Beispiele und Notizen 16.4.2021

20210416/.test.txt

+Punkt-Test

20210416/calculate

+#!/usr/bin/bc -q
+
+2 ^ 50 / 10 / 1000 / 1000 / 1000000
+
+quit

20210416/cd..

+#pwd
+cd ..
+#pwd

20210416/chmod-1.txt

+-rwxr-xr-x 1 peter peter   16 Apr 16 14:20 cd..
+cassini/home/peter/bo/2021ss/bs/20210416> chmod 750 cd..
+cassini/home/peter/bo/2021ss/bs/20210416> ls -l cd..
+-rwxr-x--- 1 peter peter 16 Apr 16 14:20 cd..
+cassini/home/peter/bo/2021ss/bs/20210416> chmod 644 cd..
+cassini/home/peter/bo/2021ss/bs/20210416> ls -l cd..
+-rw-r--r-- 1 peter peter 16 Apr 16 14:20 cd..
+cassini/home/peter/bo/2021ss/bs/20210416> chmod 660 cd..
+cassini/home/peter/bo/2021ss/bs/20210416> ls -l cd..
+-rw-rw---- 1 peter peter 16 Apr 16 14:20 cd..
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/find-1.txt

+cassini/home/peter/bo/2021ss/bs/20210416> find . -name "*.txt"
+./shell-scripts-4.txt
+./shell-scripts-2.txt
+./test-3.txt
+./shell-scripts-3.txt
+./symlinks-3.txt
+./wildcards-1.txt
+./wildcards-3.txt
+./shell-scripts-5.txt
+./shell-scripts-6.txt
+./hardlinks-1.txt
+./.test.txt
+./test/hello.txt
+./chmod-1.txt
+./wildcards-2.txt
+./hardlinks-2.txt
+./shell-scripts-1.txt
+./symlinks-4.txt
+./mount-1.txt
+./test-1.txt
+./grep-3.txt
+./grep-1.txt
+./symlinks-1.txt
+./symlinks-2.txt
+./grep-2.txt

20210416/find-2.txt

+cassini/home/peter/bo/2021ss/bs/20210416> find . -name *.txt
+find: paths must precede expression: `find-1.txt'
+find: possible unquoted pattern after predicate `-name'?

20210416/find-3.txt

+cassini/home/peter/bo/2021ss/bs/20210416> echo find . -name *.txt
+find . -name chmod-1.txt find-1.txt find-2.txt grep-1.txt grep-2.txt grep-3.txt hardlinks-1.txt hardlinks-2.txt mount-1.txt shell-scripts-1.txt shell-scripts-2.txt shell-scripts-3.txt shell-scripts-4.txt shell-scripts-5.txt shell-scripts-6.txt symlinks-1.txt symlinks-2.txt symlinks-3.txt symlinks-4.txt test-1.txt test-3.txt wildcards-1.txt wildcards-2.txt wildcards-3.txt
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/find-4.txt

+cassini/home/peter/bo/2021ss/bs/20210416> find . -name "*".txt
+./shell-scripts-4.txt
+./shell-scripts-2.txt
+./test-3.txt
+./shell-scripts-3.txt
+./symlinks-3.txt
+./wildcards-1.txt
+./wildcards-3.txt
+./shell-scripts-5.txt
+./shell-scripts-6.txt
+./hardlinks-1.txt
+./.test.txt
+./test/hello.txt
+./chmod-1.txt
+./wildcards-2.txt
+./find-1.txt
+./hardlinks-2.txt
+./shell-scripts-1.txt
+./symlinks-4.txt
+./mount-1.txt
+./test-1.txt
+./grep-3.txt
+./find-2.txt
+./grep-1.txt
+./symlinks-1.txt
+./find-3.txt
+./symlinks-2.txt
+./grep-2.txt
+cassini/home/peter/bo/2021ss/bs/20210416> echo find . -name "*".txt
+find . -name *.txt

20210416/grep-1.txt

+cassini/home/peter/bo/2021ss/bs/20210416> grep -r Hello *.*
+hello.c:  printf ("Hello, world!\n");
+unix-20210416.tex:        printf ("Hello, world!\n");
+unix-20210416.tex:      Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
+cassini/home/peter/bo/2021ss/bs/20210416> grep -r Hello *
+hello.c:  printf ("Hello, world!\n");
+test/hello.txt:Hello, world!
+unix-20210416.tex:        printf ("Hello, world!\n");
+unix-20210416.tex:      Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/grep-2.txt

