Linux Command notes

1. Use CAT/proc/devices to view the primary device ID corresponding to the currently used device.

CAT/proc/interrupts view records the interrupt number that the device is using

CAT/proc/tty/drivers can view information about all tty devices in the current system

Arm-Linux-gcc-V

2. Switch command from user to super user on the Control Platform: su-Root

 

3. Add the bin directory to the environment variable:

Export Path =/usr/local/ARM/bin: $ path

Environment variables added using this method will be lost after power loss. Therefore, you can add the above command in the last line of "/etc/bashrc.

Run echo $ path to view the environment.

 

4. mount command

Mkdir/mnt/Windows

If the format is vfat, run the Mount-T vfat/dev/hand1/mnt/Windows Command to mount the partition to Windows.

 

5. view the default running level of the system: CAT/etc/inittab

View the auto-start service after the system is started: chkconfig -- list

Stop ** service: Service ** stop (Service ** stop | start)

Set ** service to not start: chkconfig -- level n ** stop

View the list of all services and their port numbers in the system: CAT/etc/services

Change ** service port ?? : VI/etc/services, enter the insert mode, find the corresponding ** service, and change its port number ??

 

6. pop up the CD

Eject

 

7. How can I change the IP address, gateway, and DNS of a Linux Nic through the command line?

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Set routing and mask

# Route add-net default GW 192.168.0.254 netmask 255.255.255.0

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Nic eth0 IP address changed to 102.160.1

Ifconfig eth0 102.160.1 netmask 255.255.255.0

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Change gateway to 102.160.254

Route add default GW 102.160.254

You can also modify it in the startup file.

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Modify DNS

Echo "nameserver 202.202.202.20">/etc/resolv. conf

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Restart NETWORK SERVICE

/Etc/rc. d/init. d/network restrart

 

Command

# Open the Ethernet Interface

Ifconfig eth0 up/down/Restart service network up/down/restart

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Attach Optical Drive

1. Create a cdrom directory under the MNT directory

CD/mnt

Mkdir CDROM

2. Mount the optical drive

Mount-T iso9660/dev/CDROM/mnt/CDROM

3. Uninstall the optical drive

Umount/mnt/CDROM
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8. Connection command. Example:

The most common method is to create a link pointing to busybox. Different link names are used to complete different functions.

# Ln-s busybox ls

# Ln-s busybox RM

# Ln-s busybox mkdir