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diff --git a/shell-workshop/session.html b/shell-workshop/session.html deleted file mode 100644 index 1a5da6e..0000000 --- a/shell-workshop/session.html +++ /dev/null @@ -1,381 +0,0 @@ -<h2>Shell Input</h2> - -<pre><code>sh@sleipnir1:~$ vim hello.sh -sh@sleipnir1:~$ cat hello.sh -echo Hello world -sh@sleipnir1:~$ sh hello.sh -Hello world -sh@sleipnir1:~$ sh -c 'echo Hello world' -Hello world -sh@sleipnir1:~$ echo Hello world -Hello world -</code></pre> - -<h2>Comments, Magic Number Behavior, and File Modes</h2> - -<pre><code>sh@sleipnir1:~$ vim hello.sh -sh@sleipnir1:~$ cat hello.sh -#! /bin/sh -# This is a comment -echo Hello world -sh@sleipnir1:~$ ./hello.sh --su: ./hello.sh: Permission denied -sh@sleipnir1:~$ ls -l hello.sh --rw-r--r-- 1 sh sh 48 Mar 30 13:26 hello.sh -sh@sleipnir1:~$ chmod a+x hello.sh -sh@sleipnir1:~$ ls -l hello.sh --rwxr-xr-x 1 sh sh 48 Mar 30 13:26 hello.sh -sh@sleipnir1:~$ ./hello.sh -Hello world -</code></pre> - -<h2>Field Splitting and Quoting</h2> - -<pre><code>sh@sleipnir1:~$ mkdir foo bar -sh@sleipnir1:~$ ls -bar foo hello.sh -sh@sleipnir1:~$ rmdir foo bar -sh@sleipnir1:~$ mkdir foo\ bar -sh@sleipnir1:~$ ls -foo bar hello.sh -sh@sleipnir1:~$ rmdir foo\ bar -sh@sleipnir1:~$ ls -hello.sh -sh@sleipnir1:~$ mkdir 'foo bar -> baz' -sh@sleipnir1:~$ ls -foo bar?baz hello.sh -sh@sleipnir1:~$ rmdir 'foo bar -> baz' -sh@sleipnir1:~$ ls -hello.sh -sh@sleipnir1:~$ mkdir "foo bar baz" -sh@sleipnir1:~$ ls -foo bar baz hello.sh -</code></pre> - -<h2>Tilde Expansion</h2> - -<pre><code>sh@sleipnir1:~$ echo ~ -/home/sh -sh@sleipnir1:~$ ls ~sh-foo -another-directory another-file bar baz foo some-directory some-file -sh@sleipnir1:~$ ls ~sh-foo/some-directory -Hey, this is a cool file! -</code></pre> - -<h2>Pathname Expansion</h2> - -<pre><code>sh@sleipnir1:~$ echo ~sh-foo/*-file -/home/sh-foo/another-file /home/sh-foo/some-file -sh@sleipnir1:~$ echo ~sh-foo/ba*/file -/home/sh-foo/bar/file /home/sh-foo/baz/file -sh@sleipnir1:~$ echo ~sh-foo/ba[a-r]/file -/home/sh-foo/bar/file -sh@sleipnir1:~$ echo ~sh-foo/ba[p-z]/file -/home/sh-foo/bar/file /home/sh-foo/baz/file -</code></pre> - -<h2>Parameter Assignment</h2> - -<pre><code>sh@sleipnir1:~$ myparam=foo -sh@sleipnir1:~$ mynum=1 -</code></pre> - -<h2>Parameter Expansion</h2> - -<pre><code>sh@sleipnir1:~$ echo ${myparam} -foo -sh@sleipnir1:~$ echo ${nullparam:-default} -default -sh@sleipnir1:~$ echo ${#myparam} -3 -sh@sleipnir1:~$ file=main.c -sh@sleipnir1:~$ echo ${file%.c}.o -main.o -sh@sleipnir1:~$ dir=foo/bar/baz -sh@sleipnir1:~$ echo ${dir##*/} -baz -</code></pre> - -<h2>Positional Parameters</h2> - -<pre><code>sh@sleipnir1:~$ vim pos-params.sh -sh@sleipnir1:~$ cat pos-params.sh -#! /bin/sh -echo ${1} -echo ${2} -sh@sleipnir1:~$ chmod a+x pos-params.sh -sh@sleipnir1:~$ ./pos-params.sh foo -foo - -sh@sleipnir1:~$ sh pos-params.sh foo bar baz -foo -bar -</code></pre> - -<h2>Special Parameters</h2> - -<pre><code>sh@sleipnir1:~$ vim spec-params.sh -sh@sleipnir1:~$ cat spec-params.sh -#! /bin/sh - -echo Number of positional parameters: ${#} -echo Positional parameters: ${@} -echo Script name: ${0} -sh@sleipnir1:~$ sh spec-params.sh foo bar baz -Number of positional parameters: 3 -Positional parameters: foo bar baz -Script name: spec-params.sh -</code></pre> - -<h2>Exit Statuses</h2> - -<pre><code>sh@sleipnir1:~$ vim spec-params.sh -sh@sleipnir1:~$ cat spec-params.sh -#! /bin/sh - -echo Number of positional parameters: ${#} -echo Positional parameters: ${@} -echo Script name: ${0} -true -echo ${?} -false -echo ${?} -sh@sleipnir1:~$ sh spec-params.sh foo bar baz -Number of positional parameters: 3 -Positional parameters: foo bar baz -Script name: spec-params.sh -0 -1 -</code></pre> - -<h2>Shell Variables and Links <code>.</code> and <code>..