systemctl
journalctl
ctljournal
systemd -j
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/etc/security/limits.conf
/etc/sudoers
/etc/login.def
/etc/profile
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logger
logrotate
rsyslog
syslog -ng
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/root/
/etc/skel/
/etc/shell
/etc/shadow
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/etc/hostname
/etc/nsswitch.conf
/etc/hosts
/etc/networks
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userdel
userdel -f
userdel -r
Userdel -m
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UDP
TCP
ICMP
FTP
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date
clock
timedatectl
hwclock
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/etc/passwd
/etc/shadow
/etc/group
/etc/profile
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Upstart
systemd-networkd
Exim
iproute2
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Utilizando o comando wall
Desabilitando o serviço sshd
Desabilitando o login no arquivo /etc/inetd.conf
Criando o arquivo /etc/nologin e incluindo a mensagem "Sistema em Manutenção" no arquivo
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~/.bash_exit
~/.profile
~/.bashrc
~/.bash_logout
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set NOME
env $NOME
export NOME
Export $NOME
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/etc/cups/cupsd.conf
/etc/cups/printers.conf
/etc/cupsd.cfg
/etc/cups/classes.conf
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chage
ulimit
Isof
usermod
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find / -perm -g=s
find / -perm -4000
find / -type suid
find / -perm SUID
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Impedir que um mesmo caractere seja incluído múltiplas vezes quando a tecla for continuamente pressionada
Auxiliar usuários que possuem dificuldades em pressionar mais de uma tecla ao mesmo tempo.
Aumentar o tamanho das letras na tela do terminal
Possibilitar o uso, através de um mouse, de um teclado virtual que é exibido na tela
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Indicar outro login para o qual o usuário será redirecionado após digitar usuário e senha
Vincular nomes diferentes para o e-mail deste usuário
Redirecionar e-mails enviados para a conta deste usuário para um ou vários destinatários diferentes
Redirecionar as conexões SSH abertas para esse usuário para outra máquina.
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aliases
updatedb
newaliases
mtaupdate
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/etc/ntp/servers.conf
/etc/ntp.conf
/etc/pool.ntp.conf
/etc/services
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XDM
Xfce
KDE
MInt
GNOME
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Procmail
Sendmail
Postfix
Postgree
Exim
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/etc/shadow
/etc/login
/etc/skel
/etc/passwd
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/usr/share/cron
/var/spool/cron
/var/lock/crontab/
/var/crontab/
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lpadmin -l
lpstat -t
lpinfo -m
cupd -list
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$#
$?
$$
$*
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ntpq
ntpd
ntpdate
datetimectl
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hostname
timedatectl
host
hostnamectl
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/etc/sshd.conf
/etc/ssh/ssh_config
/etc/ssh/sshd_config
/etc/security/limits.conf
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LC_NUMERIC
LC_TIME
TZ_DATETIME
LANG_TIME
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Se um grupo for o grupo primário de algum usuário do sistema, ele não poderá ser removido pelo comando groupdel sem o uso da opção -f
É possível alterar o GID (Group ID) de um grupo com o comando groupmod
Não é possível alterar o nome de um grupo após sua criação
Com o comando usermod, é necessário utilizar a opção -a junto com a opção -G para se adicionar novos grupos complementares sem que os grupos anteriores sejam perdidos
A associação de um usuário a um grupo é opcional no Linux
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25
123
161
465
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/var/log/x11.log
/var/log/xerrors.out
~/x11.log
~/.xsession-errors
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255.255.255.0
255.255.255.128
255.255.255.192
255.255.255.248
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O usuário poderá utilizar o comando crontab livremente
O usuário só poderá visualizar os agendamentos já realizados mas não conseguirá criar novos agendamentos
O usuário não poderá utilizar nenhum recurso da cron
O usuário não poderá visualizar, editar ou criar novos agendamentos, mas os agendamentos realizados anteriormente continuarão funcionado.
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syslog
user
local0
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O arquivo /etc/networks será o primeiro a ser consultado na necessidade de resolução de um nome em um IP
O arquivo /etc/resolv.conf será o primeiro a ser consultado para resolução de DNS
As informações contidas no arquivo /etc/hosts terão prioridade às informações retornada pelos servidores DNS
O servidor DNS será a fonte primária de dados na resolução de nomes
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telnet 172.16.12.1:1234
nc 172.16.12.1 1234
netstat 172.16.12.1 1234
netcat -l 172.16.12.1 1234
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Set the parameters “encrypt passwords = yes” and “password file = /etc/passwd”
Set the parameters “encrypt passwords = yes”, “password file = /etc/passwd” and “password algorithm = crypt”
Delete the smbpasswd file and create a symbolic link to the passwd and shadow file
It is not possible for Samba to use /etc/passwd and /etc/shadow directly
Run smbpasswd to convert /etc/passwd and /etc/shadow to a Samba password file
Display Manager
Login Manager
GUI
Windows Manager
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Listen
Port
Accept
ListenStream
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4 6 8 10 12 14 16 18 20
2 6 10 14 18
2 6 10 14 18
4 6 8 10 12 14 16 18 20
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gpgd
gpg-agent
ssh-agent
gpg-keys
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tzselect
tzdat
timedatectl
locate
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nmcli show enp0s3
nmcli dev enp0s3
nmcli dev show enp0s3
nmcli connection enp0s3
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netstat -altn
netstat -nalp
ss -na
ss -ltn
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/usr/share/zoneinfo/
/etc/timezone/
/etc/localtime/
/usr/share/timezone
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ip addr add +eth1 10.0.0.50/24 eth1
ip address add eth1:0 10.0.0.50/24 dev eth1
ip address add 10.0.0.50 netmask 255.255.255.0 dev eth1
ip addr add 10.0.0.50/24 dev eth1
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Quiz Review Timeline (Updated): Jul 10, 2023 +
Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.
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