Common commands in ubuntu linux

1. All permissions for folders and subfolders: chmod-R777test, generally 755 is enough
2. Folder name
Go to the folder to copy all files to the destination folder: rsync-Cavz * brantx@abc.com:/var/www/jtbc/img
Scp-r * brantx@abc.com:/var/www

3. modify the system time:

Method 1:
Date010318242008 (month, day, and year)
Date010318242008.30 (YYYY. Sec)

Method 2: set the date first
Date-s20080103
2. Set the time
Date-s18: 24: 00,
If you want to change the BIOS time at the same time
Run again
Clock-w

4. Search for files containing text
Find./-typef-name "*. php"-execgrep-l "58.211.115.53" {}\;>/file_list.txt

5, tar packaging and compression: tar-zcvftest.tar.gztest, decompression: tar-zxvftest.tar.gztest/
6, *. gz decompression: gzip-dtest.gz
7. view the folder size: du-shtest
8. mount a hard disk or USB flash disk device: first, go to the/dev directory to find the files named sda1 and sdb1, indicating that the hardware has been loaded, and then mount the device: mount/dev/sda1/mnt
9. log on to other linux servers: ssheteet@eteet.com
10. mysql in linux:
A. login mysql: mysql-uroot-p (local login); mysql-h192.168.0. ***-uroot-p (login to other machines)
B. Back up a mysql database and compress the name by Time: mysqldumpbtoss-uroot-p114114 | gzip>/backup/btoss-((datepolicpolicpolicypolicm1_d1_.gz
C. view the database: showdatabases;
D. Use a database: usebtoss;
E. View All Tables: showtables;
F. view the table structure: desctablename;
E. Modify the root user password: mysqladmin-uroot-ppasswordasdfjkl;
11. find the file by time./-mtime-1 | more;-1 represents a few days,./Represents the Directory
Eg. find./-ctime-1-execcp {}/bak \; indicates to find the file from the previous day in the current directory and copy it to the bak directory. Note the format semicolon)
12. Add a virtual IP Address: ifconfigeth0: 0172.16.7.100netmask?255.255.255broadcast172.16.7.100 to an Eni.
Add two virtual IP addresses: ifconfigeth1: 0172.16.7.101netmask1_255.255.255broadcast172.16.7.101
Delete the added virtual IP Address: ifconfigeth0: 0del172. 16.7.100
13. ipvsadm application:
A. Deletion record: ipvsadm-d-t172.16.7.207: 80-r172.16.7.209: 80
14. Add User in linux: adduserjoe, password change: passwdjoe, delete user: userdel-fjoe
15. system update time: ntpdatentp.ubuntu.com
16. Extract rar files: apt-getinstallunrar,raretest.rar
17. Batch delete files of a specified size in a directory find.-name '*'-typef-size1024 | xargs-n1rm-f
18. Use the vi editor to replace all the words "asdf" in the file with "AACC": s/asdf/AACC/g.
19. iptables configuration instance reference: http://www.linux.gov.cn/netweb/iptables.htm#iptablesexample
20. Use wireshark to open the tcpdump-ieth0-s0-wtcp.cap for packet capture in linux
21. view the real-time network speed. Look at the downlink: nload-uH, and see a NIC: iptraf-g.
22. Hard Disk Partitioning in linux: fdisk/dev/sdb
Prompt all help by m
Display the current partition by p
Delete the current partition by d. You may need to select the ID of the current partition.
Press n to create a new partition. The following message is displayed: Primary p, e extension. Select primary Partition Number 1-4. The default value is 1. Start next to select the boiling surface size. The default value is 1.
Save by w
23. format it to Ext3: mkfs. ext3/dev/sdb1
24. Enable automatic mounting of the hard disk: Modify/etc/fstab to add/dev/sdb1/dataext4errors = remount-ro01

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