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--- informatica:certificaciones:lpic:lpic-1:105_shells_and_shell_scripting [2022/04/19 10:29] – [PARTE II] tempwin
+++ informatica:certificaciones:lpic:lpic-1:105_shells_and_shell_scripting [2022/04/19 10:41] (actual) – [Test] tempwin
@@ Línea 85: / Línea 85: @@
 <code bash>
+if [ -d $dir ]
+then
+    find $dir -print
+else
+    echo "$dir no es un directorio"
+fi
 </code>
 **3. Probar el script para que muestre los resultados con un directorio válido y y forzar el error con un nombre de directorio no existente**
+Script completo:
+<code bash>
+#!/bin/bash
+dir=$1
+# Comprobar si es un directorio
+if [ -d $dir ]
+then
+    find $dir -print
+else
+    echo "$dir no es un directorio"
+    exit 1
+fi
+</code>
+===== Test =====
+**Every shell script intended to run within a bash environment, should have what identifier at the top of the script file?**
+  * ''#/bin/bash''
+  * ''!/bin/bash''
+  * ''!#/bin/bash''
+  * ''#!/bin/bash'' (**solución**)
+**Of the following conditional statements within a shell script, which one will test for the existence of a file called 'mytest.txt' in the current directory?**
+  * ''if [[$FILE is 'mytest.txt' ]];then''
+  * ''if [[ $1='mytest.txt' ]];then''
+  * ''if [[ -f mytest.txt ]];'' (**solución**)
+  * ''if [[ filename='mytest.txt' ]]; then''
+**What user script (if it exists) is run, from a user's home directory, every time they log into a system? (select 2)**
+  * ''~/.bash_profile'' (**solución**)
+  * ''/etc/rc.local''
+  * ''/etc/rc.local''
+  * ''~/.bashrc'' (**solución**)
+**Which of the following special shells that, when assigned to a user account as the default shell, will prevent that account from being able to log in? (Choose the 2 correct answers)**
+  * ''. /etc/users.deny''
+  * ''/sbin/nologin'' (**solución**)
+  * ''/etc/users.allow''
+  * ''/bin/false'' (**solución**)
+**Which of the following variable definitions will be available to subshells in the environment?**
+  * ''export MYVAR="Some Value"'' (**solución**)
+  * ''MYVAR="Some Value"''
+  * ''env MYVAR="Some Value"''
+  * None of the Above