UNIX/Linux/Bash shell, C

"vi has 2 modes. One that beeps at you, and another that ruins everything."

Subdomain	Theme	Link
Theory	Unix-like Operating Systems – Theory	Theory (main) Theory (additional) The Little Book of Semaphores
FMI>Tasks	All tasks included in 2020 FMI longlist	Longlist 2020
FMI>Cheat sheets	Good coders code, great coders reuse	Bash Redirection Cheat Sheets vi Reference Card Makefile
FMI>Project	Image editor	crop [ipoint median_faces rect_faces].sh crop_all.sh

FMI Tasks

N	Subdomain	Task	Solution
131	FMI>C>Processes	Exam 2020-07-12 Task 2	foo.c bar.c
130	FMI>C>Processes	Exam 2020-07-12 Task 1	Examples Solution.c
129	FMI>C>Processes	Additional Task 2.md	Solution.c
128	FMI>C>Processes	Additional Task 1.md	Solution.c
127	FMI>C>Processes	cat a.txt / sort / uniq.c	Solution 1 (long).c Solution 2 (short).c
126	FMI>C>Processes	cat passwd.txt / cut -d ':' -f 7 / sort / uniq.c	Solution.c
125	FMI>C>Processes	Task P03.c	Solution.c
124	FMI>C>Processes	Task P02.c	Solution.c
123	FMI>C>Processes	Task P01.c	Solution 1.c Solution 2.c
121	FMI>C>Processes	Task 13.c	Solution 1.c Solution 2.c
120	FMI>C>Processes	Task 12.c	Solution.c
119	FMI>C>Processes	Task 11.c	Solution.c
118	FMI>C>Processes	Task 10.c	Solution.c
117	FMI>C>Processes	Task 09.c	Solution.c
116	FMI>C>Processes	Task 08.c	Solution 1.c Solution 2(more precise).c
115	FMI>C>Processes	Task 07.c	Solution.c
114	FMI>C>Processes	Task 06.c	Solution.c
113	FMI>C>Processes	Task 05.c	Solution.c
112	FMI>C>Processes	Task 04.c	Solution.c
111	FMI>C>Processes	Task 03.c	Solution.c
110	FMI>C>Processes	Task 02.c	Solution.c
109	FMI>C>Processes	Task 01.c	Solution.c
108	FMI>C>Processes	Task 48	Solution 1.c Solution 2.c test cmd for 2nd sol.sh
107	FMI>C>Processes	Task 47	Solution.c
106	FMI>C>Processes	Task 46	Solution.c
105	FMI>C>Processes	Task 45	Solution.c
104	FMI>C>Processes	Prompt with arguments.md	Solution 1.c Solution 2.c
103	FMI>C>Processes	Task 44	Solution 1.c Solution 2.c
102	FMI>C>Processes	Task 43	Solution.c
101	FMI>C>Processes	classic deadlock example	deadlock.c
100	FMI>C>Processes	fork-loop	fork-loop.c
99	FMI>C>Read/Write	41. sort max 65535 uint16_t elements	Solution 1 (counting sort).c Solution 2 (heapsort).c
98	FMI>C>Read/Write	40. cut	Solution.c
97	FMI>C>Read/Write	39. equivalent to 33	Solution (qsort + merge).c
96	FMI>C>Read/Write	38. tr [OPTION] SET1 [SET2]	Solution 1.c Solution 2 (strchr, strrchr).c Solution 3 (goto).c
95	FMI>C>Read/Write	37. <patch.bin> <f1.bin> <f2.bin>	Solution.c
94	FMI>C>Read/Write	36. cat with args	Solution 1.c Solution 2 (more precise).c
93	FMI>C>Read/Write	35. <f1.bin> <f2.bin> <patch.bin>	Solution 1.c Solution 2.c
92	FMI>C>Read/Write	34. <f1.dat> <f1.idx> <f2.dat> <f2.idx>	Solution 1.c Solution 2.c
