= Linux at Roche Luiza Kuźma :icons: font :toc: == New Installation * Copy ** your notes ** your pictures and folders ** bash history ** bookmarks!!! ** gvimrc ** snap list ** apt list == Dell XPS 13 === Others jetbrains@ -> 3x (keyring) keyring -> 3x (keyring) wallet4kde -> 3x -> kde 4x ==== GitLab https://docs.gitlab.com/ee/ssh/ * nie używaj hasła do certyfikatu bo będzie się Ciebie pytał po 3x przy każdym pushu.... ---- cd cd ./ssh ssh-keygen -t ed25519 -C "" ssh-keygen -t ed25519 -C "Dell_on_Gitlab" ---- === GNOME (ubuntu) 22 ==== Programming installations * Flyway 6.5.5 ** https://code.roche.com/pdil/snowflake/snowflake/-/package_files/167350/download[Roche repo for Flyway] ** sudo cp -r flyway /usr/local/bin/flyway_6_5_5 ** sudo ln -s /usr/local/bin/flyway_6_5_5/flyway /usr/local/bin/flyway ==== System Installations * apt update * apt upgrade * IntelliJ ** Toolbox: *** sudo tar -xzf jetbrains-toolbox-1.21.9712.tar.gz -C /opt * openJDK 11 ** sudo apt install default-jre ** sudo apt install default-jdk ** szukanie lokalizacji JDK *** /usr/lib/jvm/java-11-openjdk-amd64 *** sudo update-alternatives --config java *** Problem: IntelliJ nie bierze tego jdk - bierze z katalogu: default.... * Extensions - rozszerzenia gnome ** gnome-shell *** sudo apt gnome-shell ** gnome-shell-extension *** sudo apt install gnome-shell-extensions ** gnome-shell-extension-manager *** sudo apt install gnome-shell-extenstion-manager * pulpity ** sudo apt install gnome-tweaks ** pulpit dzielony na 4 -> extension do "gnome-tweaks" *** sudo apt install gnome-shell-extensions * Now you will need to restart the Gnome shell. ** Hit Alt+F2 keyboard shortcut and then type r and hit Enter to do so. * Changing brightness in screen: XPS 9300 Ubuntu & Adaptive Brightness changing all the time ** I have a XPS 13 9300 shipped with Ubuntu 18.04 by Dell. The adaptive brightness can be disabled from: *** Settings => Power => Automatic brightness * Michał Kalinowski Terminal: guake https://overflow.roche.com/t/i-cannot-connect-to-wifi-on-my-dell-xps-9310-what-should-i-do/6739 === GNOME (ubuntu) 20 - Problems on Dell * WiFi + blutooth ** https://overflow.roche.com/t/i-cannot-connect-to-wifi-on-my-dell-xps-9310-what-should-i-do/6739/7 *** git clone git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git *** sudo cp -r linux-firmware/ath11k /lib/firmware/ ===== External Display is not visible * gnome does not see external display * trying to fix it ** sudo apt-get install kubuntu-desktop ** it didn't help *** on my home computer I have KDE as a windows and external screen works with HP computer (also Ubuntu 20th) * idea to check ** in the office with the external screen ===== No visible Blutooth * at least in gnome ** and little ports to use Default RLC at GNOME (ubuntu) working with ==== Multiple workspaces with many monitors sudo apt install gnome-tweaks * przełączanie ** Super + Pg Up / Pg Down ** OR ** Ctrl + Alt + Arrow Up / Arrow Down * przenoszenie okna między workspace'ami ** Super + Schift + Page Up/Down * podzał ekranu na 4 - opcje: winTile, gTile, ShellTile, ** WinTile *** Super + strzałka (to przy podziale na 4 -> jak pod Windows) *** icon:minus[] nie działa dla Ubuntu 22 ** ShellTile *** icon:minus[] nie działa dla Ubuntu 22 ** Ubuntu 22 *** Tiling Assistant (GitHub) **** https://askubuntu.com/questions/1460962/view-split-on-top-bottom-in-ubuntu-22-04[Instruction] *** Quater Windows *** Tactile **** https://fostips.com/two-more-apps-side-by-side-ubuntu-22-04/[] ==== Quater Windows https://github.com/troyready/quarterwindows[Shortcuts] Overview