Course overview and the shell

# Course overview + the shell

date
echo hello
echo "Hello world"
echo $PATH

which echo
pwd(present working directory)

cd /home
cd .
cd ..
cd ~
cd -


ls
ls ..
ls --help
ls -l

# 权限控制
r--read
w--write
x--execute

# 移动/重命名
mv dotefiles.md foo.md

cp dotfiles.md foo.md

rm ../food.md

mkdir photos
rmdir photos

man ls
ctrl+L

# input streams 
# output streams

echo hello > hello.txt
cat hello.txt
cat < hello.txt

cat < hello.txt > hello2.txt
cat < hello.txt >> hello2.txt

ls -l / | tail n1

curl --head --silent google.com | grep -i content-length | cut --delimiter=' ' -f2

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shell 通过环境变量来找程序

# 参考资料

https://missing.csail.mit.edu/
https://missing-semester-cn.github.io/
https://www.bilibili.com/video/BV14E411J7n2
https://www.youtube.com/watch?v=&list=PLyzOVJj3bHQuloKGG59rS43e29ro7I57J
https://missing-semester-cn.github.io/2020/course-shell/

上次更新: 2021/08/17, 18:07:06

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