Skriptimine 2017

Linuxi käsud

Käsk	Funktsioon	Man link	Näidis
cd	Change Directory	http://www.skrenta.com/rt/man/cd.1.html	cd /var/log
ls	list directory contents	http://www.skrenta.com/rt/man/ls.1.html	ls -lah /var/log
ps	report process status	http://www.skrenta.com/rt/man/ps.1.html	ps -ef
grep	print lines matching a pattern	http://www.skrenta.com/rt/man/grep.1.html	grep -R 'error' /var/log/*
tail	output the last parts of file	http://www.skrenta.com/rt/man/tail.1.html	tail -f /var/log/syslog
cat	concatenate files and print on the standard output	http://www.skrenta.com/rt/man/cat.1.html	cat /var/log/syslog
man	format and display the on-line manual pages	http://www.skrenta.com/rt/man/man.1.html	man man
su	run a shell with substitute user and group IDs	http://www.skrenta.com/rt/man/su.1.html	su - root
cp	copy files and directories	http://www.skrenta.com/rt/man/cp.1.html	cp /var/log/syslog /tmp/tmp_syslog
mv	move (rename) files/directories	http://www.skrenta.com/rt/man/mv.1.html	mv /var/log/syslog.5 /arhiiv
rm	remove files or directories	http://www.skrenta.com/rt/man/rm.1.html	rm /tmp/tmp_syslog
sed	Stream editor	http://www.skrenta.com/rt/man/sed.1.html	sed -ie 's/mida/millega/g' /tmp/tmp_syslog
mkdir	make directories	http://www.skrenta.com/rt/man/mkdir.1.html	mkdir /tmp/skript
chmod	change file access premissions	http://www.skrenta.com/rt/man/chmod.1.html	chmod 700 /tmp/skript/myscript.sh
chown	change file owner or group	http://www.skrenta.com/rt/man/chown.1.html	chown student:student /tmp/skript/myscript.sh
chgrp	Change group ownership	http://www.skrenta.com/rt/man/chgrp.1.html	chgrp root /tmp/skript/myscript.sh
whoami	print effective userID	http://www.skrenta.com/rt/man/whoami.1.html	whoami
pwd	print name of current/working directory	http://www.skrenta.com/rt/man/pwd.1.html	pwd
awk	pattern scanning and processing language	http://www.skrenta.com/rt/man/awk.1.html	Echo one two | awk ‘{print $1}’
find	search for files in a directory hierarchy	http://www.skrenta.com/rt/man/find.1.html	find / -name passwd
cut	remove sections from each line of files	http://www.skrenta.com/rt/man/cut.1.html	http://www.thegeekstuff.com/2013/06/cut-command-examples
sort	sort lines of text files	http://www.skrenta.com/rt/man/sort.1.html	ls -la /var/log | sort -k5 -n
bc	An arbitrary precision calculator language	http://www.skrenta.com/rt/man/bc.1.html	echo 5+5 | bc

Bash-i info

Bash skripti alustamine

Looge fail laiendiga .sh ning avage see oma lemmik editoriga (näiteks vi)
Esimesena määrame millega skripti käivitatakse ehk:
#!/bin/bash

skripti muutmine selliseks, et seda saaks käivitada 
chmod +x skriptinimi.sh

If lause moodustamine

if [ Funktsioon ] then
tee midagi
fi
http://tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html
https://bash.cyberciti.biz/guide/If..else..fi

Debug mode

bash -x /skripti/path.sh

Exit koodid

Viimase käivitatud käsu exit koodi leiate muutujast $?
Juhul kui käsk õnnestus on exitkood 0
Juhul kui käsu käivitamisel tekkis tõrke on exit kood 0'ist erinev

Sisendi lugemine

read muutujanimi
read -p "tekst" muutujanimi

Tsüklid

https://www.cyberciti.biz/faq/bash-for-loop/
https://www.cyberciti.biz/faq/bash-while-loop/
https://bash.cyberciti.biz/guide/The_case_statement

Protsessi skeemid

Siit piisab kui kasutate esimest nelja elementi ehk Flowline, Terminal, Process ja Decision
https://en.wikipedia.org/wiki/Flowchart