.el7 will be updated ---> Package lsof.x86_64 0:4.87-6.el7 will be an update ---> Package net-tools.x86_64 0:2.0-0.22.20131004git.el7 will be updated ---> Package net-tools.x86_64 0:2.0-0.24.20131004git.el7 will be an update ---> Package nmap.x86_64 2:6.40-16.el7 will be installed --> Processing Dependency: nmap-ncat = 2:6.40-16.el7 for package: 2:nmap-6.40-16.el7.x86_64 ---> Package ntp.x86_64 0:4.2.6p5-28.el7.centos will be installed --> Processing Dependency: libopts.so.25()(64bit) for package: ntp-4.2.6p5-28.el7.centos.x86_64 ---> Package screen.x86_64 0:4.1.0-0.25.20120314git3c2946.el7 will be installed ---> Package telnet.x86_64 1:0.17-64.el7 will be installed ---> Package vim-enhanced.x86_64 2:7.4.160-4.el7 will be updated ---> Package vim-enhanced.x86_64 2:7.4.160-5.el7 will be an update --> Processing Dependency: vim-common = 2:7.4.160-5.el7 for package: 2:vim-enhanced-7.4.160-5.el7.x86_64 --> Running transaction check ---> Package autogen-libopts.x86_64 0:5.18-5.el7 will be installed ---> Package nmap-ncat.x86_64 2:6.40-16.el7 will be installed ---> Package vim-common.x86_64 2:7.4.160-4.el7 will be updated ---> Package vim-common.x86_64 2:7.4.160-5.el7 will be an update --> Finished Dependency ResolutionDependencies Resolved===============================================================================================================Package Arch Version Repository Size =============================================================================================================== Installing:dos2unix x86_64 6.0.3-7.el7 base 74 knmap x86_64 2:6.40-16.el7 base 3.9 Mntp x86_64 4.2.6p5-28.el7.centos base 549 kscreen x86_64 4.1.0-0.25.20120314git3c2946.el7 base 552 ktelnet x86_64 1:0.17-64.el7 base 64 k Updating:lsof x86_64 4.87-6.el7 base 331 knet-tools x86_64 2.0-0.24.20131004git.el7 base 306 kvim-enhanced x86_64 2:7.4.160-5.el7 base 1.0 M Installing for dependencies:autogen-libopts x86_64 5.18-5.el7 base 66 knmap-ncat x86_64 2:6.40-16.el7 base 206 k Updating for dependencies:vim-common x86_64 2:7.4.160-5.el7 base 5.9 MTransaction Summary =============================================================================================================== Install 5 Packages (+2 Dependent packages) Upgrade 3 Packages (+1 Dependent package)Total download size: 13 M Downloading packages: Delta RPMs disabled because /usr/bin/applydeltarpm not installed. (1/11): autogen-libopts-5.18-5.el7.x86_64.rpm | 66 kB 00:00:00 (2/11): dos2unix-6.0.3-7.el7.x86_64.rpm | 74 kB 00:00:00 (3/11): lsof-4.87-6.el7.x86_64.rpm | 331 kB 00:00:00 (4/11): net-tools-2.0-0.24.20131004git.el7.x86_64.rpm | 306 kB 00:00:00 (5/11): nmap-ncat-6.40-16.el7.x86_64.rpm | 206 kB 00:00:00 (6/11): nmap-6.40-16.el7.x86_64.rpm | 3.9 MB 00:00:00 (7/11): ntp-4.2.6p5-28.el7.centos.x86_64.rpm | 549 kB 00:00:00 (8/11): screen-4.1.0-0.25.20120314git3c2946.el7.x86_64.rpm | 552 kB 00:00:00 (9/11): telnet-0.17-64.el7.x86_64.rpm | 64 kB 00:00:00 (10/11): vim-enhanced-7.4.160-5.el7.x86_64.rpm | 1.0 MB 00:00:00 (11/11): vim-common-7.4.160-5.el7.x86_64.rpm | 5.9 MB 00:00:02 --------------------------------------------------------------------------------------------------------------- Total 3.3 MB/s | 13 MB 00:00:03 Running transaction check Running transaction