https://linuxhandbook.com/umount-target-busy/
2023年12月26日 星期二
firefox add-on
1. https://support.mozilla.org/en-US/kb/unable-install-add-ons-extensions-or-themes
2. use live host
LiveHosts
2023年11月29日 星期三
zabbix macro and his function
all view
https://www.zabbix.com/documentation/current/en/manual/config/macros
# macro
https://www.zabbix.com/documentation/current/en/manual/config/macros
# macro with function
https://www.zabbix.com/documentation/current/en/manual/config/macros/macro_functions
2023年10月17日 星期二
2023年10月11日 星期三
fluentd log-driver
https://blog.boatswain.io/zh/post/docker-container-log-rotation/
https://gdevillele.github.io/engine/admin/logging/fluentd/
https://hub.docker.com/r/fluent/fluent-bit/
2023年10月4日 星期三
zabbix storage
查看磁盘容量息的key值：vfs.fs.size[/,pfree]
vfs.fs.size[/,pfree]：取/领域的剩余空间率。p是percentage，
vfs.fs.size[/,free]：取/领域的剩余空间。对应的单位就是B（这里的意思是Byte）
vfs.fs.size[/,pused]：取/领域的使用空间率。
vfs.fs.size[/,used]：取/领域的使用空间。
如果要创建触发器表达式可以使用{ZABBIX-CC:vfs.fs.size[/,pfree].last(0)}<20
參考 https://blog.51cto.com/ityunwei2017/1864128
2023年9月5日 星期二
2023年8月8日 星期二
python star symbol is unpacking
# explain
This PEP proposes extended usages of the * iterable unpacking operator and ** dictionary unpacking operators to allow unpacking in more positions, an arbitrary number of times, and in additional circumstances. Specifically, in function calls, in comprehensions and generator expressions, and in displays.
https://www.geeksforgeeks.org/packing-and-unpacking-arguments-in-python/
https://peps.python.org/pep-0448/#id6
# example
print( [i for i in [*[1,2], 1]] )
# [1, 2, 1]
print( [i for i in [[1,2], 1]] )
# [[1, 2], 1]
def hello(*attrs):
for s in attrs:
print(s)
hello([1,2,3])
#[1, 2, 3]
hello(*[1,2,3])
#1
#2
#3
hello(1,2,3)
#1
#2
#3
2023年7月17日 星期一
Rabbitmq REST API
1. https://rawcdn.githack.com/rabbitmq/rabbitmq-server/v3.12.1/deps/rabbitmq_management/priv/www/api/index.html
2. https://www.rabbitmq.com/vhosts.html
2023年7月11日 星期二
airflow api
# seting the
airflow_api_auth_backends: 'airflow.api.auth.backend.basick_auth'
# Test
curl -X GET --user "airflow:1qaz2WSX" "https://airflow-dev.armor.hinet.net/api/v1/pools"
curl -X PATCH 'https://airflow-dev.armor.hinet.net/api/v1/dags/report_backup?update_mask=is_paused' \
-H 'Content-Type: application/json' \
--user "airflow:1qaz2WSX" \
-d '{
"is_paused": true
}'
# ref setting airflow.cfg
airflow_api_auth_backends: 'airflow.api.auth.backend.basick_auth
# https://stackoverflow.com/questions/61329923/apache-airflow-rest-api-authentication
# https://airflow.apache.org/docs/apache-airflow/1.10.12/howto/set-config.html'
#https://airflow-dev.armor.hinet.net/redoc
2023年7月4日 星期二
cenos7 selinux close
setenforce 0
# good
https://wiki.gentoo.org/wiki/SELinux/Tutorials/Where_to_find_SELinux_permission_denial_details
#
https://www.ltsplus.com/linux/disable-selinux
2023年7月3日 星期一
2023年7月2日 星期日
centos7 open the firewall
#network tools
sudo yum install telnet
# fireall stop
systemctl stop firewalld
systemctl status firewalld
#
# add the port
sudo firewall-cmd --zone=public --add-port=10050/tcp --permanent
sudo firewall-cmd --reload
sudo iptables-save | grep 10050
