SciTech

curl cheat.sh/find | curl https://cheat.sh/find | bash alias: function ct { curl cheat.sh\/"$1"; } | on github | Cheat sheets: muo Vim | vim | tldr simpler man pages | find | awk | awk quickref | htg awk | sed | sed, htg | 13 CLI cmds | dig | netstat cmds | html | ls -Al | tr -s ' ' | cut -f9- -d' ' (list just file and folder names; -R for dir recursion) comm -12 <(sort file1.txt) <(sort file2.txt) find common lines in two files cat papers_to_read.htm | sort | cut -c 1-50 | uniq -d (find duplicate lines) gpg --output outfile.gpg --symmetric --cipher-algo AES256 file.ext | gpg -o original_file.txt -d file.txt.gpg | history -c chmod --reference=reference_file file | chown --reference=reference_file file | sudo systemctl -a | sudo systemctl --state active | sudo cp -p pedit.html blogview.html cp -rp doc | sudo chmod/chown --reference=f f1 [f2 f3] | grep -Eri '(Redirect|RewriteRule)' /etc/apache2/ host ipaddr|domain (Cloud Shell: get ip addr for domain or domain for ip addr, etc) find /tmp -type f -name ".htaccess" -exec grep -EHi '(Redirect|RewriteRule)' {} \; find . -maxdepth 1 -type f -name "*.md" -exec ls -al {} \; | whatis | free | find . -type f -perm 777 -exec chmod 644 {} \; | sudo apache2ctl -M (show all loaded modules) sudo apache2ctl -D DUMP_RUN_CFG | sudo apache2ctl -D DUMP_VHOSTS sudo apache2ctl -S (show parsed VHost settings) | sudo apachectl -t (apache config test) journalctl -u ssh.service | journalctl -u network.service | journalctl article | faillog netstat -tulpn | netstat -npl tar -cvzf archive-name.tar.gz directory-name | tar -C /diff-folder -xvf yourfile.tar to extract to a different directory | curl http://ipv4.icanhazip.com or curl http://icanhazip.com` or curl http://ip.fossdaily.xyz | curl --ssl | curl --insecure | curl -I http://domain.com (headers info) | wget --no-check-certificate zgrep -E "^(Remove:|Purge)" /var/log/apt/history.log* sudo iptables -L -nv --line-numbers | sudo iptables-restore < /etc/iptables/rules.v4 | lastlog | last install pkgs “kept back”: sudo apt-get dist-upgrade | sudo apt-get --with-new-pkgs upgrade | apt list --installed | grep " installed" /var/log/dpkg.log (also log.1) | apt show <pkg> | sudo -u www-data php occ app:list sudo systemctl list-unit-files | sudo systemctl list-unit-files | grep -i docker | sudo systemctl | grep running (list running services) sudo systemctl list-unit-files | grep enabled (list enabled services) apt-cache search php7.3 dpkg-query -L <package name> (list files in package) zip -d gallery.zip "picture_43_9.jpg" (delete file from zip, note zip goes first, followed by file)

netstat -plane | grep :80 | awk '{print $5}' | grep -Eo '([0-9]{1,3}\.){3}[0-9]{1,3}'| sort | uniq -c | sort -n conn port 80 perl -pi -e 's,RoseHosting,BestManagedVPS' file.php Replace all string instances w/o opening file w text editor find /home -type d -perm -o+w -exec ls -ld {} \; find world-writable directories in /home sed -e "s/\r//g" file > newfile remove newline chars from file
sed -i 's/search/repace/g' *.php replace string in all specified files
sudo sshd -T | sudo systemctl reload ssh.service | /etc/ssh/sshd_config | ssh security hardening | sudo lshw df -h | df -T systemctl list-unit-files --type=service systemctl list-dependencies graphical.target apt list --installed apt purge <unneeded package> sudo apt autoremove | sudo apt autoclean id <username> timedatectl | Bash date to/from unix epoch time: date +%s | date -d @<unix epoch time> | hostnamectl status lsb_release -a | cat /proc/version | gcloud info | gcloud version | Windows: netstat | findstr ESTABLISHED

Replace string recursively with find and sed Remove all dpkg rc residual packages

delete every line until PATTERN, that line included: cat index.html | sed '1,/body onload/d' print (p) from the first line matching PATTERN to the end ($): cat index.html | sed -n '/body onload/,$p'

Which Linux distro is running: cat /etc/*-release

text processing in the shell

dpkg queries:

-l, --list package-name-pattern...
    List packages matching given pattern.
-s, --status package-name...
    Report status of specified package.
-L, --listfiles package-name...
    List files installed to your system from package-name.
-S, --search filename-search-pattern...
    Search for a filename from installed packages.
-p, --print-avail package-name...
    On debian/ubuntu, use instead: apt-cache show package-name
    Display details about package-name, as found in /var/lib/dpkg/available. 

ScraPy | Use ScraPy to Build a Basic Web Crawler to Pull Information From a Website |

What to do with 2nd Oracle free tier Compute Instance? nginx?

Apache Guacamole Apache Guacamole is a clientless remote desktop gateway. It supports standard protocols like VNC, RDP, and SSH. We call it clientless because no plugins or client software are required. Thanks to HTML5, once Guacamole is installed on a server, all you need to access your desktops is a web browser.

https://www.mapbox.com/

Add ubuntu to www-data group

markdown editor | stack editor | use pdlist with parsedown? |

Setup gce apache2 as reverse proxy to serve content from oci as backend server, or vice versa Examples: JCoyle | DO¹ | netnea | Apache proxy server in addition to web server

Install python3-pip on oci: apt search python3-pip

¹If Apache serves both HTTP/HTTPS, your reverse proxy configuration must be placed in both the HTTP and HTTPS virtual hosts. Examples cover reverse proxying both single and multiple backend servers. Also see the python flask possibilities in that article.

Try Hugo Learn theme on new blog SourceHut Setup Google Cloud Source Git Repositories

Look at all the reverse proxy ideas Reverse proxy for localhost security

Tried But Decided Against Learn Hugo and create test blog with K8spin Look into KubeSail free tier: KubeSail | Cloud hosting as easy as Heroku, as powerful as AWS Free, Automatic HTTPS for Every Application. A basic Ingress object which creates a web-accessible site using your free *.kubesail.io domain. You can now check your Certificates with kubectl get certificates! This cert will automatically be used and HTTPS should “just work”!