This extension adds shortcuts for window management. Shortcuts Move window to upper right ("northeast") corner: Ctrl + Win + i Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/put-to-corner-ne "['i']" Move window to upper left ("northwest") corner: Ctrl + Win + u Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/put-to-corner-nw "['u']" Move window to lower right ("southeast") corner: Ctrl + Win + k Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/put-to-corner-se "['k']" Move window to lower left ("southwest") corner: Ctrl + Win + j Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/put-to-corner-sw "['j']" Move window to upper half: Ctrl + Win + UpArrow Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/put-to-half-n "['Up']" Move window to bottom half: Ctrl + Win + DownArrow Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/put-to-half-s "['Down']" Move window to right half: Ctrl + Win + RightArrow Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/put-to-half-e "['Right']" Move window to left half: Ctrl + Win + LeftArrow Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/put-to-half-w "['Left']" Move window focus to the left ("west"): Shift + Win + h Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/move-focus-w "['h']" Move window focus down ("south"): Shift + Win + j Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/move-focus-s "['j']" Move window focus up ("north"): Shift + Win + k Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/move-focus-n "['k']" Move window focus to the right ("east"): Shift + Win + l Can be customized via: dconf write /org/gnome/shell/extensions/com-troyready-quarterwindows/move-focus-w "['l']" Determining Shortcut Keys An easy way to determine custom shortcut key values is to: Watch for dconf changes by opening a terminal and running dconf watch / Set a temporary custom GNOME shortcut (Settings -> Keyboard -> View and Customize Shortcuts -> Custom Shortcuts) The dconf command will display the chosen shortcut keys. Delete the shortcut and use the displayed shortcut in the above customization commands. ==== gnome-shell * gnome-shell --version * install extension manually from zip ** e.g. wintile *** przykład na innym extension: **** https://linuxconfig.org/install-gnome-shell-extensions-from-zip-file-using-command-line-on-ubuntu-20-04-linux *** unzip -C wintilenowsci.com.v7.shell-extension.zip metadata.json | grep uuid | cut -d \" -f4 wintile@nowsci.com *** mkdir -p ~/.local/share/gnome-shell/extensions/wintile@nowsci.com *** unzip -q wintilenowsci.com.v7.shell-extension.zip -d ~/.local/share/gnome-shell/extensions/wintile@nowsci.com *** gnome-extensions enable wintile@nowsci.com *** In order for the changes to take effect, you’ll need to restart the GNOME shell. The quickest way of doing so is: **** to press Alt+F2 on your keyboard, type r, and then press enter. ===== Paint pod Gnome * pod gnome za maleńkie ikonki (i nie dało się tego poprawić) ** Pinta ** xpaint ** KolourPaint * pod gnome działały (ikony do rozczytania) ale trudne i skomplikowane programy: ** Krita ** MyPaint * rozwiązanie ** kUbuntu Plasma <=> KDE - KolourPaint ma normalne ikony === KDE - Ubuntu 20 * nie działał ekran startowy - doinstalowywałam * języki - tutaj uwaga: ** System Settings -> Regional Settings *** Language - MUSI zostać angielski inaczej CAŁY SYSTEM linux będzie po polsku *** Formats **** Region: Polska - ustawienia w KDE i komunikaty systemowe są po polsku **** Region: MUSI zostać angielski inaczej CAŁY SYSTEM linux będzie