#ref
https://www.thegeekdiary.com/how-to-open-a-ports-in-centos-rhel-7/
2023年6月26日 星期一
Centos7 install sshd
3 sudo yum install openssh opessh-server
5 vi /etc/ssh/sshd_config
7 systemctl restart sshd.service
8 systemctl status sshd.service
9 sudo systemctl enable sshd.service
ref:
https://www.brilliantcode.net/124/centos-7-install-and-configure-ssh/
https://phoenixnap.com/kb/how-to-enable-ssh-centos-7
2023年6月16日 星期五
Machine learning on line demo or good paper
1. svm
https://greitemann.dev/svm-demo
2. tensor flow
https://playground.tensorflow.org/#activation=linear&batchSize=10&dataset=gauss®Dataset=reg-plane&learningRate=0.03®ularizationRate=0&noise=0&networkShape=&seed=0.96726&showTestData=false&discretize=false&percTrainData=50&x=true&y=true&xTimesY=true&xSquared=false&ySquared=false&cosX=false&sinX=false&cosY=false&sinY=false&collectStats=false&problem=classification&initZero=false&hideText=false
3. percentage
https://medium.com/jameslearningnote/%E8%B3%87%E6%96%99%E5%88%86%E6%9E%90-%E6%A9%9F%E5%99%A8%E5%AD%B8%E7%BF%92-%E7%AC%AC3-2%E8%AC%9B-%E7%B7%9A%E6%80%A7%E5%88%86%E9%A1%9E-%E6%84%9F%E7%9F%A5%E5%99%A8-perceptron-%E4%BB%8B%E7%B4%B9-84d8b809f866
https://ithelp.ithome.com.tw/articles/10215769
2023年5月31日 星期三
nfdump command quickly
# quickly
https://yurisk.info/2020/09/20/nfdump-netflow-usage-examples-cookbook/
#
https://nfdump.sourceforge.net/
#
https://manpages.ubuntu.com/manpages/xenial/man1/nfdump.1.html
2023年5月26日 星期五
ubuntu install and some services
1. https://blog.gtwang.org/linux/install-ubuntu-linux-to-usb-stick/
2. install nfs
https://linuxhint.com/install-and-configure-nfs-server-ubuntu-22-04/
python effective and data
https://www.readfog.com/a/1686829807819657216
# python sqlaclemy
https://docs.sqlalchemy.org/en/20/core/engines.html
https://towardsdatascience.com/sqlalchemy-python-tutorial-79a577141a91
https://ithelp.ithome.com.tw/articles/10220446
# python regular
https://chwang12341.medium.com/%E7%B5%A6%E8%87%AA%E5%B7%B1%E7%9A%84python%E5%B0%8F%E7%AD%86%E8%A8%98-%E5%BC%B7%E5%A4%A7%E7%9A%84%E6%95%B8%E6%93%9A%E8%99%95%E7%90%86%E5%B7%A5%E5%85%B7-%E6%AD%A3%E5%89%87%E8%A1%A8%E9%81%94%E5%BC%8F-regular-expression-regex%E8%A9%B3%E7%B4%B0%E6%95%99%E5%AD%B8-a5d20341a0b2
ELK
1. https://ithelp.ithome.com.tw/users/20103420/ironman/1046
2. https://ithelp.ithome.com.tw/articles/10186351
3. https://ithelp.ithome.com.tw/articles/10186349
4. https://github.com/deviantony/docker-elk
5. security elk
https://ithelp.ithome.com.tw/articles/10216666
6. git
https://github.com/deviantony/docker-elk/blob/main/docker-compose.yml
7. file beat
https://www.elastic.co/guide/en/beats/filebeat/current/running-on-docker.html
https://hackmd.io/@QCZ_Kvv1ScixyAPzRYDKWQ/SytK_Y9HE?type=view
8. elk license
https://techexpert.tips/elasticsearch/elasticsearch-trial-license-installation/
9. video
https://www.youtube.com/watch?v=DVgKDPf7hOU&ab_channel=CodingExplained
10. filebeat nginx
https://www.bmc.com/blogs/elasticsearch-filebeat-nginx/
https://linyencheng.github.io/2020/09/02/elastic-logging-quick-start/
https://ithelp.ithome.com.tw/articles/10275576
network submask cal
