Update README.md

Author: masmail-quicknotes

README.md

@@ -42,7 +42,7 @@
     \# Completed on Thu Mar  5 11:22:52 2020
 
     cat /etc/rsyslog.d/40-iptables.conf 
-    :msg, regex, "iptables:" -/var/log/firewall.log \
+    :msg, regex, "iptables:" -/var/log/firewall.log
      & ~
 
     sudo /etc/init.d/rsyslog restart
@@ -75,96 +75,103 @@ Ejemplo fichero netplan:
 # Bash
 
 ## Ejemplo Bucle For
-> for i in $(ls -a); do echo "fichero ${i}"; done
+    for i in $(ls -a); do echo "fichero ${i}"; done
 
 ## Ejemplo Bucle While infinito
-> while [ true ]; do echo "hello world\n"; sleep 3; done
+    while [ true ]; do echo "hello world\n"; sleep 3; done
 
 ***
 
 # Shell-script
 
 # Inicio bash
 
-> #!/bin/bash \
-> \
-> ECHO=$(which echo) \
-> CAT=$(which cat) \
-> NMAP=$(which nmap) \
-> RM=$(which rm) \
-> DIFF=$(which diff) \
-> ...
+    #!/bin/bash
+    
+    ECHO=$(which echo)
+    CAT=$(which cat)
+    NMAP=$(which nmap)
+    RM=$(which rm)
+    DIFF=$(which diff)
+     ...
 
 # Function 
 
-> function Usage () { \
->         ${ECHO} -e "SYNTAX ERROR: ${0} [opcion1|opcion2] <nombre>\n" \
->         exit 1 \
-> } \
+    function Usage () {
+            ${ECHO} -e "SYNTAX ERROR: ${0} [opcion1|opcion2] <nombre>\n"
+            exit 1
+    }
 
 ## if - elif - else - fi  
 
 Verificamos los parametros si son nulos, y si primer parametro contiene valor correcto.
 
-> if [[ -z ${1} ]] || [[ -z ${2} ]] ; then \
->         Usage \
-> elif [[ "${1}" != "opcion1" ]] && [[ "${1}" != "opcion2" ]] ; then \
->         Usage \
-> else \
-> 	accion="${1}" \
-> 	nombre="${2}" \
-> fi
+    if [[ -z ${1} ]] || [[ -z ${2} ]] ; then
+      Usage
+    elif [[ "${1}" != "opcion1" ]] && [[ "${1}" != "opcion2" ]] ; then
+      Usage
+    else
+    	accion="${1}"
+    	nombre="${2}"
+    fi
 
 Si fichero existe entonces lo borramos:
 
->   if [[ -f "${nombreFichero}" ]] ; then \
->      ${RM} ${nombreFichero} \
->   fi
+    if [[ -f "${nombreFichero}" ]] ; then
+      ${RM} ${nombreFichero}
+    fi
 
 
 ## Petición parámetros
 
-> ${ECHO} "Introduce un nombre:" \
-> read -s nombre
+    ${ECHO} "Introduce un nombre:"
+    read -s nombre
 
 ## Case 
 
->   case $opcion in \
->       0) \
->          ${ECHO} -e "[CORRECTO];" \
->          ;; \
->       *) \
->          ${ECHO} -e "[INCORRECTO];" \
->          ;; \
->   esac \
+    case $opcion in
+      0)
+        ${ECHO} -e "[CORRECTO];"
+        ;;
+      *)
+        ${ECHO} -e "[INCORRECTO];"
+        ;;
+    esac
 
 ***
 # Diff
 
 ## Ejemplo visualización en columnas
-> diff -y fichero1.txt fichero2.txt
+
+    diff -y fichero1.txt fichero2.txt
 
 ## Ejemplo comparar sin diferenciar espacios en blanco ni tabuladores
-> diff -wEZB  fichero1.txt fichero2.txt
+
+    diff -wEZB  fichero1.txt fichero2.txt
 
 ## Ejemplo modo silencioso
+
 Importa el resultado del commando diff result=0 EXIT OK, result=1 FAIL.
-> result=$(diff -q --ignore-matching-lines="ntp clock-period" fichero1.txt fichero2.txt)
+
+    result=$(diff -q --ignore-matching-lines="ntp clock-period" fichero1.txt fichero2.txt)
 
 ## Ejemplo ignorando lineas
+
 Las líneas con contenido "ntp clock-period" son ignoradas.
-> diff --ignore-matching-lines="ntp clock-period" fichero1.txt fichero2.txt
+
+    diff --ignore-matching-lines="ntp clock-period" fichero1.txt fichero2.txt
 
 ## Comandos utilies del diff 
-> diff \
->       --suppress-blank-empty     suppress space or tab before empty output lines   \            
->       -y, --side-by-side         output in two columns \
->       -w, --ignore-all-space     ignore all white space \
->       -B, --ignore-blank-lines   ignore changes where lines are all blank \
->       -i, --ignore-case          ignore case differences in file contents \
->       -E, --ignore-tab-expansion ignore changes due to tab expansion \
->       -q, --brief                report only when files differ \
->       --suppress-common-lines    do not output common lines \
+
+    diff \
+          --suppress-blank-empty     suppress space or tab before empty output lines
+          -y, --side-by-side         output in two columns
+          -w, --ignore-all-space     ignore all white space
+          -B, --ignore-blank-lines   ignore changes where lines are all blank
+          -i, --ignore-case          ignore case differences in file contents
+          -E, --ignore-tab-expansion ignore changes due to tab expansion
+          -q, --brief                report only when files differ
+          --suppress-common-lines    do not output common lines
 
 ***