po polsku **** Detailded Settings: Jednakże ustawienia szczegółowe można przestawić na "Polska", nie wpływają na język systemu ***** Numbers, Time, Currency, Measurement Units, Collation and Sorting * wylogowywanie przez Ctrl+Alt+Del ** Global Shortcuts * dodanie sztywnych wirtualnych desktopów ** System Settings -> Virtual Desktops (moża podpisać i uzgodnić ułożenie - czy rząd czy tablica) * gVim - doinstalowałam ** etc/vim/gvimrc *** colorscheme desert *** colorscheme slate *** colorscheme torte ** these settings seems to be not necessary under Linux *** set langmenu=en_US *** set nocompatible *** set nu *** set guifont=Monospace:h13 * Zegar na pasku ** Event Calendar widget - skonfigurowany pode mnie ** wygląda dobrze tylko jeśli taskbar jest u dołu * Restore previous session - jest domyślny w KDE * System Settings -> Screen Edges ** aka hot corners ** podłączanie różnych przydatnych zachowań pod "gorące punkty" ** można też dodać dzielenie ekranu na 4 ale to działa nie dla "ekranu" ale dla całego workspace * podział ekranu na 4 w rogach ** Global Shortcuts -> kWin użycie i podpięcie pod akcje skrótów (te się sprawdzają i są intuicyjne - z Windows???) *** Quick Tile Window to the Bottom Left : Meta+Ctrl+Left *** Quick Tile Window to the Bottom Right : Meta+Ctrl+Down *** Quick Tile Window to the Top Left : Meta+Ctrl+Up *** Quick Tile Window to the Top Right : Meta+Ctrl+Right * inny sposób prezentacji menu ** oryginalnie jest: Application Launcher ** doinstaluj Widget: Applicatin Dashboard przypięty do taskbara *** Application Dashboard <=> A fullscreen application launcher * Mouse Whell - Scroll desktop (on desktop) ** you can redefine or remove this action in *** Right click on desktop -> Configure Desktop -> Mouse Actions -> Vertical-Scroll -> minus button on the right * Przemieszczanie okien między desktopami ** System Settings -> Workspace Behavior -> Screen Edges -> Switch desktop on edge: Only When Moving Windows === Java Developer ==== Błędy w IntelliJ z opisem * po zainstalowaniu java + mvn przez sudo apt ** openJDK 11 *** sudo apt install default-jre *** sudo apt install default-jdk *** szukanie lokalizacji JDK **** /usr/lib/jvm/java-11-openjdk-amd64 **** sudo update-alternatives --config java ***** możesz wybrać interakcyjnie wersję javy **** Problem: IntelliJ nie bierze tego jdk - bierze z katalogu: default.... Czerwone w konsoli ---- /usr/lib/jvm/default-java/bin/java -Dmaven.multiModuleProjectDirectory=/home/users/kuzmal/IdeaProjects/roche-oauth2-spring -Dmaven.home=/usr/share/maven -Dclassworlds.conf=/usr/share/maven/bin/m2.conf -Dmaven.ext.class.path=/home/users/kuzmal/.local/share/JetBrains/Toolbox/apps/IDEA-U/ch-0/212.5457.46/plugins/maven/lib/maven-event-listener.jar -javaagent:/home/users/kuzmal/.local/share/JetBrains/Toolbox/apps/IDEA-U/ch-0/212.5457.46/lib/idea_rt.jar=46707:/home/users/kuzmal/.local/share/JetBrains/Toolbox/apps/IDEA-U/ch-0/212.5457.46/bin -Dfile.encoding=UTF-8 -classpath /usr/share/maven/boot/plexus-classworlds-2.x.jar org.codehaus.classworlds.Launcher -Didea.version=2021.2.3 clean WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.google.inject.internal.cglib.core.$ReflectUtils$1 (file:/usr/share/maven/lib/guice.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain) WARNING: Please consider reporting this to the maintainers of com.google.inject.internal.cglib.core.