crgimenes / terminal

Material para estudo para o uso do terminal (shells, scripts, comandos, tutoriais, etc.)

Terminal

Controle de processos

jobs
bg %1
fg %1
kill %1
kill -9 %1
wait %1
disown %1
nohup command &
ps
top, htop, btop
killall
pkill
pgrep
renice
nice
ionice
at
cron

Redirecionamento

command > file command >> file command < file command 2> file command 2>> file

Pipe

command1 | command2 command1 | command2 | command3

Variáveis de ambiente

env set unset VAR export VAR=value PATH=$PATH:/new/path echo $PATH

Shell script

#!/bin/bash
# Comentário
echo "Hello, World!"

Variáveis de shell

$VAR ${VAR} $0, $1, $2, $3, $4, $5, $6, $7, $8, $9 $#, $*, $@ $?, $$

Estruturas de controle

if [ condition ]; then
    command
elif [ condition ]; then
    command
else
    command
fi

for VAR in list; do
    command
done

while [ condition ]; do
    command
done

case $VAR in
    pattern1)
        command
        ;;
    pattern2)
        command
        ;;
    *)
        command
        ;;
esac

Funções

function_name() {
    command
}

function_name() {
    command
    return value
}

Comandos úteis

find

find /path -name "file"

grep

grep "pattern" file

tr

tr 'a' 'A' < file

sed

sed 's/pattern/replacement/' file

awk

awk '{print $1}' file

cut

cut -d' ' -f1 file

sort

sort file

uniq

uniq file

wc

wc file

head

head -n5 file

tail

tail -n5 file