300 lines
3.7 KiB
HTML
300 lines
3.7 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
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<HTML
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>Conditional statements</TITLE
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CLASS="chapter"
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><H1
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><A
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NAME="chap_07"
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></A
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>Chapter 7. Conditional statements</H1
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><DIV
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CLASS="TOC"
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><DL
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><DT
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><B
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>Table of Contents</B
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></DT
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><DT
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>7.1. <A
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HREF="sect_07_01.html"
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>Introduction to if</A
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></DT
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><DD
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><DL
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><DT
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>7.1.1. <A
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HREF="sect_07_01.html#sect_07_01_01"
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>General</A
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></DT
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><DT
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>7.1.2. <A
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HREF="sect_07_01.html#sect_07_01_02"
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>Simple applications of if</A
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></DT
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></DL
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></DD
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><DT
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>7.2. <A
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HREF="sect_07_02.html"
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>More advanced if usage</A
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></DT
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><DD
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><DL
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><DT
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>7.2.1. <A
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HREF="sect_07_02.html#sect_07_02_01"
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>if/then/else constructs</A
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></DT
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><DT
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>7.2.2. <A
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HREF="sect_07_02.html#sect_07_02_02"
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>if/then/elif/else constructs</A
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></DT
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><DT
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>7.2.3. <A
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HREF="sect_07_02.html#sect_07_02_03"
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>Nested if statements</A
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></DT
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><DT
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>7.2.4. <A
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HREF="sect_07_02.html#sect_07_02_04"
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>Boolean operations</A
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></DT
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><DT
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>7.2.5. <A
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HREF="sect_07_02.html#sect_07_02_05"
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>Using the exit statement and if</A
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></DT
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></DL
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></DD
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><DT
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>7.3. <A
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HREF="sect_07_03.html"
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>Using case statements</A
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></DT
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><DD
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><DL
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><DT
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>7.3.1. <A
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HREF="sect_07_03.html#sect_07_03_01"
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>Simplified conditions</A
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></DT
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><DT
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>7.3.2. <A
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HREF="sect_07_03.html#sect_07_03_02"
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>Initscript example</A
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></DT
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></DL
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></DD
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><DT
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>7.4. <A
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HREF="sect_07_04.html"
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>Summary</A
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></DT
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><DT
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>7.5. <A
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HREF="sect_07_05.html"
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>Exercises</A
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></DT
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></DL
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></DIV
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><BLOCKQUOTE
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CLASS="ABSTRACT"
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><DIV
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CLASS="abstract"
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><A
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NAME="AEN4515"
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></A
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><P
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></P
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><P
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>In this chapter we will discuss the use of conditionals in Bash scripts. This includes the following topics:</P
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><P
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> <P
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></P
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><UL
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><LI
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><P
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>The <B
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CLASS="command"
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>if</B
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> statement</P
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></LI
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><LI
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><P
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>Using the exit status of a command</P
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></LI
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><LI
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><P
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>Comparing and testing input and files</P
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></LI
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><LI
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><P
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><B
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CLASS="command"
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>if/then/else</B
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> constructs</P
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></LI
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><LI
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><P
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><B
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CLASS="command"
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>if/then/elif/else</B
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> constructs</P
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></LI
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><LI
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><P
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>Using and testing the positional parameters</P
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></LI
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><LI
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><P
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>Nested <B
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CLASS="command"
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>if</B
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> statements</P
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></LI
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><LI
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><P
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>Boolean expressions</P
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></LI
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><LI
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><P
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>Using <B
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CLASS="command"
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>case</B
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> statements</P
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></LI
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></UL
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>
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</P
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><P
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></P
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></DIV
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></BLOCKQUOTE
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></DIV
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>Introduction to if</TD
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