https://damaha-labo.site/converter/zh-Hant/IT/CalcSubnetMask
https://www.iptp.net/zh_HK/iptp-tools/ip-calculator/
https://david50.pixnet.net/blog/post/45215556-%5B%E7%AD%86%E8%A8%98%5Dipv4-submask%E8%A8%88%E7%AE%97
http://webtest.ccivs.cyc.edu.tw/net/new1.htm
https://ithelp.ithome.com.tw/questions/10153316
pandas tutorial
https://pandas.pydata.org/docs/getting_started/intro_tutorials/06_calculate_statistics.html
# pandas read sql tutorial
https://mariadb.com/ko/resources/blog/reporting-with-pandas-and-seals-and-pythons-oh-my/
# pandas from records
https://pandas.pydata.org/docs/reference/api/pandas.DataFrame.from_records.html
# pands read sql
https://pandas.pydata.org/docs/reference/api/pandas.read_sql.html
https://www.geeksforgeeks.org/sqlalchemy-orm-conversion-to-pandas-dataframe/
# to pandas data
https://stackoverflow.com/questions/29525808/sqlalchemy-orm-conversion-to-pandas-dataframe
#
rabbitmq hearbear
https://www.rabbitmq.com/heartbeats.html
https://www.cnblogs.com/royfans/p/14169134.html
python mutithread and filelock
https://superfastpython.com/threadpool-python/
https://py-filelock.readthedocs.io/en/latest/index.html
https://bobbyhadz.com/blog/python-get-random-key-value-from-dictionary
Machine learning PCA
http://www.cs.otago.ac.nz/cosc453/student_tutorials/principal_components.pdf
https://chih-sheng-huang821.medium.com/%E6%A9%9F%E5%99%A8-%E7%B5%B1%E8%A8%88%E5%AD%B8%E7%BF%92-%E4%B8%BB%E6%88%90%E5%88%86%E5%88%86%E6%9E%90-principle-component-analysis-pca-58229cd26e71
Machine learning Decision tree
#
機器學習: Ensemble learning之Bagging、Boosting和AdaBoost
https://chih-sheng-huang821.medium.com/%E6%A9%9F%E5%99%A8%E5%AD%B8%E7%BF%92-ensemble-learning%E4%B9%8Bbagging-boosting%E5%92%8Cadaboost-af031229ebc3
#
SPAM Detection with Decision Trees
https://mef-bda503.github.io/pj-sevgilit/files/SPAM.html
#
Decision Trees Concepts with Iris Dataset
https://medium.com/intuitive-machine-learning/decision-trees-concepts-with-iris-dataset-304648b961f5
#XGBoost
https://slundberg.github.io/shap/notebooks/Census%20income%20classification%20with%20XGBoost.html
# Decision tree
https://ithelp.ithome.com.tw/articles/10271143
https://sites.google.com/view/zsgititit/home/ji-qi-xue-xi/%E6%B1%BA%E7%AD%96%E6%A8%B9decision-trees
http://debussy.im.nuu.edu.tw/sjchen/MachineLearning/final/CLS_DT.pdf
https://chtseng.wordpress.com/2017/02/10/%E6%B1%BA%E7%AD%96%E6%A8%B9-decision-trees/
https://buggyprogrammer.com/random-forest-based-features-selection/
機器學習_學習筆記系列(36)：隨機森林分類(Random Forest Classifier)
https://tomohiroliu22.medium.com/%E6%A9%9F%E5%99%A8%E5%AD%B8%E7%BF%92-%E5%AD%B8%E7%BF%92%E7%AD%86%E8%A8%98%E7%B3%BB%E5%88%97-36-%E9%9A%A8%E6%A9%9F%E6%A3%AE%E6%9E%97%E5%88%86%E9%A1%9E-random-forest-classifier-bd902dc107c5
https://tomohiroliu22.medium.com/%E6%A9%9F%E5%99%A8%E5%AD%B8%E7%BF%92-%E5%AD%B8%E7%BF%92%E7%AD%86%E8%A8%98%E7%B3%BB%E5%88%97-24-%E6%B1%BA%E7%AD%96%E6%A8%B9%E5%88%86%E9%A1%9E-decision-tree-classifier-f79eb277e7a1
https://medium.com/@gary1346aa/%E6%A9%9F%E6%A2%B0%E5%AD%B8%E7%BF%92-gradient-boosting-1-272e8d7b17e1
https://www.baeldung.com/cs/gradient-boosting-trees-vs-random-forests
# sci ket and online test
https://scikit-learn.org/stable/
