Standard Bash functions

Question 1

modify permissions

Answer 1

chmod

Question 2

add execution permission

Answer 2

chmod +x

Question 3

show username

Answer 3

whoami

Question 4

show ip configuration

Answer 4

ip addr/ifconfig

Question 5

get updates

Answer 5

sudo zypper update

Question 6

install program

Answer 6

sudo zypper in <program></program>

Question 7

search for program to install

Answer 7

sudo zypper se <keyword></keyword>

Question 8

show relevant commands for keyword

Answer 8

apropos <keyword></keyword>

Question 9

redirect standard output and overwrite existing file

Answer 9

> /1>

Question 10

command: >

Answer 10

redirect standard output and overwrite existing file

Question 11

redirect standard input and overwrite existing file

Answer 11

0>

Question 12

redirect stdout and append to file

Answer 12

> >

Question 13

output list of measurement joint poses

Answer 13

parse jp <series></series>

Question 14

output list of measurement tracker values

Answer 14

parse tv <series></series>

Question 15

show all IPs in network

Answer 15

sudo nmap -sn 192.168.0.0/24

Question 16

see if IP can be found in network

Answer 16

ping <IP></IP>

Question 17

show all open files

Answer 17

lsof (remember, that everything is a file in Linux)

Question 18

filter output of command for certain string

Answer 18

| grep <string></string>

grep <string></string>

Question 19

redirect standard error to file

Answer 19

2>

Question 20

command: 2>

Answer 20

redirect standard error to file

Question 21

get version of installed program

Answer 21

rpm -q <program></program>

Question 22

ignore output of command

Answer 22

> /dev/null

Question 23

output string to console

Answer 23

echo “<string>"</string>

Question 24

output content of file

Answer 24

cat <file></file>

Question 25

output last x lines of file

Answer 25

tail -n x <file></file>

Question 26

output first x lines of file

Answer 26

head -n x <file></file>

Question 27

see all iepcs connected to tinycray

Answer 27

iepc watch / watchServer

Question 28

show alle devices connected to CPU

Answer 28

lspci

Question 29

show all files with names containing “string” in current folder + subfolders

Answer 29

find . -name “string”

Question 30

in Zwischenablage kopieren

Answer 30

| cb

cb

Question 31

Task-Manager öffnen

Answer 31

top

Question 32

pipe something to kate in a new file

Answer 32

| kate -i

kate -i

Question 33

kill hard

Answer 33

kill -9

Question 34

copy

Answer 34

cp “source” “destination”

Question 35

move

Answer 35

mv “source” “destination”

Question 36

change user

Answer 36

su “username”

Question 37

show process ID

Answer 37

pidof “processname”

Question 38

print working directory

Answer 38

pwd

Question 39

open in background

Answer 39

… &

Question 40

kill process by name

Answer 40

killall (-9) “process name”

Question 41

open file with default program

Answer 41

xdg-open “filename”

Question 42

show all USB devices

Answer 42

lsusb

Question 43

show file type

Answer 43

file “filename”

Question 44

show calendar

Answer 44

cal

Question 45

output date and time

Answer 45

date

Question 46

copy/paste in terminal

Answer 46

ctrl + shift + c/v

Question 47

replace string1 with string2 in file1

Answer 47

sed -i ‘s/string1/string2/g’ file1

Question 48

show files in current directory

Answer 48

ls/dir

Question 49

change directory

Answer 49

cd

Question 50

show manual for command

Answer 50

man/info

Question 51

create directory

Answer 51

mkdir

Question 52

remove directory

Answer 52

rmdir / rm -r

Question 53

clear bash window

Answer 53

clear

Question 54

remove file

Answer 54

rm “filepath”

Question 55

run bash script

Answer 55

bash “script name”

Question 56

return error code of previous command

Answer 56

echo $? (1: error, 0: success)

Question 57

show last commands

Answer 57

history

Question 58

show path to binary of command

Answer 58

which “command name”

Question 59

redirect to deletion

Answer 59

> /dev/null

Question 60

redirect stdout

Answer 60

1>

Question 61

get version of installed program

Answer 61

rpm -q “program name”

Question 62

show available linux repos

Answer 62

sudo zypper refresh

Question 63

show available updates

Answer 63

sudo zypper lu

Question 64

debug in console

Answer 64

cd ~/dev/build/Debug
make install -j 1

Question 65

show only meas for sub tpt in parse

Answer 65

parse split “no of sub TPTs” “subTPT index”

Question 66

show what an alias or builtin stands for

Answer 66

type “alias or builtin”

Question 67

show all aliases

Answer 67

compgen -a

Question 68

get PID of running bash script

Answer 68

ps aux | grep “bash script name”

Question 69

show all processes

Answer 69

ps

Question 70

what should you do before searching for a package in zypper?

Answer 70

run sudo zypper refresh

Question 71

use awk to get file path from line: “! “file_path””

Answer 71

awk ‘{print $2}’

Question 72

where does find the bash_functions help?

Answer 72

isios_help

Question 73

grep option for case insensitive

Answer 73

-i

Question 74

turn color back to black when red

Answer 74

reset

Question 75

get size of directory

Answer 75

du -sh “directory name”