+cassini/home/peter/bo/2021ss/bs/20210416> grep -r Hello .*
+./hello.c:  printf ("Hello, world!\n");
+./test/hello.txt:Hello, world!
+./grep-1.txt:cassini/home/peter/bo/2021ss/bs/20210416> grep -r Hello *.*
+./grep-1.txt:hello.c:  printf ("Hello, world!\n");
+./grep-1.txt:unix-20210416.tex:        printf ("Hello, world!\n");
+./grep-1.txt:unix-20210416.tex:      Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
+./grep-1.txt:cassini/home/peter/bo/2021ss/bs/20210416> grep -r Hello *
+./grep-1.txt:hello.c:  printf ("Hello, world!\n");
+./grep-1.txt:test/hello.txt:Hello, world!
+./grep-1.txt:unix-20210416.tex:        printf ("Hello, world!\n");
+./grep-1.txt:unix-20210416.tex:      Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
+../20210416/hello.c:  printf ("Hello, world!\n");
+../20210416/test/hello.txt:Hello, world!
+../20210416/grep-1.txt:cassini/home/peter/bo/2021ss/bs/20210416> grep -r Hello *.*
+../20210416/grep-1.txt:hello.c:  printf ("Hello, world!\n");
+../20210416/grep-1.txt:unix-20210416.tex:        printf ("Hello, world!\n");
+../20210416/grep-1.txt:unix-20210416.tex:      Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
+../20210416/grep-1.txt:cassini/home/peter/bo/2021ss/bs/20210416> grep -r Hello *
+../20210416/grep-1.txt:hello.c:  printf ("Hello, world!\n");
+../20210416/grep-1.txt:test/hello.txt:Hello, world!
+../20210416/grep-1.txt:unix-20210416.tex:        printf ("Hello, world!\n");
+../20210416/grep-1.txt:unix-20210416.tex:      Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
+../20210409/unix-20210409.tex:        printf ("Hello, world!\n");
+../20210409/unix-20210409.tex:      Text schreiben: \lstinline[style=cmd]{echo "Hello, world!"}
+../20210409/hello.c:  printf ("Hello, world!\n");
+../20210409/shell-variables-2.txt:Hello, world!
+../20210409/shell-variables-2.txt:Hello, world!
+../20210409/shell-variables-2.txt:Hello, world!
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/grep-3.txt

+cassini/home/peter/bo/2021ss/bs/20210416> echo grep -r Hello .*
+grep -r Hello . .. .test.txt

20210416/hardlinks-1.txt

+cassini/home/peter/bo/2021ss/bs/20210416> ls -l test-*.txt
+-rw-r--r-- 1 peter peter  7 Apr 16 12:30 test-2.txt
+lrwxrwxrwx 1 peter peter 10 Apr 16 14:37 test-3.txt -> test-1.txt
+cassini/home/peter/bo/2021ss/bs/20210416> ln test-2.txt test-1.txt
+cassini/home/peter/bo/2021ss/bs/20210416> ls -l test-*.txt
+-rw-r--r-- 2 peter peter  7 Apr 16 12:30 test-1.txt
+-rw-r--r-- 2 peter peter  7 Apr 16 12:30 test-2.txt
+lrwxrwxrwx 1 peter peter 10 Apr 16 14:37 test-3.txt -> test-1.txt
+cassini/home/peter/bo/2021ss/bs/20210416> cat test-1.txt
+Test 2
+cassini/home/peter/bo/2021ss/bs/20210416> cat test-2.txt
+Test 2
+cassini/home/peter/bo/2021ss/bs/20210416> echo "Test 1" > test-1.txt
+cassini/home/peter/bo/2021ss/bs/20210416> cat test-1.txt
+Test 1
+cassini/home/peter/bo/2021ss/bs/20210416> cat test-2.txt
+Test 1
+cassini/home/peter/bo/2021ss/bs/20210416> ls -l test-*.txt
+-rw-r--r-- 2 peter peter  7 Apr 16 14:47 test-1.txt
+-rw-r--r-- 2 peter peter  7 Apr 16 14:47 test-2.txt
+lrwxrwxrwx 1 peter peter 10 Apr 16 14:37 test-3.txt -> test-1.txt
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/hardlinks-2.txt

+cassini/home/peter/bo/2021ss/bs/20210416> ls -l test-*.txt
+-rw-r--r-- 2 peter peter  7 Apr 16 14:47 test-1.txt
+-rw-r--r-- 2 peter peter  7 Apr 16 14:47 test-2.txt
+lrwxrwxrwx 1 peter peter 10 Apr 16 14:37 test-3.txt -> test-1.txt
+cassini/home/peter/bo/2021ss/bs/20210416>
+cassini/home/peter/bo/2021ss/bs/20210416> rm test-2.txt
+cassini/home/peter/bo/2021ss/bs/20210416> ls -l test-*.txt
+-rw-r--r-- 1 peter peter  7 Apr 16 14:47 test-1.txt
+lrwxrwxrwx 1 peter peter 10 Apr 16 14:37 test-3.txt -> test-1.txt
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/hello

+#!/bin/bash
+
+echo "Hello, world!"

