general review
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52295D2377F4D70F
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---
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title: "at"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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Install with:
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---
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title: "basics"
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tags: [ "Documentation", "basics" ]
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title: "Basics"
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tags: [ "Documentation", "Basics" ]
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---
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You need about a dozen commands to move around Linux.
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---
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title: "clock"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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Show system time:
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---
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title: "conditionals"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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# If statements
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---
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title: "cron"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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# Cron
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---
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title: "kernel"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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# Living Space
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## Living Space
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Kernel modules live in lib/modules/$(uname -r)
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## Change
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Load them with
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> sudo modprobe ath9k
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@ -16,5 +18,9 @@ Or remove one with
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The PC's irritating speaker beep can be really annoying. Disable it with:
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> sudo rmmod pcspeaker
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> sudo modprobe -r pcspeaker
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Permanently disable a module by blacklisting it in `/etc/modprobe.d`:
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> echo 'blacklist pcspkr' > /etc/modprobe.d/*nobeep*.conf
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---
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title: "kill"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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If you want to kill a program in a graphical environment, open a terminal and typeL
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## Graphical Programs
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If you want to kill a program in a graphical environment, open a terminal and type:
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# Graphical Programs
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> xkill
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Then click on the application which you want to kill.
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## All Programs
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# All Programs
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To kill a program, find it with:
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> kill 19643
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## Types of Kill
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# Types of Kill
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To see an ordered list of termination signals:
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---
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title: "links"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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Link from X to Y.
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> ln -s X ../otherdir/Y
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Links cause ownership headaches. Solve this with -h:
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If you want a hard link, this will make a single file exist in two locations.
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If it is deleted in one location, it continues to exist in the other.
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> chown -h user1 mysymlink
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> ln *X* *Y*
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Both files must be on the same hard drive, as they have the same inode (check this with `ls -i file`).
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---
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title: "locale"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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A list of supported locales is available at /usr/share/i18n/SUPPORTED
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---
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title: "locating"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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# Type
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`type` shows what kind of thing you're running, be it an alias, function, or binary program.
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> type cmus
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# Whereis the Program
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Ask where the `angband` program is, along with all its configuration files:
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> which cmus
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`type` shows what kind of thing you're running, be it an alias, or binary program.
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> type cmus
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# Quick Search for Files
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You'll need to set up `locate` for this by installing `mlocate`. `mlocate` needs a list of all files on the machine, so run:
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You'll need to set up `locate` for this by installing `mlocate`.
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`mlocate` needs a list of all files on the machine, so run:
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> sudo updatedb
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> locate cats
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For best results, run `updatedb` regularly, perhaps in crontab.
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---
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title: "packages"
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tags: [ "Documentation", "basics" ]
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---
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# Looking
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Your package has something to do with unzipping. Find out more:
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> apropos unzip
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# Maintenance
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> dpkg -l
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List what's installed.
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# Libraries
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Libraries under /lib/ typically contain an .so suffix when they're dynamic. It means 'shared object' as a number of programs will refer to it.
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Others will have an /a/ suffix, meaning that they're static, and will be loaded at runtime.
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We can check the dependencies of a program using the ldd command upon anything in a library. For example:
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> ldd/usr/bin/md5sum
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... shows us that md5sum depends upon:
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- linux-vdso.so.1
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- libc.so.6
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- lib64/ld-linux-x86-64.so.2
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To list all libraries, run:
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> ldconfig -p
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For example, if looking at /usr/lib/x86_64-linux-gnu/libXcomposite.so.1, we might wonder what it's for. We can then run:
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> ldconfig -p | grep libXcomposite
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... and find out nothing except that it redirects /usr/lib/x86...
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So at least we know where it is.
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> ldconfig -p | grep usb
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... this will show where things which nominally relate to usbs live.
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You can add to the libarary path by putting just any text file in /etc/ld.so.cache, e.g. in Arch where the path to the fakeroot environment is placed there.
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---
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title: "processes"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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# Free
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See free space with:
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> free
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and make it human readable with:
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> free -h
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Or `-m` for megabytes.
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# Proccesses
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See running items in current terminal with
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---
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title: "shell"
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tags: [ "Documentation", "basics" ]
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---
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Dash - fast but limited funcionality, great for scripts
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sh - a simple link to whatever your default shell is
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bash - the standard
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elvish - user-friendly, but new, with a full file-browser embedded into the system.
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# Login
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All shells launch either as login or non-login. All remote sessions without a GUI withl require authentication, and therefore will be login.
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## Login
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These shells start by reading /etc/profile then the first of ~/.bash_profile, ~/.bash_login or ~/.profile, and load all given values.
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## Non-Login
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Non-login shells will read /etc/bash.bashrc and then the ~/.bashrc file. You can summon the different shell perameters with the command `.`.
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For example, so summon the file ~/.bashrc, you can perform:
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`. ~/.bashrc`
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How the logout is handled depends upon ~/.bash_logout
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# Defaults
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The default shell config files to create for a new user are under /etc/skel.
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# Shellcheck
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Run `shellcheck script.sh` on your scripts to check them for mistakes.
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---
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title: "time"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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# systemd
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> timedatectl set-ntp true
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This info stays in /usr/share/zoneinfo
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This info stays in `/usr/share/zoneinfo`.
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# Local Time
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# Network Time Protocol
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Enter the shell with:
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Glimpse an overview with:
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> ntpq
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> ntpq -p
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Or just glimpse and overview with:
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> ntpq -q
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This clock can drift, which is then listed under /var/log/ntp.drift
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The config is under /etc/ntp.conf. If a line for the stats directory is listed, it'll log stats, e.g.:
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`statsdir /var/log/ntpstats/`
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This can show if clock drift occurs.
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The config file also lets you specify servers to obtain time from.
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Usually this is run as a service, so just start that service.
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---
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title: "users"
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tags: [ "Documentation", "basics" ]
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tags: [ "Documentation", "Basics" ]
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---
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# Basic Information
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> getent shadow
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will require sudo.
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## Examples
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> sudo adduser maestro
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---
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title: "email"
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tags: [ "Documentation", "chat" ]
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---
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# Sendmail
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Compose a message like this:
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```
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To: alice@domain.com
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Subject: my new mail server
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From: literally@anything.com
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This is the message
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```
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... and put it in ~/mail.txt.
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Then send with sendmail using:
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> sendmail ~/mail.txt
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---
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title: "irssi"
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tags: [ "Documentation", "chat" ]
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---
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In program:
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> /NETWORK LIST
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> /CHANNEL LIST
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> /connect chat.freenode.net
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> /set nick ghast
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> /join #hklbgd
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> /leave #lkj
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---
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title: "profanity"
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tags: [ "Documentation", "chat" ]
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tags: [ "Documentation", "Chat" ]
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---
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# Pre Setup
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---
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title: "signal"
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tags: [ "Documentation", "distros" ]
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tags: [ "Documentation", "Chat" ]
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---
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> yay -S signal-cli
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---
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title: "wgetpaste"
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tags: [ "Documentation", "chat" ]
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tags: [ "Documentation", "Chat" ]
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---
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See available pastebins:
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> wgetpaste -s dpaste -X
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