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adds small word finding exercise

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waldek 2022-05-10 10:09:46 +02:00
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assets/find_words_in_here.txt Normal file
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essential/introduction_to_the_commandline.md
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@ -1122,6 +1122,21 @@ All of these conditions can be combined to improve the specificity of your query
There are a few exercises below so I won't give too many spoiler.
My best advise is to read `man find` and experiment.
# Exercise
Inside a clean minimal installation can you please:
* find all files that are 3286 bytes
* find all files not owned by `root` **and** `$USER` (yourself)
* find all symbolic links
* find all files that contain *ssh* in the filename **and** are smaller that 10 bytes
For the eager ones:
* find all files in `/usr` that contain the word *hippo*
* find all files in `/usr` that contain the word *hippop* or *hiphop*
* find all Belgian email addresses in `/usr`
## Searching inside files
`locate` and `find` are used to search **for** files.
@ -1170,7 +1185,7 @@ waldek@debian:~$ locate american
/var/lib/ispell/american.remove
```
We can use `grep` to find all occurrences of the word *hippo* with the following syntax.
We can use `grep` to find all occurrences of the word *hippop* with the following syntax.
```
waldek@debian:~$ grep "hippop" /usr/share/dict/american-english
@ -1260,19 +1275,12 @@ waldek@helloworld:~$ ls [6-9][0-3][ab]?x*
waldek@helloworld:~$
```
# Exercise
Inside a clean minimal installation can you please:
* find all files that are 3286 bytes
* find all files not owned by `root` **and** `$USER` (yourself)
* find all symbolic links
* find all files that contain *ssh* in the filename **and** are smaller that 10 bytes
* find all files in `/usr` that contain the word *hippo*
* find all files in `/usr` that contain the word *hippop* or *hiphop*
* find all Belgian email addresses in `/usr`
I hid a lot of words in [this](../assets/find_words_in_here.txt) file.
How many can you find?
What do they all have in common?
Can you count the occurences?
* [exercise from Linux long](https://gitea.86thumbs.net/waldek/linux_course_doc/src/branch/master/modules/qualifying/learning_regex.md)