$ReflectUtils$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release ---- https://github.com/google/guice/issues/1216 @alan-hwp are you using Ubuntu's custom distribution of Maven? The official Maven distribution uses the "no-AOP" build of Guice which doesn't contain any CGLIB code. If you download an official distribution from https://maven.apache.org/ then you shouldn't see the warning. ==== Reinstalacja mavena * Skonfiguruj java ** https://help.ubuntu.com/community/EnvironmentVariables *** /etc/profile.d -> java-maven.sh **** export JAVA_HOME=/usr/lib/jvm/default-java **** export PATH=$PATH:$JAVA_HOME/bin * Skonfiguruj maven ** https://maven.apache.org/install.html ** https://www.rosehosting.com/blog/how-to-install-apache-maven-on-ubuntu-20-04/ ** ja umieściłam maven tam gdzie java: /usr/lib/jvm *** i dodałam do /etc/profile.d -> java-maven.sh **** export M2_HOME=/usr/lib/jvm/apache-maven-3.8.4 **** export MAVEN_HOME=/usr/lib/jvm/apache-maven-3.8.4 **** export PATH=$PATH:$JAVA_HOME/bin:$M2_HOME/bin Ostatecznie plik java-maven.sh wygląda ---- export JAVA_HOME=/usr/lib/jvm/default-java export M2_HOME=/usr/lib/jvm/apache-maven-3.8.4 export MAVEN_HOME=/usr/lib/jvm/apache-maven-3.8.4 export PATH=$PATH:$JAVA_HOME/bin:$M2_HOME/bin ---- * sudo chmod +x java-maven.sh * wykonaj ten plik przez: ** source java-maven.sh == Roche Linux RLC configuration === Pulse Secure Snowflake problem https://overflow.roche.com/t/unable-to-connect-to-snowflake-due-to-blocked-ip/7501/8[Roverflow: Unable to connect to Snowflake due to blocked IP] Manual adding any domain you want to tunneling using script delivered by @kravvcu . In my case it was domain suitable for SnowFlake. Download the script from this link 1 or directly from @kravvcu post. (it is located in our Roche GitLab) ==== Preparations - one time preparations * location ** ./Projects/PDIL/routes_lk ** ./Projects/PDIL/routes_oryg * Edit script and add your domain. In my case it was changing DOMAINS variable from: DOMAINS=( domain.one.roche.com domain.two.roche.com ) to: DOMAINS=( roche_pd.eu-central-1.snowflakecomputing.com ) * Add executable to the file routes (chmod u+x) ==== VPN connection with SF * Connect to your VPN gateway, whichever you want * Run the script ./Projects/PDIL/routes_lk * It will produce two commands, which you execute on your own. ** In my case it was such commands (the ip address depends on gate, to which you are connected to): ---- sudo ip route add 3.65.82.225 via 10.143.136.153 dev tun0 metric 1; sudo ip route add 3.120.160.121 via 10.143.136.153 dev tun0 metric 1; ---- * enjoy connection to SnowFlake… === Pulse Secure hanging problems ==== Skorzystałam z takich poleceń od Zbyszka: sudo systemctl restart pulsesecure.service sudo systemctl restart NetworkManager ==== Zbigniew Grzybek, 7 min ja uzywam takich komend jak mi sie pulse wykrzaczy ---- sudo cp /etc/resolv.conf_back /etc/resolv.conf sudo systemctl restart pulsesecure.service sudo systemctl restart NetworkManager ---- i pozniej do laczenia: ---- /opt/pulsesecure/bin/pulselauncher -U rbapulse.range.roche.net/rlcaas-cert -r EMEA -c /home/users/grzybekz/.pulsesecure/pulse/certificates/grzybekz.pem -u grzybekz w /etc/resolv.conf_back mam taki wpis (ale tutaj mozesz miec inny): # Generated by NetworkManager search localdomain nameserver 192.168.86.2 ---- === FollowMe Printer https://overflow.roche.com/t/how-to-install-followme-printer/446/14[Roverflow How to install FOLLOWME printer?] lpadmin -p FollowMe_Warsaw -E -v lpd://rwamsmps.emea.roche.com/Warsaw_FollowMe -m foomatic-db-compressed-ppds:0/ppd/foomatic-ppd/Xerox-WorkCentre_7345-pxlcolor.ppd && lpadmin -p FollowMe_Poznan -o PageSize=A4 -o printer-is-shared=false creates=/etc/cups/ppd/FollowMe_Warsaw.ppd ==== Add person to the group lpadmin ===== It works! https://askubuntu.com/questions/964040/usermod-says-account-doesnt-exist-but-adduser-says-it-does[Overflow description] ---- Just do this: sudo vim /etc/group and add your name to the desired group, like: somegroup:x:25:yourusername ---- However, the commands: groups id do not return lpadmin group but I am able to play with the printer. ===== It DOESN'T WORK [source,shell] ---- sudo usermod -a -G group1,group2 username ---- I am getting the message: ---- kuzmal@rwauwprlc0049:/etc$ sudo usermod -a -G lpadmin kuzmal usermod: user 'kuzmal' does not exist ---- ==== Add printer driver * trying with ppd ** https://frameboxxindore.com/linux/quick-answer-how-install-ppd-file-in-ubuntu.html[Quick Answer: How install PPD file in Ubuntu?] https://www.support.xerox.com/en-us/product/workcentre-7328-7335-7345-7346/downloads?platform=linux&language=en[Xerox WorkCentre 7345 Foomatic/pxlcolor] === Change Password https://roche.service-now.com/rose?id=ticket&table=incident&sys_id=21e728131b6991947a7d99baab4bcb28[RoSE ticket] ==== Roverflow * Planowane pytanie do Roverflow ** https://overflow.roche.com/t/how-does-one-change-the-password-on-rlc/9803/14 ** 2023-02-23 Hi @Mihajlo_Joksimovic, I have similar issue (probably) as @Daniel_Sabanes_Bove: * I changed my password in CIDM, * I was many times in the office working after this change * I changed the disc encription password but... my Ubuntu 20 still wants my previous domain password to log-in and all admin/sudo actions require previous domain password. I had some tickets done in SNOW but it hasn't change * cidm ** it does not change password in Linux *** for disc encription, use this cmd: **** sudo /usr/sbin/rlcaas-roche-luks-key-changer *** for system (login + sudo) **** login into RCN inside the Roche Infrastructure (Roche Network in the office) **** try restarting the centrifydc service: ***** “sudo systemctl restart centrifydc.service” --> Roverflow ***** "systemctl restart centrifydc" --> RoSE ticket ***** Then the cache should actually be deleted and recreated with the new use. *** check the Centrify status with command "adinfo" ---- kuzmal@rwauwprlc0049:~$ adinfo Local host name: rwauwprlc0049 Joined to domain: emea.roche.com Joined as: rwauwprlc0049.emea.roche.com Pre-win2K name: rwauwprlc0049 Current DC: Preferred site: ADS-CH-BaselKaiseraugst Zone: emea.roche.com/Zones/EMEA_RLC-Clients-Global CentrifyDC mode: disconnected Licensed Features: Enabled ---- I am in the office today and try to finalize the issue. I did: adinfo and got "disconnected". Then I did: sudo systemctl restart centrifydc.service and afterwards: adinfo and... I still have "disconnected". ---- kuzmal@rwauwprlc0049:~$ ip a 1: lo: mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: wlp114s0: mtu 1500 qdisc mq state UP group default qlen 4096 link/ether 9c:b6:d0:3f:67:80 brd ff:ff:ff:ff:ff:ff inet 10.144.57.216/23 brd 10.144.57.255 scope global dynamic noprefixroute wlp114s0 valid_lft 592132sec preferred_lft 592132sec inet6 fe80::9eb6:d0ff:fe3f:6780/64 scope link noprefixroute valid_lft forever preferred_lft forever 3: enxd037454c1936: mtu 1500 qdisc fq_codel state DOWN group default qlen 1000 link/ether d0:37:45:4c:19:36 brd ff:ff:ff:ff:ff:ff 4: enx80ce6278ff02: mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 80:ce:62:78:ff:02 brd ff:ff:ff:ff:ff:ff inet 10.144.52.165/24 brd 10.144.52.255 scope global dynamic noprefixroute enx80ce6278ff02 valid_lft 595157sec preferred_lft 595157sec inet6 fe80::a602:9255:669f:de9d/64 scope