实用笔记 – Lofyer Archives

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WebFramework:

搜索Tab

批量替换

cmake 配置安装完opencv后，将安装路径中到lib/pkg-config/opencv.pc复制到/usr/lib/pkg-config，然后可以进行pkg-config 查找

gnome3任务栏快捷方式的存放位置拖到浏览器或者终端里你就看见了。。

curl POST

mysql grant

Opensuse滚动升级版 Tumbleweed

RESTClient

owncloud repo

bVNC build

IPA ADD-USER

NTP server

rsync

CentOS Smartcard

zathura

ssh without password

ssh to a new host without key checking promption

debian offcie乱码

debian virt-viewer with spice

Better DNS

audit log

memcached

disable TSO GSO to improve virtio-net

disable PackageKit in Fedora

推荐一种工作方式

crt & key to pem

wireless relay for tomata

owncloud repo

When your vm has 2 ethernet, DO noticed which one is the default gateway, or you will fail in ROUTER PORT FORWARDING.

Delete RAID info in your disk

Postgresql recovery when xlog failed

解决mysql＋php中文显示问号问题

Mysql delete duplicated rows

pip upgrade all

wget 递归下载

修改gem源

使用extundelete恢复rm -fr数据

使用TestDisk/PhotoRec恢复分区/数据

WordPress 摘要字数搜索关键字excerpt_length

Eclipse multiuser

get cer and key out of pfx

openssl/gpg encrypt/decrypt

ssh port forward

Export private key of IIS that cannot be exported

iptables route to local pc

Ubuntu ap-hotspot PPA

恢复IO ERROR文件

QEMU LSI SCSI

yum remove nodeps

File too large

HTTP REFRESH

AUTORECONF

RPi x11vnc auto start and prevent screen from sleeping

Crawl date yesterday

Simple PHP server

MacOS reinstall

MySQL select items yesterday

MACOS all source

wp-github all repos limit

修改iconic右侧widget超链接颜色

CPU IPC usage 4-wide CPU

ens/enp rename to eth0

Change mysql database or table encoding

Google Pixel 2 network "X" symbol

WebFramework:

Django
Cappuccino->mockingbird

搜索Tab

grep -P "t"

批量替换

sed -i "s/qwe/asd/g" `grep -rl "qwe"`

cmake 配置安装完opencv后，将安装路径中到lib/pkg-config/opencv.pc复制到/usr/lib/pkg-config，然后可以进行pkg-config 查找

gnome3任务栏快捷方式的存放位置拖到浏览器或者终端里你就看见了。。

curl POST

curl -X POST -d '4142430A02000' 
http://user:pass@myhost/hudson/job/_jobName_/postBuildResult

curl -X POST -d @myfilename http://user:pass@myhost/hudson/job/_jobName_/postBuildResult

ddwrt 内网不能访问内网域名

iptables -t nat -I POSTROUTING -o br0 -s 192.168.0.188/24 -d 192.168.0.188/24 -j MASQUERADE

vpn的内网的问题

iptables -t nat -A POSTROUTING -s 10.8.0.0/24 -o eth0 -j SNAT --to-source 70.8.7.6

iptables -t nat -A POSTROUTING -o eth0 -s 172.16.1.0/24 -j MASQUERADE

delete git branch

git push origin :yourbranch

ipa client reinstall

删除/etc/ipa/ca.crt证书

fedora制作安装cd

#!/bin/bash
livecd-creator --config=/usr/share/spin-kickstarts/fedora-livecd-desktop.ks \
--fslabel=Test \
--tmpdir=/root/iso/tmp \
--cache=/root/iso/cache \
--nocleanup \
--cacheonly #为节约下载时间可在以后制作时忽略

mysql grant

grant all privileges on *.* to root@'%' identified by '123456';
flush privileges;

