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wiki2:linux_scripting
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Muestra las diferencias entre dos versiones de la página.
| Ambos lados, revisión anterior Revisión previa Próxima revisión | Revisión previa | ||
|
wiki2:linux_scripting [2016/12/01 11:40] alfred |
wiki2:linux_scripting [2020/05/09 09:25] (actual) |
||
|---|---|---|---|
| Línea 1: | Línea 1: | ||
| ====== Linux Programming ====== | ====== Linux Programming ====== | ||
| + | Usar la salida del último comando (volviendolo a ejecutar): | ||
| <code> | <code> | ||
| $ > echo pierre | $ > echo pierre | ||
| Línea 8: | Línea 8: | ||
| my name is pierre | my name is pierre | ||
| </code> | </code> | ||
| + | Exit status del último comando: | ||
| <code> | <code> | ||
| - | $ ./tmp.sh | + | $ touch /root/test |
| touch: cannot touch '/root/test': Permission denied | touch: cannot touch '/root/test': Permission denied | ||
| $ echo $? | $ echo $? | ||
| Línea 18: | Línea 19: | ||
| $ ls $(echo ~) | $ ls $(echo ~) | ||
| </code> | </code> | ||
| + | Guardarlo en una variable | ||
| <code> | <code> | ||
| alfred@alfred-Y50-70 ~/Desktop $ a=$(python crawler.py) | alfred@alfred-Y50-70 ~/Desktop $ a=$(python crawler.py) | ||
| alfred@alfred-Y50-70 ~/Desktop $ echo $a | alfred@alfred-Y50-70 ~/Desktop $ echo $a | ||
| + | </code> | ||
| + | |||
| + | Run with root: | ||
| + | <code> | ||
| + | if [ "$(id -u)" != "0" ]; then | ||
| + | echo "This script must be run as root" 1>&2 | ||
| + | exit 1 | ||
| + | fi | ||
| + | </code> | ||
| + | Si quieres que el script pare cuando haya un error interno añade la siguiente línea al inicio de este: | ||
| + | <code> | ||
| + | set -e | ||
| + | </code> | ||
| + | ===== Fast notes ===== | ||
| + | === Check if a directory or file exists === | ||
| + | Looking the status code of: | ||
| + | <code> | ||
| + | test -d /path | ||
| + | </code> | ||
| + | |||
| + | === Wait to press a key === | ||
| + | |||
| + | <code> | ||
| + | read -n1 -r -p "Press any key to continue..." key; | ||
| + | </code> | ||
| + | |||
| + | === Override a line in a config file === | ||
| + | <code> | ||
| + | sed -i 's/# auth-access = write/auth-access = write/' src/conf/svnserve.conf | ||
| + | sed -i 's/# password-db = passwd/password-db = passwd/' doc/conf/svnserve.conf | ||
| + | </code> | ||
| + | |||
| + | === Get formatted data === | ||
| + | get year-month-day from date | ||
| + | <code> | ||
| + | DATE=`date +%Y-%m-%d` | ||
| + | </code> | ||
| + | get year-month-day hour:minute:second from date | ||
| + | <code> | ||
| + | DATE=`date '+%Y-%m-%d %H:%M:%S'` | ||
| + | </code> | ||
| + | <code> | ||
| + | $ DATE=$(date +%y%m%d) | ||
| + | $ echo $DATE | ||
| + | 190523 | ||
| + | </code> | ||
| + | ===== Examples ===== | ||
| + | Some Django shortcuts: | ||
| + | <code> | ||
| + | resetmigrations() { | ||
| + | if [ -z "$1" ] | ||
| + | then | ||
| + | echo "No database supplied" | ||
| + | return | ||
| + | fi | ||
| + | echo "The $1 database is going to be reseted"; | ||
| + | read -n1 -r -p "Press any key to continue..." key; | ||
| + | find . -path "*/migrations/*.py" -not -name "__init__.py" -delete | ||
| + | find . -path "*/migrations/*.pyc" -delete | ||
| + | export PGPASSWORD=mysecretpassword; | ||
| + | dropdb -h 127.0.0.1 -U postgres $1 | ||
| + | createdb -T template0 -h 127.0.0.1 -U postgres $1 | ||
| + | python manage.py makemigrations | ||
| + | python manage.py migrate | ||
| + | } | ||
| </code> | </code> | ||
wiki2/linux_scripting.1480592412.txt.gz · Última modificación: 2020/05/09 09:24 (editor externo)
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