Scripturi BASH

Exemple scripturi BASH

Script ce elimina zona asociata unui domeniu dat ca parametru de intrare

Puteţi elimina porţiunea din named.conf de la zone "nume.domeniu.dat.ca.parametru.de.intrare" { până la acolada închisă asociată acoladei deschise de mai sus.

Scriptul este:

#!/bin/bash

# Bind zone remove script
#
# Copyright (C) 2005 Silvian Cretu <silvian86@yahoo.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. 

if [ ! $# = 1 ]; then
    echo "Usage: $0 domain";
    echo "The path to named.conf is defined inside the script";
    		 else
	pathToNamedDotConf=/etc/named.conf
	
	x=$(grep -n "zone \"$1\" {" $pathToNamedDotConf | cut -f1 -d:)
	sed $x,/\}\;/d $pathToNamedDotConf > temp
	c=$(sed -n $x'p' < temp)
	if [ "x`echo $c | grep "zone"`" = "x" ]
	then
		sed $x' d' temp > $pathToNamedDotConf
	else
		cat temp > $pathToNamedDotConf
	fi
	rm -f temp
	exit
fi

Cautarea unui fisier ce contine un anumit string

find /path -name "*" -exec grep -H "<string>"  '{}' \;

sau

grep -Hr "<string>" /path/

Fireste, <string> poate fi atat un sir de caractere cat si orice fel de expresie regulata suportata de versiunea particulara de grep disponibila pe masina in cauza.
Deasemenea, pentru a cauta fara a face diferenta intre majuscule si minuscule, adaugati parametrul -i la grep.

Stergerea fisierelor backup

Asa cum stiti, prin traditie in *NIX, editoarele text fac o copie de siguranta fisierelor editate, copie de siguranta ce este denumita identic cu fisierul initial plus caracterul tilda (~). Ei bine... in cazul aplicatiilor web, acest backup mai mult dauneaza decat sa ajute. Nu ar fi prea placut sa aveti un index.php~ in DocumentRoot

find /path -name "*~" -exec rm -f '{}' \;

Probleme cu spatiul pe disc?

Nu stiti unde "vi s-a dus" spatiul de pe disc si e cam greu sa verificati fiecare director in parte?
Linia urmatoare va ajuta, facand totodata si o sortare.

du --max-depth=1 /path | sort -rn

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