打开kvm nested参数

cat /sys/module/kvm_intel/parameters/nested

为N则

modprobe -r kvm-intel
modprobe kvm-intel nested=1

Fedora滚动升级版 Rawhide

yum install fedora-release-rawhide
yum-config-manager --disable fedora updates updates-testing
yum-config-manager --enable rawhide
yum update yum
yum --releasever=rawhide distro-sync --nogpgcheck

or

dnf upgrade --refresh
dnf install dnf-plugin-system-upgrade
dnf system-upgrade download --refresh --releasever=rawhide --allowerasing
dnf system-upgrade reboot

Opensuse滚动升级版 Tumbleweed

zypper ar --refresh http://download.opensuse.org/repositories/openSUSE:/Tumbleweed/standard/ Tumbleweed
zypper ar --refresh http://download.opensuse.org/distribution/openSUSE-current/repo/oss/ 'openSUSE Current OSS'
zypper ar --refresh http://download.opensuse.org/distribution/openSUSE-current/repo/non-oss/ 'openSUSE Current non-OSS'
zypper ar --refresh http://download.opensuse.org/update/openSUSE-current/ 'openSUSE Current updates'
zypper ar --refresh http://download.opensuse.org/update/openSUSE-non-oss-current/ 'openSUSE Current non-OSS updates' 
zypper dup

vs2012修复补丁

由于升级.net 4.5会出现vs2012部分项目失败，可以打这个补丁修复
Microsoft Visual Studio 2012 更新 (KB2781514)

RESTClient

针对RESTful的API可以使用这个工具
http://restclient.org

dl-ssl.google.com

74.125.237.1

owncloud repo

http://software.opensuse.org/download/package?project=isv:ownCloud:devel&package=owncloud-client

android google play

cp /data/app/googleplay /system/app/

获取Gravatar头像

curl http://www.gravatar.com/avatar/`echo -n me@mydomain.com | md5sum` > gravatar.jpg

Maven insecure SSL

-Dmaven.wagon.http.ssl.insecure=true -Dmaven.wagon.http.ssl.allowall=true

bVNC build

FreeRDP: checkout dbbb341; cmake .; ant release
Singed keystore: keytool -genkey -alias android.keystore -keyalg RSA -validity 20000 -keystore android.keystore
http://www.mail-archive.com/spice-devel@lists.freedesktop.org/msg13763.html

IPA ADD-USER

#!/bin/bash
echo -e "pswd4admin\n" | kinit admin
echo -e "$1\n$1\n$1\n" | ipa user-add
echo -e "$1\n$1\n" | ipa passwd $1
sleep 1
echo -e "$1\n$1\n$1\n" | kinit $1

NTP server

server 192.168.1.11 mask 255.255.0.0 nomodify
启动ntpd后要等个几分钟，client才能去同步，否则报错说未找到合适的ntp服务器

rsync

rsync -zvrtopgal -e ssh --delete --stats --progress --exclude 'ignore.txt' root@lofyer.org:/var/log /home/lofyer/lofyer.org/

CentOS Smartcard

SmartCard service:
openct
pcscd

zathura

很好的PDF阅读器

ssh without password

# Generate rsa key pair without passphrase
[demo@A ~]$ ssh-keygen -t rsa
# Copy pub key to B
[demo@A ~]$ cat .ssh/id_rsa.pub | ssh alpha@B 'cat >> .ssh/authorized_keys2'
# Add private key to A
[demo@A ~]$ ssh-add  ~/.ssh/id_rsa
or just
[demo@A ~]$ ssh-copy-id alpha@B

ssh to a new host without key checking promption

# vim /etc/ssh/ssh_config
...
StrictHostKeyChecking no
...

debian offcie乱码

安装文泉逸字体
apt-get install fonts-wenquanyi

debian virt-viewer with spice

deb http://mirrors.163.com/debian/ unstable main
deb-src http://mirrors.163.com/debian/ unstable main

deb http://security.debian.org/ unstable/updates main
deb-src http://security.debian.org/ unstable/updates main

