https://github.com/nathancordeiro/operating-systems
These are all the codes for the third year course of operating systems.
https://github.com/nathancordeiro/operating-systems
Last synced: 6 months ago
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These are all the codes for the third year course of operating systems.
- Host: GitHub
- URL: https://github.com/nathancordeiro/operating-systems
- Owner: NathanCordeiro
- Created: 2024-08-29T15:36:01.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2025-01-10T15:49:27.000Z (9 months ago)
- Last Synced: 2025-02-07T00:20:16.487Z (8 months ago)
- Language: C++
- Size: 80.1 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
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README
# Operating-Systems
---
These are all the codes for the third year course of operating systems.
These include shell programs and operating system algorithms.
## Table Of Contents
```txt
1. linux commands
2. Shell Script Programs
3. Preamptive Scheduling Algorithms
4. Non Premptive Scheduling Algorithms
5. Deadlock Detection Algorithms
6. Producer Consumer Rule
7. Paging Algorithms
8. Dynamic Allocation Algorithms
9. Disk Scheduling Algorithms
```
## Notes on bash shell scripting
Open a text file and save the file with a `.sh` extension
```sh
filrname.sh
```
Add Shebang/Hash-bang to the script
Shebang is the entry it tells the kernel to use bash as the script not the default script which might not be bash.
```sh
#!/bin/bash
# write some code here
```
## Tips for faster and more efficient bash scripting
- Remenber bash is sensitive to white spaces
- Use regular expression for arithmetic operations rather than `expr`
```sh
a=$((b + c))
x=$((y * z))
```
```sh
$a = expr `$a + $b`
$x = expr `$y \* $z`
```
- We can auto increment and decrement using regular expression (both formats are different and work diffrently)
```sh
((++i))
$((++i))
```
- To use regular expression we use the (( )) brackets now we can use this in `loops` and `if` statements
- Use Python for loops
```sh
for i in {1..10};do
done
```
- Bash allows UNIX commands so use them whenever possible to make scripts easier and faster to execute