update

linux/cobbler.md

@@ -1,5 +1,9 @@
 # centos7 Cobbler
 
+https://blog.csdn.net/qq_36441659/article/details/104965639
+
+https://askubuntu.com/questions/476508/why-ubuntu-server-asks-to-insert-a-cd-rom-when-installed-from-pxe
+
 [TOC]
 
 ## 安装
@@ -7,7 +11,16 @@
 ```bash
 # cobbler 在epel源中
 wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
-yum install cobbler xinetd dhcpd
+yum install cobbler xinetd dhcp bind cobbler-web debmirror pykickstart fence-agents
+
+systemctl enable cobblerd httpd xinetd dhcpd
+systemctl start cobblerd httpd xinetd dhcpd
+
+# 需要关闭seliux和防火墙
+vim /etc/selinux/config
+systemctl stop firewalld.service
+systemctl disable firewalld.service
+reboot
 ```
 
 
@@ -49,15 +62,7 @@ subnet 192.168.1.0 netmask 255.255.255.0 {
 ```
 
 ```bash
-systemctl enable cobbler httpd xinetd
-systemctl start cobbler httpd xinetd
 
-# 需要关闭seliux和防火墙
-vim /etc/selinux/config
-
-systemctl stop firewalld.service
-systemctl disable firewalld.service
-reboot
 
 # 检测 会提示一些操作， 根据需要去做
 cobbler check
@@ -102,8 +107,11 @@ cobbler sync
 # http://mirrors.aliyun.com/centos 下载镜像， 下载minimal版方便测试
 mkdir /mnt/centos7
 mount -t iso9660 -o loop,ro ~/CentOS-7-x86_64-Minimal-2003.iso /mnt/centos7
+
 # 导入
 cobbler import --name=centos7 --path=/mnt/centos7
+cobbler import --name=u20 --bread=ubuntu --os-version=focal  --path=/mnt/u20 
+cobbler signature update
 
 ## profile url http://192.168.10.60/cblr/svc/op/ks/profile/centos7-x86_64
 ## 访问这个链接可以查看完整版的ks文件， 也可以验证ks是否正确
@@ -343,6 +351,13 @@ cobbler profile report --name=centos7-x86_64
 ```
 
 
+#### ubuntu20-server
+
+```bash
+# 需要将该文件作为initrd文件 否则会出现cd
+/install/netboot/ubuntu-installer/amd64/initrd.gz
+/var/lib/tftpboot/images/u20
+```
 
 
 

linux/net.sh

@@ -8,18 +8,20 @@
 
 #!/bin/sh
 LANG=""
+    up_time0=`ip -s link show $1 | grep "TX" -A 1 | sed -n '2p' | awk '{print $1}'`
+    down_time0=`ip -s link show $1 | grep "RX" -A 1 | sed -n '2p' | awk '{print $1}'`
 while true
 do
-    up_time1=`ifconfig $1 | grep "TX packets" | awk '{print $5}'`
-    down_time1=`ifconfig $1 | grep "RX packets" | awk '{print $5}'`
+    up_time1=`ip -s link show $1 | grep "TX" -A 1 | sed -n '2p' | awk '{print $1}'`
+    down_time1=`ip -s link show $1 | grep "RX" -A 1 | sed -n '2p' | awk '{print $1}'`
     sleep 1
     clear
-    up_time2=`ifconfig $1 | grep "TX packets" | awk '{print $5}'`
-    down_time2=`ifconfig $1 | grep "RX packets" | awk '{print $5}'`
-    up_time=`expr $up_time2 - $up_time1`
-    down_time=`expr $down_time2 - $down_time1`
-    up_time=`expr $up_time / 1024`
-    down_time=`expr $down_time / 1024`
-    echo 上传速度: $up_time KB/s
-    echo 下载速度: $down_time KB/s
+    up_time2=`ip -s link show $1 | grep "TX" -A 1 | sed -n '2p' | awk '{print $1}'`
+    down_time2=`ip -s link show $1 | grep "RX" -A 1 | sed -n '2p' | awk '{print $1}'`
+    up_time=`expr $[(up_time2 - up_time1) / 1024]`
+    down_time=`expr $[(down_time2 - down_time1) / 1024]`
+    up_time_all=$(expr $[(up_time2 - up_time0) / 1024 / 1024])
+    down_time_all=$(expr $[(down_time2 - down_time0) / 1024 / 1024])
+    echo 上传速度: $up_time KB/s   $up_time_all MB
+    echo 下载速度: $down_time KB/s $down_time_all MB
 done

linux/zsh.md

@@ -6,7 +6,8 @@ sh -c "$(curl -fsSL https://raw.github.com/robbyrussell/oh-my-zsh/master/tools/i
 sh -c "$(curl -fsSL https://public.veypi.com/install_zsh.sh)"
 
 echo 'PROMPT=%m\ $PROMPT' >> ~/.zshrc
-echo 'DISABLE_AUTO_UPDATE="true"' >> ~/.zshrc
+sed -i '1i\DISABLE_AUTO_UPDATE="true"' ~/.zshrc
+
 
 chsh -s /bin/zsh
 sudo reboot -h now