# unstable-updates, previously known as 'volatile'
deb http://mirrors.163.com/debian/ unstable-updates main
deb-src http://mirrors.163.com/debian/ unstable-updates main
deb http://apt.wxwidgets.org/ unstable-wx main
deb-src http://apt.wxwidgets.org/ unstable-wx main

Better DNS

dns1: 199.91.73.222
dns2: 8.8.8.8

audit log

Modify /etc/audit/audit.conf to 8192 or bigger.

memcached

PHP

# apt-get install memcached php5-memcached

modify /etc/php5/conf.d/memcached.ini

disable TSO GSO to improve virtio-net

# ethtool -K eth0 gso off
# ethtool -K eth0 tso off

disable PackageKit in Fedora

/etc/yum/pluginconf.d/refresh-packagekit.conf

 enabled=0

crt & key to pem

openssl x509 -inform DER -outform PEM -in server.crt -out server.crt.pem
openssl rsa -inform DER -outform PEM -in server.key -out server.key.pem
cat server.crt.pem server.key.pem >> server.pem

wireless relay for tomata

设置无线中继时确保主路由和从路由的SSID、密码、加密方式一致，不要使用WPA/WPA-2混合模式

libvirt password

# saslpasswd2 -a libvirt root

netcat(nc) tips

大传输文件(file transfer)

server: nc -l 5555 < file_to_copy
client: nc server_ip 5555 > new_file

聊天(chat)

client1: nc -l 5555
client2: nc server_ip 5555

udp connection

server: nc -4 -u -l 5555
clinet: nc -4 -u localhost 5555

owncloud repo

[isv_ownCloud_community]
name=Latest stable community release of ownCloud (CentOS_CentOS-6)
type=rpm-md
baseurl=http://download.opensuse.org/repositories/isv:/ownCloud:/community/CentOS_CentOS-6/
gpgcheck=1
gpgkey=http://download.opensuse.org/repositories/isv:/ownCloud:/community/CentOS_CentOS-6/repodata/repomd.xml.key
enabled=1

gnome terminal proxy

$ ssh -ND 7070 yourname@yourserver
$ gconftool-2 -R /system/proxy # show configuration
$ gconftool-2 -s /system/proxy/socks_host -t int 127.0.0.1
$ gconftool-2 -s /system/proxy/socks_port -t int 7070
$ gconftool-2 -s /system/proxy/mode -t string manual # enable
$ gconftool-2 -s /system/proxy/mode -t string none # disable

update xcode cmd

# xcode-select --install

Test linux watchdog

# echo c > /proc/sysrq-trigger

Bash环境变量漏洞检测

env x='() { :;}; echo asdasd' bash -c "echo asd"

maven socks5 proxy

-DsocksProxyHost=127.0.0.1 -DsocksProxyPort=7070

When your vm has 2 ethernet, DO noticed which one is the default gateway, or you will fail in ROUTER PORT FORWARDING.

Delete RAID info in your disk

# dmraid -n /dev/sda
  DDF1 Anchor at 12345678
# dd if=/dev/zero of=/dev/sda seek=12345678 bs=512 count=1

Postgresql recovery when xlog failed

$ pg_resetxlog -f -x 0x9A00000 -m 0x10000 -O 0x10000 -l 0x1,0xB67,0x58 -D /var/lib/pgsql/data
or
$ pg_resetxlog -f /var/lib/pg_sql/data
Transaction log reset

解决mysql＋php中文显示问号问题

比如在vtigercrm，zabbix中

创建utf8排序的数据库即可
# mysql
> create database mydb DEFAULT CHARSET utf8 COLLATE utf8_general_ci;

Mysql delete duplicated rows

delete from posts where id not in (select * from (select max(n.id) from posts n group by n.title) x);

