1、實(shí)驗(yàn)-輸出重定向

echo uos > test
cat test
echo bing > test
cat test
echo txuos >> test
cat test

2、實(shí)驗(yàn)-錯(cuò)誤重定向

wadwadwad 2> test
cat test

3、實(shí)驗(yàn)-雙重輸出重定向

find / -user uos > test
cat test
find / -name passwd 2> test
cat test
find / -name passwd &> test
cat test

find / -name passwd > test 2>&1
cat test

４、實(shí)驗(yàn)-輸入重定向

mail uos < test
su - uos
mail

cat > ok << EOF
123
456
EOF
cat ok

５、實(shí)驗(yàn)-管道

cat /etc/passwd | grep root
cat /etc/passwd | grep ^root
cat /boot/grub2/grub.cfg | grep -v ^# | grep -v ^$ > newgrub
cat /boot/grub2/grub.cfg | tee file1 | grep -v ^# | tee file2 | grep -v ^$ | tee file3 > newgrub

6、實(shí)驗(yàn)-文件操作命令

head /etc/passwd
head -n 5 /etc/passwd
tail /etc/passwd
tail -n 5 /etc/passwd
tail -f /var/log/message
wc -l /etc/passwd
sort -rnk 3 -t : /etc/passwd
uniq -c qintest
uniq -c qintest | sort
sort qintest | uniq -c
df -Th | grep sda2 | tr -s " " | cut -d " " -f 6 | cut -d "%" -f 1
paste file1 file2 file3