ssh user@host
scp user@host:file1 file2
scp file1 user@host:file2
sftp user@host
ssh-keygen -t rsa
poweroff
reboot
shutdown -r +15 'The system will be rebooted !!'
alias vi='/usr/bin/vim'
which vi
man
ls --help
man ls | col -b > lshelp.txt
find /etc/ -name 'ifcfg*'
pwd
du -sh /home
mkdir -p /a/b/c
ls -R /a
touch test.py
ln -s /etc/httpd/conf/httpd.conf /etc/httpd.conf
ln /user/sin/system-config-network /sbin/netconfig
cp -rf
cp -pi
wc /etc/hosts
grep '^#'
tar -zcvf test.tar.gz test
tar -zxvf test.tar.gz
tar -jcvf temp.tar.bz2 temp
tar -jxvf temp.tar.bz2
gzip -9 test
gzip -d test.gz
bzip2 -9 temp
bzip2 -d temp.bz2
ifconfig eth0
route -n
netstat -antp | grep :21
netstat -autp
traceroute 192.168.7.7
nslookup www.google.com
route add default gw 192.168.116.2
route del default gw 192.168.116.2
ifconfig ens33 up
ifconfig ens33 down
ifconfig ens33 192.168.116.111 netmask 255.255.255.0
ifconfig ens33 192.168.116.111/24
ifdown eth0
ifup eth0
fdisk -l
fdisk /dev/sdb
mkfs -t ext4 /dev/sdb1
mkswap /dev/sdb5
swapon /dev/sdb5
swapoff /dev/sdb5
mount /dev/sdb1 /mnt1
umount /dev/sdb1
umount mnt1
mount -t iso9660 /dev/cdrom /media/cdrom
df -hT
md5sum axel-1.0a.tar.gz
gcc --version
./configure --help
./configure --prefix=/usr/local/apache
make
make clean
make install
rpm -qa | grep bash
rpm -qi dhcp
rpm -ql httpd
rpm -qc vsftpd
rpm -qd mysqld
rpm -qf /etc/*.config
rpm -qpi ethtool-6-4.el5.i386.rpm
rpm -qpl ethtool-6-4.el5.i386.rpm
rpm -qpc
rpm -qpd
rpm -i
rpm -e
rpm -U
rpm -F
rpm --force
rpm --nodeps
yum clean all
yum list httpd
yum info httpd
yum search "vsftpd"
yum grouplist "Desktop"
yum groupinfo "X Window System"
yum -y install
yum groupinstall
yum update
yum -y groupinstall
yum remove
yum groupremove
systemctl list-units
systemctl enable httpd
systemctl disable httpd
systemctl status httpd.service
systemctl list-units --type=service
systemctl start httpd
systemctl stop httpd
systemctl restart httpd
systemctl list-unit-files --type=service
runlevel
init 3
init 6
at
crontab
ps -aux
ps -elf
top
pstree -aup
pstree -ap teacher
jobs
fg
pgrep -l "portmap"
kill -9 2869
killall -9 vim
date
at 14:55 2024-02-21
atq
atrm 2
crontab -e
crontab -e -u jerry
crontab -l -u jerry
crontab -r -u jerry
groupadd user_group
useradd -g user_group -d /user1 user1
useradd -g user_group -d /home/user2 user2
passwd user1
logout
mkdir share
chown -R root:user_group share
chmod -R 774 share
ping 8.8.8.8
systemctl stop firewalld
setenforce 0