OR

create table new as select * from posts where 1 group by url;
rename table new master;

pip upgrade all

pip freeze --local | grep -v '^\-e' | cut -d = -f 1  | xargs -n1 pip install -U

wget 递归下载

wget -c -r -np -k -L -p http://example.com/dir0/

修改gem源

$ gem sources --remove https://rubygems.org/
$ gem sources -a https://ruby.taobao.org/
$ gem sources -l
*** CURRENT SOURCES ***

https://ruby.taobao.org
# 请确保只有 ruby.taobao.org

使用extundelete恢复rm -fr数据

从http://extundelete.sourceforge.net/下载源码，安装efs2progs-devel并编译。

# mount /dev/sdb2 /mnt -o ro
# extundelete /dev/sdb2 --restore-files relative-path-to-files --after 20140404
OR
# extundelete /dev/sdb2 --restore-all

使用TestDisk/PhotoRec恢复分区/数据

从http://www.cgsecurity.org/wiki/TestDisk下载TestDisk，解压后会发现源码以及静态编译文件，直接执行即可，其中TestDisk恢复分区，PhotoRec恢复图片文件。

WordPress 摘要字数搜索关键字excerpt_length

Eclipse multiuser

Add following code to your eclipse/configuration/config.ini

osgi.configuration.area=@user.home/Eclipse/configuration
osgi.sharedConfiguration.area=/opt/eclipse/configuration
osgi.configuration.cascaded=true

get cer and key out of pfx

openssl pkcs12 -in domain.pfx -clcerts -nokeys -out domain.cer
openssl pkcs12 -in domain.pfx -nocerts -nodes  -out domain.key

openssl/gpg encrypt/decrypt

$ echo Hi | openssl enc -aes-128-cbc -a -salt -pass pass:wtf
U2FsdGVkX18qAdhqop1SffsewHue6EOPNKv9dXc/0rI=
$ echo U2FsdGVkX18qAdhqop1SffsewHue6EOPNKv9dXc/0rI= | openssl enc -aes-128-cbc -a -d -salt -pass pass:wtf
Hi

OR

# generate a 2048-bit RSA key and store it in key.txt
openssl genrsa -out key.txt 2048
# encrypt "hello world" using the RSA key in key.txt
echo "hello world" | openssl rsautl -inkey key.txt -encrypt >output.bin
# decrypt the message and output to stdout
openssl rsautl -inkey key.txt -decrypt tempfile
gpg --decrypt 
ssh port forward
# Local Forwarding, with -g to share the local port with other hosts
(localpc)$ ssh -g -L 2222:localhost:22 root@lofyer.org
# ssh to localhost:2222 to connect lofyer.org
(localpc)$ ssh -lroot -p 2222 localhost

# Remote Forwarding
(localpc)$ ssh -R -L 2222:localhost:22 root@lofyer.org
# On host lofyer.org, ssh to localhost:2222 to connect localpc.
(lofyer.org)$ ssh localhost -p 2222

# Mixed, localpc:22->lofyer.org:2222
# On lofyer.org we make a tunnel(2222) to localpc:22
(localpc)$ ssh -R 2222:localhost:22 lofyer.org
# Make a local tunnel(3333) listening on all interface to localpc:2222
(lofyer.org)$ ssh -g -L 3333:localhost:2222 localhost
# ssh to lofyer.org:3333 to connect localpc:22
(localpc) ssh lofyer.org -p 3333

# Dynamic Forwarding, with -CN to compress data and close terminal input.
# To start a SOCKS v4/v5 server on localhost:7777
# Then you can use this as a proxy for your browser.
(localpc)$ ssh -CND 7777 root@lofyer.org
Export private key of IIS that cannot be exported
1. git clone https://github.com/iSECPartners/jailbreak-Windows.git