91	FMI>C>Read/Write	33. sort big binary file	Solution (qsort + merge).c
90	FMI>C>Read/Write	32. pairs extract from file	Solution 1.c Solution 2.c
89	FMI>C>Read/Write	31. sort file.bin inplace	Solution.c
88	FMI>C>Read/Write	overflow testing with counting sort	Solution.c
87	FMI>C	memory management	struct padding.c
86	FMI>C>Read/Write	11. counting sort	Solution 1 (<file.bin> <sorted.bin>).c Solution 2 (inplace).c
85	FMI>C>Read/Write	10. [--print --min --max] binfile	Solution.c
84	FMI>C>Read/Write	09. passwd with '?' separator	Solution.c
83	FMI>C>Read/Write	08. cp with multiple args	Solution 1.c Solution 2.c Solution 3.c
82	FMI>C>Read/Write	07. cat with multiple args	Solution.c
81	FMI>C>Read/Write	06. cp with 2 args	Solution.c
80	FMI>C>Read/Write	05. sort binary file	Solution.c
79	FMI>C>Read/Write	04. wc	Solution.c
78	FMI>C>Read/Write	03. head without options	Solution.c
77	FMI>C>Read/Write	02. swap files	Solution 1 (read and write).c Solution 2 (renameat2).c
76	FMI>C>Read/Write	01. append	Solution 1 (O_APPEND).c Solution 2 (lseek).c
75	FMI>C>Read/Write	paste with 2 files.md	Solution.c
74	FMI>Scripts	Longet Filename Search	Solution.sh
73	FMI>Scripts	./chfext	Solution.sh
72	FMI>Scripts	Task 29	Solution.sh
71	FMI>Scripts	Task 28	Solution (A) cycle.sh Solution 1 (B) extract last digit.sh Solution 2 (B) smart sed + bc.sh
70	FMI>Scripts	Task 27	Solution 1 (sorted).sh Solution 2 (input order).sh
69	FMI>Scripts	Task 26	Solution.sh
68	FMI>Scripts	Task 25	Solution.sh
67	FMI>Scripts	Task 23	Solution 1 (sort -V).sh Solution 2 (multiple fields sort).sh
66	FMI>Scripts	Task 24	Solution.sh
65	FMI>Scripts	Task 22	Solution.sh
64	FMI>Scripts	Task 21	Solution.sh
63	FMI>Scripts	Task 20	Solution.sh
62	FMI>Scripts	Task 19	Solution.sh
61	FMI>Scripts	Task 18	Solution.sh
60	FMI>Scripts	Task 17	Solution.sh
59	FMI>Scripts	Task 16	Solution 1.sh Solution 2.sh
58	FMI>Scripts	Task 15	Solution.sh
57	FMI>Scripts	Task 14	Solution.sh
56	FMI>Scripts	Task 13	Solution 1.sh Solution 2.sh
55	FMI>Shell	05-b-9600	Solution.sh
54	FMI>Shell	05-b-9501	Solution.sh
53	FMI>Shell	05-b-9200	Solution.sh
52	FMI>Shell	05-b-9100	Solution.sh
51	FMI>Shell	05-b-8000	Solution.sh
50	FMI>Shell	05-b-7800	Solution.sh
49	FMI>Shell	05-b-7700	Solution 1 (awk -v).sh Solution 2 (-size).sh
48	FMI>Shell	05-b-7550	Solution 1 (one by one - polite).sh Solution 2 (all at once).sh
47	FMI>Shell	05-b-7500	Solution.sh
46	FMI>Shell	05-b-7200	Solution 1 (find by -size).sh Solution 2 (awk -v).sh
45	FMI>Shell	05-b-7100	Solution.sh
44	FMI>Shell	05-b-7000	Solution.sh
43	FMI>Shell	05-b-6800	Solution.sh
42	FMI>Shell	05-b-6600	Solution 1 (pipe).sh Solution 2 (process substitution).sh
41	FMI>Shell	05-b-5500	Solution.sh
