| title | tags | use | languages | dependences |
|---|---|---|---|---|
Shell01 |
42, piscine |
README, Documentation |
shell |
#!/bin/bash id -Gn $FT_USER | tr ' ' ','| tr -d '\n'
https://linuxcommand.org/lc3_man_pages/id1.html
https://www.geeksforgeeks.org/tr-command-in-unix-linux-with-examples/
#!/bin/bash find . -type f -name '*.sh' -printf "%f\n" | sed 's/.sh$//'
o -name busca o formato do nome
o -printf define o que ele vai listar de acordo com a avaliacao booleana
o sed NÃO FAÇO PUTA IDEIA
c1r11s3% mkdir ex02 c1r11s3% cd ex02 c1r11s3% pwd /nfs/homes/gabrodri/Documents/shell01/ex02 c1r11s3% cat > find_sh.sh #!/bin/bash find . type f -name "*sh" -print"%f\n" | sed "s/.sh$//" c1r11s3% ls find_sh.sh
https://stackoverflow.com/questions/9157138/recursively-counting-files-in-a-linux-directory
find . | wc -l
wc -l → conta as pastas e arquivos, incluindo a atual
ifconfig | grep ether | awk '{print $2}'
grep ether → Filtra a informacao contida no ether (ip) awk '{print $2}' → mostra na tela apenas a segunda coluna, ontem tem a informacao do ip
sem a informacao do awk o resultado sai assim: ether 00:be:43:89:f6:c5 txqueuelen 1000 (Ethernet) ether 52:54:00:24:34:40 txqueuelen 1000 (Ethernet)
cat > "\?$*'MaRViN'*$?\" 42
basicamente é só usar os escapes para transformar o carácter especial em str
#!/bin/bash ls -l | awk "NR % 2 == 1"
mostra todas as linhas impares
cat /etc/passwd | grep -v '#' | sed '1!n;d' | cut -d':' -f1 | rev | sort -r | awk 'NR>= ENVIRON["FT_LINE1"] && NR<= ENVIRON["FT_LINE2"]' | paste -s -d"," - | sed 's/,/, /g' | sed 's/$/./' | tr -d '\n'
cat /etc/passwd | grep -v '#' | sed '1!n;d' | cut -d':' -f1 | rev | sort -r | awk 'NR>= ENVIRON["FT_LINE1"] && NR<= ENVIRON["FT_LINE2"]' | paste -s -d"," - | sed 's/,/, /g' | sed 's/$/./' | tr -d '\n'
resposta correta #!/bin/bash cat /etc/passwd | grep -v "#" | sed -n 'n;p' | cut -f 1 -d : | rev | sort -r | sed -n "$FT_LINE1,$FT_LINE2 p" | tr '\n' ',' | sed 's:,:, :g' | sed 's:, $:.:' | tr -d '\n' (ERRO: sed: -e expression #1, char 1: unknown command: `,')
cat /etc/passwd | cat grep -v "#" | retira os comentarios sed -n 'n;p' | exclui a primeira linha cut -f 1 -d : | retira ultima coluna rev | inverte sort -r | ordena sed -n "$FT_LINE1,$FT_LINE2 p" | tr '\n' ',' | translate, substitui quebra de linha por virgula sed 's:,:, :g' | sed 's:, $:.:' | tr -d '\n'
cat > add_chelou.sh echo $FT_NBR1 + $FT_NBR2 | sed 's/\/1/g' | sed 's/?/3/g' | sed 's/!/4/g' | sed "s/'/0/g" | sed "s/"/2/g" | tr "mrdoc" "01234" | xargs echo "ibase=5; obase=23;" | bc | tr "0123456789ABC" "gtaio luSnemf"