2. Run mcc.msc, add Cert, save this MCC as a file(i.e. aaa).

3. Run jailbreak64.exe mcc.msc aaa

4. Then you can export the private key from the cert.
iptables route to local pc
iptables -t nat -A PREROUTING -p tcp  --dport 5060:5081 -j DNAT --to-destination 192.168.122.222:5060:5081
Change vm root password
virt-sysprep --root-password password:123456 -a os.img
Ubuntu ap-hotspot PPA
sudo add-apt-repository ppa:nilarimogard/webupd8 
sudo apt-get update
sudo apt-get install ap-hotspot
恢复IO ERROR文件
dd if=ioerror.file of=file bs=1M conv=noerror
QEMU LSI SCSI
qemu-kvm -m 1024 -drive file=centos58-RAW.img,index=0,if=scsi,format=raw -boot c -net nic -net user -nographic -vnc :1 -option-rom 8xx_64.rom,bootindex=1
lsi_bios 下载
yum remove nodeps
rpm -e --nodpes PKG
yum install PKG

File too large
ulimit -n 102400
ulimit -f 102400

HTTP REFRESH
<meta HTTP-EQUIV="REFRESH" content="0; url=/SOGo/">
AUTORECONF
autoreconf -i
RPi x11vnc auto start and prevent screen from sleeping
pi@raspberrypi:~ $ cat .config/lxsession/LXDE-pi/autostart 
@lxpanel --profile LXDE-pi
@pcmanfm --desktop --profile LXDE-pi
@xscreensaver -no-splash
x11vnc -auth /home/pi/.Xauthority -display :0
@xset s noblank
@xset s off
@xset -dpms
Crawl date yesterday
select id,title,content,url,date_format(str_to_date(date, '%d-%M-%Y'), '%Y%m%d') as date_new from posts where date_format(str_to_date(date, '%d-%M-%Y'), '%Y%m%d')=curdate()+0-1;
Simple PHP server
php -S 127.0.0.1:80 -t .
MacOS reinstall
# Format U disk at first with 区分大小写，日志式
# /Volume/Install\ OSX/Install\ OSX.app/Contents/Resources/createinstallmedia --volume /Volume/install --applicationpath /Volume/Install\ OSX/OSX.app
MySQL select items yesterday
select id,title,content,url,date_format(str_to_date(date, '%d-%M-%Y'), '%Y%m%d') as date_new from posts where date_format(str_to_date(date, '%d-%M-%Y'), '%Y%m%d')=curdate()+0-1;
MACOS all source
# macOS 允许所有来源
 sudo spctl --master-disable
wp-github all repos limit
120    public function get_repositories() {
121    $contents = $this->get_response('users/' . $this->username . '/repos?per_page=100');
修改iconic右侧widget超链接颜色
.widget-area .widget a {
	/*color: #757575;*/
	text-decoration:none;
	font-size: 98%;
}
CPU IPC usage 4-wide CPU
perf stat -a -- sleep 10
Linux, when adding a new disc
First find your host bus number

grep mpt /sys/class/scsi_host/host?/proc_name

Which should return a line like

/sys/class/scsi_host/host0/proc_name:mptspi

where host0 is the relevant field.

use this to rescan the bus with the following command

echo "- - -" > /sys/class/scsi_host/host0/scan

In the above command the the hyphens represent controller,channel,lun, so – – – indicates all controllers, all channels and all luns should be scanned.
ens/enp rename to eth0
Edit /etc/default/grub
At the end of GRUB_CMDLINE_LINUX line append "net.ifnames=0 biosdevname=0"
Save the file
Type "grub2-mkconfig -o /boot/grub2/grub.cfg"
Type "reboot"
Change mysql database or table encoding
SELECT neutron_ml2;
ALTER DATABASE neutron_ml2 CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE standardattributes CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

Or if you're still on MySQL 5.5.2 or older which didn't support 4-byte UTF-8, use utf8 instead of utf8mb4:

ALTER DATABASE databasename CHARACTER SET utf8 COLLATE utf8_unicode_ci;
ALTER TABLE tablename CONVERT TO CHARACTER SET utf8 COLLATE utf8_unicode_ci;

Google Pixel 2 network "X" symbol
./adb shell "settings put global captive_portal_https_url https://captive.v2ex.co/generate_204";