link noprefixroute valid_lft forever preferred_lft forever kuzmal@rwauwprlc0049:~$ ---- == Problems === Unblocking screen-saver or hanging log-in console * it was displayed during the screen-saver collapsed * "The screen locker is broken and unlocking is not possible anymore. In order to unlock" ** switch to a virtual terminal (e.g. Ctrl+Alt+F2) ** log in ** execute the command: *** loginctl unlock-session 3 ** switch back to the running session *** Ctrl+Alt+F1 == Tools === Screen recorders * simplescreenrecorder - czerwone rogi a w środku czerwona kropka ** nie łapie dźwięku z youtube - przypuszczam, że i ze spotkania * vokoscreenNG ** albo rwie dźwięk ** albo ekran nieruchomo ** trudno wymusić mikrofon === Installers * gem ** asciidoctor-diagram ** asciidoctor-pdf * apt * snap === Ciekawe - do rozważenia * Zajętość dysku, rozmiary katalogów, wieloplatformowe, wizualne obrazowanie ** https://www.linuxlinks.com/k4dirstat/[K4DirStat] === Paint alternatives * do sprawdzenia ** mtpaint ** Pinta ** xpaint ** KolourPaint *** taki sobi * trudne programy (działały też pod gnome - ikony do rozczytania): ** Krita ** MyPaint ** ale oba nie biorą prosto ze schowka === Doublecmd sudo apt-get install doublecmd-gtk === ImageMagic - ubuntu picture conversions * Carefully!!! - resize with keep aspect ratio - icon:exclamation-triangle[] but it substitute pictures ** do it on YOUR COPIES of pictures ** it does for ALL picture in the directory # 4k mogrify -resize '1920x1080^' *.JPG # FullHD mogrify -resize '1920x1080^' *.JPG === Profiles ==== Create env variables ---- # Global env variables /etc/profile /etc/profile.d -> put your own file # Local env variables /home/.../.profile -> or .bash_profile or .bash_login ---- https://www.baeldung.com/linux/environment-variables[Env variables] With Bash, we declare global variables in /etc/profile. But, we recommend declaring them in their own script files and putting those in /etc/profile.d. Bash will automatically pick these up. Global variables affect all users in the system. Each user can create a set of “global” environment variables for their own by creating ~/.profile in their home directory. ==== Load profile source .profile == Commands === Counting string appearance ==== json * directly in Postman * vi counts only till 99 (so e.g. 7844 will not display, sth like this: >99) * use with wc, wc -l -> counts number of lines ---- # counting the number of attributes on the given level jq '.item | length' 2023_05_12_Substance_PROD_Active_and_Deleted.json jq '.item[].hubStateInd' 2023_05_12_Substance_PROD_Active_and_Deleted_and_Pending.json | wc -l ---- ---- grep -o -i hubStateInd\"\:1 2023_05_12_Substance_PROD_Active_and_Deleted_and_Pending.json | wc -l ---- * jq is more about structure of json ---- jq '.item[] | .hubStateInd' '2023_05_12_Substance_PROD_Active_and_Deleted_and_Pending.json' | wc -l jq '.item[].hubStateInd' 2023_05_12_Substance_PROD_Active_and_Deleted_and_Pending.json | wc -l ---- * jq select element with hubStateInd=-1 ---- jq '.item[] | select (.hubStateInd==-1)' 2023_05_12_Substance_PROD_Active_and_Deleted_and_Pending.json ---- * count all elements, which have on the 1st level of a table hubStateInd=1 or -1 (to avoid counting children) ---- jq '.item[] | select (.hubStateInd==-1)' 2023_05_12_Substance_PROD_Active_and_Deleted_and_Pending.json | jq '.hubStateInd' | wc -l 212 jq '.item[] | select (.hubStateInd==1)' 2023_05_12_Substance_PROD_Active_and_Deleted_and_Pending.json | jq '.hubStateInd' | wc -l 7787 ---- * https://stedolan.github.io/jq/[jq