40	FMI>Shell	05-b-4800	Solution.sh
39	FMI>Shell	05-b-4700	Solution 1 (for loop).sh Solution 2 (xargs).sh Solution 3 (sed).sh
38	FMI>Shell	05-b-4600	Solution.sh
37	FMI>Shell	05-b-4400	Solution.sh
36	FMI>Shell	05-b-4301	Solution.sh
35	FMI>Shell	05-b-4300	Solution.sh
34	FMI>Shell	05-b-4200	Solution 1.sh Solution 2.sh Solution 3.sh
33	FMI>Shell	05-b-3400	Solution.sh
32	FMI>Shell	05-b-3300	Solution.sh
31	FMI>Shell	05-b-3200	Solution 1.sh Solution 2.sh
30	FMI>Shell	05-b-3100	Solution.sh
29	FMI>Shell	05-b-2800	Solution 1 (bashism).sh Solution 2 (pipe).sh Solution 3 (process substitution).sh
28	FMI>Shell	05-b-2000	Solution.sh
27	FMI>Shell	04-b-9000	Solution 1.sh Solution 2.sh
26	FMI>Processes	04-b-8000	Solution.sh
25	FMI>Processes	04-b-7000	Solution.sh
24	FMI>Processes	04-a-6300	Solution.sh
23	FMI>Processes	04-b-6200	Solution.sh
22	FMI>Processes	04-b-6100	Solution.sh
21	FMI>Processes	04-a-6000	Solution.sh
20	FMI>Processes	04-b-5000	Solution.sh
19	FMI>Processes	04-a-5000	Solution.sh
18	FMI>Shell	Draw Pyramid	Solution.sh
17	FMI>File Processing	E 12	Solution.sh
16	FMI>Text Processing	E 11	Solution.sh
15	FMI>Text Processing	E 10	Solution.sh
14	FMI>File Processing	E 09	Solution.sh
13	FMI>File Processing	E 08	Solution.sh
12	FMI>Text Processing	E 07	Solution.sh
11	FMI>File Processing	E 06	Solution.sh
10	FMI>File Processing	E 05	Solution.sh
9	FMI>Text Processing	E 04	Solution.sh
8	FMI>Text Processing	E 02	Solution.sh
7	FMI>Text Processing	E 01	Solution.sh
6	FMI>Text Processing	T_02	Solution.sh
5	FMI>Text Processing	T 01	Solution.sh
4	FMI>Text Processing	03-b-7500	Solution.sh
3	FMI>Text Processing	T_06	Solution.sh
2	FMI>Text Processing	T_05	Solution.sh
1	FMI>Text Processing	T_04	Solution.sh

Warm up with Hackerrank

N	Subdomain	Challenge	Points	Solution
64	Text Processing	Sort Command #1	1	Solution.sh
63	Text Processing	Sort Command #2	1	Solution.sh
62	Text Processing	Sort Command #3	1	Solution.sh
61	Text Processing	Sort Command #4	1	Solution 1.sh Solution 2.sh
60	Text Processing	Sort Command #5	1	Solution.sh
59	Text Processing	Sort Command #6	1	Solution.sh
58	Text Processing	Sort Command #7	1	Solution.sh
57	Text Processing	'Uniq' Command #1	1	Solution.sh
56	Text Processing	'Uniq' Command #2	1	Solution 1.sh Solution 2.sh
55	Text Processing	'Uniq' Command #3	1	Solution 1.sh Solution 2.sh
54	Text Processing	'Uniq' Command #4	1	Solution 1.sh
53	Text Processing	'Grep' A	2	Solution 1.sh Solution 2.sh
52	Text Processing	'Grep' B	2	Solution 1.sh Solution 2.sh
51	Text Processing	'Grep' #1	2	Solution 1.sh Solution 2.sh
50	Text Processing	'Grep' #2	2	Solution.sh
49	Text Processing	'Grep' #3	2	Solution.sh
48	Text Processing	'Sed' Command #1	2	Solution 1.sh Solution 2.sh
47	Text Processing	'Sed' Command #2	2	Solution.sh