</code></h2> - -<pre><code>sh@sleipnir1:~$ echo ${HOME} -/home/sh -sh@sleipnir1:~$ echo ${PWD} -/home/sh -sh@sleipnir1:~$ ls -foo bar baz hello.sh pos-params.sh spec-params.sh -sh@sleipnir1:~$ cd foo\ bar\ baz/ -sh@sleipnir1:~/foo bar baz$ echo ${PWD} -/home/sh/foo bar baz -sh@sleipnir1:~/foo bar baz$ ls . -sh@sleipnir1:~/foo bar baz$ mkdir file1 file2 -sh@sleipnir1:~/foo bar baz$ ls . -file1 file2 -sh@sleipnir1:~/foo bar baz$ ls .. -foo bar baz hello.sh pos-params.sh spec-params.sh -sh@sleipnir1:~/foo bar baz$ cd .. -sh@sleipnir1:~$ echo ${PWD} -/home/sh -sh@sleipnir1:~$ PS1='$ ' -$ PS1='PROMPT> ' -PROMPT> echo Hello -Hello -PROMPT> PS1='$ ' -$ echo Hello \ -> World -Hello World -</code></pre> - -<h2>Command Substitution</h2> - -<pre><code>$ filepath=$(basename ~sh-foo/bar/file) -$ echo ${filepath} -file -</code></pre> - -<h2>Arithmetic Expansion</h2> - -<pre><code>$ echo $((2+3)) -5 -$ echo $((0x10 + 4)) -20 -$ i=0 -$ i=$(($i + 1)) -$ echo ${i} -1 -$ i=$(($i + 1)) -$ echo ${i} -2 -$ i=$(($i + 1)) -$ echo ${i} -3 -</code></pre> - -<h2>Simple Commands</h2> - -<pre><code>$ i=0 echo Hello -Hello -</code></pre> - -<h2>Command Search and Execution</h2> - -<pre><code>$ echo ${PATH} -/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games -$ ./hello.sh -Hello world -$ hello.sh --su: hello.sh: command not found -$ ls -foo bar baz hello.sh pos-params.sh spec-params.sh -$ PATH=${PATH}:${HOME} -$ echo ${PATH} -/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/home/sh -$ hello.sh -Hello world -</code></pre> - -<h2>Pipelines</h2> - -<pre><code>$ ! true -$ echo ${?} -1 -$ ! false -$ echo ${?} -0 -$ true -$ echo ${?} -0 -$ false -$ echo ${?} -1 -</code></pre> - -<h2>Lists</h2> - -<pre><code>$ false && echo foo || echo bar -bar -$ true || echo foo && echo bar -bar -</code></pre> - -<h2><code>test</code> Command and <code>if</code> Construct</h2> - -<pre><code>$ [ foo = foo ] && echo equal || echo not equal -equal -$ if [ foo = foo ]; then echo equal else echo not equal; fi -equal else echo not equal -$ if [ foo = foo ]; then echo equal; else echo not equal; fi -equal -$ if [ foo = foo ]; then -> echo equal -> else -> echo not equal -> fi -equal -</code></pre> - -<h2><code>while</code> Loop</h2> - -<pre><code>$ i=0 -$ while [ ${i} -lt 5 ]; do -> echo ${i} -> i=$(($i + 1)) -> done -0 -1 -2 -3 -4 -$ vim param-loop.sh -$ cat param-loop.sh -while [ ${#} -gt 0 ]; do - echo Parameter: ${1} - shift -done -$ sh param-loop.sh foo bar baz -Parameter: foo -Parameter: bar -Parameter: baz -</code></pre> - -<h2><code>for</code> Loop</h2> - -<pre><code>$ for param in foo bar baz; do -> echo ${param} -> done -foo -bar -baz -</code></pre> - -<h2><code>case</code> Construct</h2> - -<pre><code>$ param=foo -$ case ${param} in -> f*) -> echo starts with f -> ;; -> b*) -> echo starts with b -> ;; -> esac -starts with f -</code></pre> - -<h2>Functions</h2> - -<pre><code>$ print_hello() -> { -> echo Hello world -> } -$ print_hello -Hello world -$ print_params() -> { -> echo ${@} -> } -$ print_params 1 2 3 -1 2 3 -</code></pre> - -<h2>Input/Output Redirection</h2> - -<pre><code>$ echo Hello world > hello-file -$ cat hello-file -Hello world -$ echo Hello world > hello-file -$ echo Hello world > hello-file -$ echo Hello world > hello-file -$ cat hello-file -Hello world -$ echo Hello world >> hello-file -$ echo Hello world >> hello-file -$ cat hello-file -Hello world -Hello world -Hello world -$ vim read-file.sh -$ cat read-file.sh -while read line; do - echo Line: ${line} -done < myfile.txt -$ sh read-file.sh -Line: line one -Line: line two -Line: some other line -$ vim read-file.sh -$ cat read-file.sh -while read field1 field2; do - echo Line: ${field1}, ${field2} -done < myfile.txt -$ sh read-file.sh -Line: line, one -Line: line, two -Line: some, other line -$ echo Hello world > /dev/null -$ sh -c not-a-command -sh: 1: not-a-command: not found -$ sh -c not-a-command 2> /dev/null -$ while read line; do -> echo Line: ${line} -> done <<EOF -> this is input -> some more input -> EOF -Line: this is input -Line: some more input -</code></pre> |