https://onecompiler.com/python/3z7xujrzn
#
資料視覺化之 Decision tree (決策樹)範例與 Machine Learning (機器學習) 概念簡單教學(入門)
https://tree.rocks/decision-tree-graphviz-contour-with-pandas-gen-train-test-dataset-for-beginner-9137b7c8416a
# 深度學習
https://tomohiroliu22.medium.com/%E6%B7%B1%E5%BA%A6%E5%AD%B8%E7%BF%92paper%E7%B3%BB%E5%88%97-01-deep-learning-38dfd9b6a9dc
good author
https://tomohiroliu22.medium.com/
# 測試衡量
https://cynthiachuang.github.io/Common-Evaluation-MetricAccuracy-Precision-Recall-F1-ROCAUC-and-PRAUC/
#
機器學習Lesson 20— 為什麼「梯度提升」會叫「梯度」提升呢？
https://flag-editors.medium.com/%E6%A9%9F%E5%99%A8%E5%AD%B8%E7%BF%92lesson-20-%E7%82%BA%E4%BB%80%E9%BA%BC-%E6%A2%AF%E5%BA%A6%E6%8F%90%E5%8D%87-%E6%9C%83%E5%8F%AB-%E6%A2%AF%E5%BA%A6-%E6%8F%90%E5%8D%87%E5%91%A2-48a2d4585f44
# 學習文章
http://debussy.im.nuu.edu.tw/sjchen/ML_final.html
成為機器學習的王者系列 第 1 篇
https://ithelp.ithome.com.tw/articles/10216118
2023年4月14日 星期五
Packet tracer
1. download
https://www.netacad.com/portal/resources/packet-tracer
2. https://www.packettracernetwork.com/download/download-packet-tracer.html
2023年3月15日 星期三
2023年3月13日 星期一
2023年3月9日 星期四
2023年3月8日 星期三
2023年2月19日 星期日
TCP SYN FLOOD
https://www.alibabacloud.com/blog/tcp-syn-queue-and-accept-queue-overflow-explained_599203
2023年1月18日 星期三
Eightnight queeue problem
# Online Python compiler (interpreter) to run Python online.
# Write Python 3 code in this online editor and run it.
def isValid(board, row, col):
for i in range(row):
if board[i] == col or abs(board[i] - col) == abs(i - row):
return False
return True
def eightQueens(board, row):
print(f"borad: {board}, row: {row}")
if row == 8:
print("finally:")
print(board)
print("-"*20)
return
for i in range(8):
if isValid(board, row, i):
board[row] = i
eightQueens(board, row + 1)
eightQueens([-1] * 8, 0)
2023年1月12日 星期四
OneFS guideline
1. version release note
https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h18031-wp-powerscale-onefs-prior-release-contents.pdf.external
2. cve
https://cve.report/software/dell/emc_powerscale_onefs
3. cmd line
https://www.delltechnologies.com/asset/en-us/products/storage/technical-support/docu95371.pdf
4. network design
https://www.delltechnologies.com/asset/en-us/products/storage/industry-market/h16463-isilon-advanced-networking-fundamentals.pdf
2023年1月10日 星期二
junos
1. Fw filter
https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/concept/firewall-filter-stateless-guidelines-for-configuring.html
firewall { family family-name { filter filter-name { accounting-profile name; instance-shared; interface-specific; physical-interface-filter; term term-name { filter filter-name; } term term-name { from { match-conditions; ip-version ip-version { match-conditions; protocol (tcp | udp) { match conditions; } } } then { actions; } } } } }
2. From condition
https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/concept/firewall-filter-match-conditions-for-ipv4-traffic.html3. List keyword https://www.juniper.net/documentation/us/en/software/junos/routing-policy/topics/ref/statement/then-firewall-filter-ex-series.html
2023年1月3日 星期二
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