46	Text Processing	'Sed' Command #3	2	Solution 1.sh Solution 2.sh
45	Text Processing	'Sed' Command #4	2	Solution 1.sh Solution 2.sh
44	Text Processing	'Sed' Command #5	2	Solution 1.sh Solution 2.sh
43	Text Processing	'Awk' #1	2	Solution 1.sh Solution 2.sh
42	Text Processing	'Awk' #2	2	Solution 1.sh Solution 2.sh
41	Text Processing	'Awk' #3	2	Solution 1.sh Solution 2.sh
40	Text Processing	'Awk' #4	2	Solution 1.sh Solution 2.sh
39	Text Processing	Cut #1	1	Solution.sh
38	Text Processing	Cut #2	1	Solution.sh
37	Text Processiing	Cut #3	1	Solution.sh
36	Text Processing	Cut #4	1	Solution 1.sh Solution 2.sh
35	Text Processing	Cut #5	1	Solution 1.sh Solution 2.sh
34	Text Processing	Cut #6	1	Solution.sh
33	Text Processing	Cut #7	1	Solution.sh
32	Text Processing	Cut #8	1	Solution.sh
31	Text Processing	Cut #9	1	Solution.sh
30	Text Processing	Paste #1	2	Solution.sh
29	Text Processing	Paste #2	2	Solution.sh
28	Text Processing	Paste #3	2	Solution.sh
27	Text Processing	Paste #4	2	Solution 1.sh Solution 2.sh
26	Text Processing	Head of a Text File #1	2	Solution.sh
25	Text Processing	Head of a Text File #2	1	Solution.sh
24	Text Processing	Tail of a Text File #1	2	Solution.sh
23	Text Processing	Tail of a Text File #2	2	Solution.sh
22	Text Processing	Middle of a Text File	3	Solution 1.sh Solution 2.sh Solution 3.sh
21	Text Processing	'Tr' Command #1	1	Solution 1.sh Solution 2.sh
20	Text Processing	'Tr' Command #2	1	Solution.sh
19	Text Processing	'Tr' Command #3	1	Solution 1.sh Solution 2.sh Solution 3.sh Solution 4.sh
18	Bash	Let's Echo	1	Solution.sh
17	Bash	A Personalized Echo	1	Solution.sh
16	Bash	Looping with Numbers	2	Solution 1.sh Solution 2.sh Solution 3.sh Solution 4.sh
15	Bash	The World of Numbers	2	Solution 1.sh Solution 2.sh
14	Bash	Looping and Skipping	2	Solution 1.sh Solution 2.sh Solution 3.sh Solution 4.sh
13	Bash	Comparing Numbers	3	Solution 1.sh Solution 2.sh
12	Bash	Getting started with conditionals	3	Solution 1.sh Solution 2.sh
11	Bash	More on Conditionals	3	Solution.sh
10	Bash	Arithmetic Operations	3	Solution.sh
9	Bash	Compute the Average	4	Solution.sh
8	Arrays in Bash	Filter an Array with Patterns	1	Solution 1.sh Solution 2.sh
7	Arrays in Bash	Read in an Array	1	Solution 1.sh Solution 2.sh
6	Arrays in Bash	Slice an Array	1	Solution 1.sh Solution 2.sh
5	Arrays in Bash	Concatenate an array with itself	1	Solution.sh
4	Arrays in Bash	Display an element of an array	1	Solution.sh
3	Arrays in Bash	Count the number of elements in an Array	1	Solution.sh
2	Arrays in Bash	Remove the First Capital Letter from Each Element	1	Solution 1.sh Solution 2.sh Solution 3.sh Solution 4.sh
1	Arrays in Bash	Lonely Integer - Bash!	10	Solution 1.sh Solution 2.sh