documentation] * https://gist.github.com/barbietunnie/e694d8a8b3f5fd895829e44e7b2c42eb[jq Tips] === Useful commands * whereis * Environment variables ** printenv * port in use ** sudo lsof -i:22 ** sudo lsof -i:8443 ** https://www.cyberciti.biz/faq/unix-linux-check-if-port-is-in-use-command/ === Find / Grep ==== Sum-up of useful find: [source,shell] ---- find . -type f -name *Mongo* find / -name rlcaas-roche-luks-key-changer 2>/dev/null find ./ -type f -name *.adoc -exec grep --include=\*.adoc -ilnw "Applause" {} \; ---- ==== Description of problems https://stackoverflow.com/questions/22552538/grep-warning-recursive-directory-loop[Problem and solution description] grep --include=\*.adoc -irnw "devcopse" / [source,log] ---- grep: warning: ./svn/pages/india/xhtml/abcd/dvorak/testing/ocean/monday: recursive directory loop ---- You have to exclude symbolic links from your grep, they are reason of this warning. You should try to use find firstly: find ./ -type f -exec grep -il "blah_blah_text" {} \; When you use find firstly you can omit -r in grep, because find is already recursive. find ./ -type f -exec grep --include=\*.adoc -ilnw "security" {} \; === Grep * https://stackoverflow.com/questions/16956810/how-do-i-find-all-files-containing-specific-text-on-linux[grep] ** redirect warnings/errors to null: *** 2>/dev/null [source,shell] ---- grep --include=\*.adoc -irnw "devcopse" /home/users/kuzmal fgrep --include=\*.adoc -irnw "security" /home/users/kuzmal # with 2>/dev/null grep --include=\*.adoc -irnw "devcopse" /home/users/kuzmal 2>/dev/null fgrep --include=\*.adoc -irnw "security" /home/users/kuzmal 2>/dev/null ---- === History * history * history | grep env * !760 - execute command no 760 * history -d - remove command from history (e.g. sensitive data) === Info about user / profile /system [source,bash] ---- cat << EOF * Username: "${USER}" * Hostname: "${HOST}" * Site: $(grep 'site=' /etc/rlc-systeminfo | cut -d ' ' -f2) * OS Version: (`cat /etc/os-release`) * Kernel Version: (`uname -a`) EOF ---- === Od Tomasza Marciniaka ==== Ctrl+C, Ctrl+V stty -a stty intr ^J ==== Pictures - exiftool exiftool img1.jpg exiftool -all= img1.jpg ==== Pictures - ImageMagick convert -resize 25% img1.jpg img2.jpg identify -verbose m.jpg ==== Video ffmpeg -i infile -vf "scale=iw/2:ih/2" outfile ffmpeg -i infile -vf "scale=iw/2:ih/2" -b:v 150k outfile ffmpeg -i infile -vf "scale=iw/4:ih/4" -b:v 140k -b:a 64k outfile ==== Memory free -g / free -m top -o %MEM top -> f -> up/down -> s -> q (sort by something) top -> e/E (units) ==== X xdg-open https://github.com xsel ==== pdf pdfunite *.pdf 2018.pdf ==== TTS - festival apt install festival festvox-en1 festvox-us1 festvox-us2 festvox-us3 festvox-us-slt-hts festvox-kdlpc16k echo "Hello world" | festival --tts echo '(SayText "Hello World")' | festival --pipe festival --tts my-text.txt stty intr ^C (go back to default ctrl+c handling, without this festival doesn't work properly) festival help (voice.list) (tts "text.txt" nil) (voice_en1_mbrola) (voice_cmu_us_slt_arctic_hts) ==== TTS - espeak-ng apt install espeak-ng espeak-ng --voices=en espeak-ng -s 150 -f text.txt espeak-ng -s 140 -f text.txt -v us-mbrola-1 espeak-ng "Hello world" echo "Hello world" | espeak-ng ==== TTS - pico apt install libttspico-utils pico2wave -w a.wav "Hello world" aplay a.wav cat text.txt | pico2wave -w a.wav aplay a.wav === Linux servers sudo /home/adm/bin/suroot ==== ssh * .ssh ** cat/more id_rsa.pub ---- ssh xx@server ---- == Kubernetes === virtualbox-7.0 * Configuring Secure Boot ** 4Secure2Boot!