20210416/hello.c

+#include <stdio.h>
+
+int main (void)
+{
+  printf ("Hello, world!\n");
+  return 0;
+}

20210416/mount-1.txt

+cassini/home/peter/bo/2021ss/bs/20210416> ls -lh ~/Www/Was\ läuft\ falsch\ in\ der\ gegenwärtigen\ Physik-99hVAu1k6G8.mp4
+-rw-r--r-- 1 peter peter 155M Mai 20  2019 '/home/peter/Www/Was läuft falsch in der gegenwärtigen Physik-99hVAu1k6G8.mp4'
+cassini/home/peter/bo/2021ss/bs/20210416> cp -pi ~/Www/Was\ läuft\ falsch\ in\ der\ gegenwärtigen\ Physik-99hVAu1k6G8.mp4 /media/usb
+usb/  usb0/ usb1/ usb2/ usb3/ usb4/ usb5/ usb6/ usb7/
+cassini/home/peter/bo/2021ss/bs/20210416> cp -pi ~/Www/Was\ läuft\ falsch\ in\ der\ gegenwärtigen\ Physik-99hVAu1k6G8.mp4 /media/usb
+usb/  usb0/ usb1/ usb2/ usb3/ usb4/ usb5/ usb6/ usb7/
+cassini/home/peter/bo/2021ss/bs/20210416> cp -pi ~/Www/Was\ läuft\ falsch\ in\ der\ gegenwärtigen\ Physik-99hVAu1k6G8.mp4 /media/usb3/
+cassini/home/peter/bo/2021ss/bs/20210416> mount | grep usb
+cassini/home/peter/bo/2021ss/bs/20210416> mount /media/usb3/
+cassini/home/peter/bo/2021ss/bs/20210416> ls -l /media/usb3/
+insgesamt 4
+-rwxr-xr-x 1 peter peter 40 Dez  3 10:52  nm.txt
+-rwxr-xr-x 1 peter peter  0 Apr 16 12:52 'Was läuft falsch in der gegenwärtigen Physik-99hVAu1k6G8.mp4'
+cassini/home/peter/bo/2021ss/bs/20210416> cp -pi ~/Www/Was\ läuft\ falsch\ in\ der\ gegenwärtigen\ Physik-99hVAu1k6G8.mp4 /media/usb3/
+cp: '/media/usb3/Was läuft falsch in der gegenwärtigen Physik-99hVAu1k6G8.mp4' überschreiben? y
+cassini/home/peter/bo/2021ss/bs/20210416> umount /media/usb3
+cassini/home/peter/bo/2021ss/bs/20210416> mount /media/usb3
+cassini/home/peter/bo/2021ss/bs/20210416> ls -l /media/usb3/                                   insgesamt 158284
+-rwxr-xr-x 1 peter peter        40 Dez  3 10:52  nm.txt
+-rwxr-xr-x 1 peter peter 162077261 Mai 20  2019 'Was läuft falsch in der gegenwärtigen Physik-99hVAu1k6G8.mp4'
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/shell-scripts-1.txt

+cassini/home/peter/bo/2021ss/bs/20210416> cat cd..
+cd ..
+cassini/home/peter/bo/2021ss/bs/20210416> cd..
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/shell-scripts-2.txt

+cassini/home/peter/bo/2021ss/bs/20210416> cat cd..
+pwd
+cd ..
+pwd
+cassini/home/peter/bo/2021ss/bs/20210416> cd..
+/home/peter/bo/2021ss/bs/20210416
+/home/peter/bo/2021ss/bs
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/shell-scripts-3.txt

+cassini/home/peter/bo/2021ss/bs/20210416> ls -l hello
+-rw-r--r-- 1 peter peter 21 Apr 16 14:24 hello
+cassini/home/peter/bo/2021ss/bs/20210416> cat hello
+echo "Hello, world!"
+cassini/home/peter/bo/2021ss/bs/20210416> chmod 755 hello
+cassini/home/peter/bo/2021ss/bs/20210416> ./hello
+Hello, world!
+cassini/home/peter/bo/2021ss/bs/20210416>

20210416/shell-scripts-4.txt

+cassini/home/peter/bo/2021ss/bs/20210416> cat hello
+#!/bin/bash
+
+echo "Hello, world!"
+cassini/home/peter/bo/2021ss/bs/20210416> ./hello
+Hello, world!
+cassini/home/peter/bo/2021ss/bs/20210416>