Software Engineer Notes (Ziv Birer blog)

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Linux Cheatsheet Users management History Network Permissions Redirection Network sniffer systemd text manipulation - awk and sed System info What How name of host hostname FQDN of host hostname -A IP address of host hostname -i memory usage free -h Linux flavor cat /etc/*-release cat /proc/version lsb_release -a disk usage df -h folders size du -ah total disk usage off the current directory du -sh History tool What How Run last command starting with abc !abc Print last command starting with abc !abc:p Last argument of previous command !$ Search history CONTROL-R All arguments of last command !* First argument of last command !^ Take second argument of last cp command ls -l !cp:2 Network netstat man page netstat examples View Only Established Connection netstat -natu | grep 'ESTABLISHED' -a = Show both listening and non-listening (for TCP this means established...

SystemD cheatsheet systemd is a system and service manager for Linux, compatible with SysV .  Overview of systemd for RHEL 7   Understanding and administering Systemd What Command service foobar start systemctl start foobar sservice foobar stop systemctl stop foobar service foobar status systemctl status foobar.service Listing dependencies: To see dependencies of a service systemctl list-dependencies nfs-server.service loaded services systemctl -t service installed services: systemctl list-unit-files -t service check for services in failed state systemctl --state failed

What How mark place in a ma goto a Start of line 0 End of line $ Copy current line yy Copy 5 lines 5yy Paste p P - before line Copy to a named buffer ayy  - name is a' Paste name buffer app Delete till a character X dfX

SystemD cheatsheet: systemd is a system and service manager for Linux, compatible with SysV.  Overview of systemd for RHEL 7  Understanding and administering Systemd What Command service foobar start systemctl start foobar sservice foobar stop systemctl stop foobar service foobar status systemctl status foobar.service Listing dependencies: To see dependencies of a service systemctl list-dependencies nfs-server.service

Short docker commands list (in table view): Images What How List local images docker images Delete local image docker rmi NAME Download image docker image pull NAME Create container from image (detached) docker run –d … Display information on image docker image inspect hpsoftware/almoctane Containers What How List of running docker containers docker ps List all docker containers (running and stopped) docker ps -a Start existing container docker start ID Stop contianer docker stop ID Create container, start it and get a shell inside of it docker run -it IMAGE bash Run a command inside of an already running container docker exec -it ID bash Delete container docker rm ID Get log docker logs ID Other What How Create virtual network docker create network octane_nw Start docker service systemctl start docker Define proxy mkdir -p /etc/systemd/system/docker.service.d vi /etc/systemd/system/docke...

RPM is the Linux deployment tool. But how to use it? What How Files in RPM package rpm -qpl XX.rpm List scripts rpm -qp --scripts XX.rpm Install rpm rpm -ivh XX.rpm Update rpm rpm -Uvh XX.rpm Installed packages rpm -qa Information on specific installation rpm -qi PACKAGE Uninstall package rpm -e XX sd