test Transaction test succeeded Running transactionUpdating : 2:vim-common-7.4.160-5.el7.x86_64 1/15 Installing : 2:nmap-ncat-6.40-16.el7.x86_64 2/15 Installing : autogen-libopts-5.18-5.el7.x86_64 3/15 Installing : ntp-4.2.6p5-28.el7.centos.x86_64 4/15 Installing : 2:nmap-6.40-16.el7.x86_64 5/15 Updating : 2:vim-enhanced-7.4.160-5.el7.x86_64 6/15 Installing : dos2unix-6.0.3-7.el7.x86_64 7/15 Installing : screen-4.1.0-0.25.20120314git3c2946.el7.x86_64 8/15 Updating : lsof-4.87-6.el7.x86_64 9/15 Updating : net-tools-2.0-0.24.20131004git.el7.x86_64 10/15 Installing : 1:telnet-0.17-64.el7.x86_64 11/15 Cleanup : 2:vim-enhanced-7.4.160-4.el7.x86_64 12/15 Cleanup : 2:vim-common-7.4.160-4.el7.x86_64 13/15 Cleanup : lsof-4.87-5.el7.x86_64 14/15 Cleanup : net-tools-2.0-0.22.20131004git.el7.x86_64 15/15 Verifying : 1:telnet-0.17-64.el7.x86_64 1/15 Verifying : 2:vim-enhanced-7.4.160-5.el7.x86_64 2/15 Verifying : 2:nmap-6.40-16.el7.x86_64 3/15 Verifying : net-tools-2.0-0.24.20131004git.el7.x86_64 4/15 Verifying : ntp-4.2.6p5-28.el7.centos.x86_64 5/15 Verifying : autogen-libopts-5.18-5.el7.x86_64 6/15 Verifying : lsof-4.87-6.el7.x86_64 7/15 Verifying : screen-4.1.0-0.25.20120314git3c2946.el7.x86_64 8/15 Verifying : 2:nmap-ncat-6.40-16.el7.x86_64 9/15 Verifying : 2:vim-common-7.4.160-5.el7.x86_64 10/15 Verifying : dos2unix-6.0.3-7.el7.x86_64 11/15 Verifying : net-tools-2.0-0.22.20131004git.el7.x86_64 12/15 Verifying : 2:vim-enhanced-7.4.160-4.el7.x86_64 13/15 Verifying : lsof-4.87-5.el7.x86_64 14/15 Verifying : 2:vim-common-7.4.160-4.el7.x86_64 15/15 Installed:dos2unix.x86_64 0:6.0.3-7.el7 nmap.x86_64 2:6.40-16.el7 ntp.x86_64 0:4.2.6p5-28.el7.centos screen.x86_64 0:4.1.0-0.25.20120314git3c2946.el7 telnet.x86_64 1:0.17-64.el7 Dependency Installed:autogen-libopts.x86_64 0:5.18-5.el7 nmap-ncat.x86_64 2:6.40-16.el7 Updated:lsof.x86_64 0:4.87-6.el7 net-tools.x86_64 0:2.0-0.24.20131004git.el7 vim-enhanced.x86_64 2:7.4.160-5.el7 Dependency Updated:vim-common.x86_64 2:7.4.160-5.el7 Complete! -----------------------------分隔符---------------------------------------- 等待3S:#9/修改ip和主機名的對應關系 /etc/hosts -----------------------------分隔符---------------------------------------- 等待3S:#10/查看時間 并設置初始化時間 2019-03-13 15:15:55 13 Mar 15:22:27 ntpdate[19363]: step time server 139.199.215.251 offset 383.664488 sec -----------------------------分隔符---------------------------------------- #11/設置linux的最大文件打開數 core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 15066 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 65535 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 102400 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited -----------------------------分隔符---------------------------------------- #12/centos6系統設置grep加顏色別名 -----------------------------分隔符---------------------------------------- #13/centos7特有的默認還有進程數限制/etc/security/limits.d/20-nproc.conf -----------------------------分隔符---------------------------------------- #14/禁止內存巨大頁 -----------------------------分隔符---------------------------------------- #15/禁止swap交換 vm.swappiness = 0 [root@localhost ~]# systemctl daemon-reload

最后，執行以下reboot
此腳本 centos6 和centos7 通用

轉載于:https://blog.51cto.com/14199566/2363430

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