Skill _ tips

--------------------------------- Tips --------------------------------

1. tset, reset // initialization terminal: terminal initialization

2. Run 'echo * 'in combination with cd // when the ls command is unavailable, you can view the directory.

3. which ping // view the executable file path

4. l. // view hidden files

5. sync; reboot // write data in the memory to the hard disk before shutdown

6. w // more detailed than the who command

7. finger jacky // display jacky user details

8. umount-l 192.168.0.148:/exprots // uninstall the file system where device is busy

9. fuser-mv/mnt/nfs/c // check which processes are using the mounted file system

9. fuser-mvik/mnt/nfs/c // k: Kill all processes that use the mounted file system. I: Prompt before killing

10. 'mount-o remount, rw/'// re-mount in read/write mode/

11. dmesg | more // view the startup information recorded by the kernel: used for troubleshooting

Dmesg> boot. messages

12. Tail-F/var/log/messages // view the log record information:

13. Free Top // view memory (including swap) Usage

14. pgrep-l-T pts/2 // view the processes running on the specified Terminal

15. pgrep-l-u Jon, Jenny // view processes belonging to the specified user

16. Tar CZF--C/data/MySQL. DB | SSH 192.168.0.23 tar xzvf--C/backup/

17. CHSH-l // list the scripts in/etc/shells. The scripts in this file exist in/bin/or/sbin /.

18. egrep 'vmx | SVM '/proc/cpuinfo // check whether the CPU flag supports KVM virtualization.

19. findfs label = <label> | UUID = <UUID> // find the specified file system and display its device name

--- // Close the process
20. pkill named // pname

Kill [-9] 7873 // PID

21. When resize2fs/dev/vg0/lv0 // enlarge the LV, remember to zoom in the FS later.
// Expand FS [******* otherwise, {New} physical space [unavailable] n *******] not covered by FS in lv0 [unavailable]

22. man 5 passwd/man 1 passwd // [1]: USER command; [5]:


23. grep flags/proc/cpuinfo // check whether the CPU supports [hardware virtualization function]: mvx | svm

24. id // display the SELinux context of the current shell: unconfined_t-> All SELinux policies can be ignored.

25: sysctl // man-8 sysctl: Modify Kernel Parameters

26: who-r // view the running level

27. uname-a/rpm-q kernel // view the kernel version number

28. getent passwd | hosts | shadow |... // view records of a specified type of database.
// Database is one of ahosts, ahostsv4, ahostsv6, aliases, ethers, group, hosts,
// Netgroup, networks, passwd [file], protocols, rpc, services or shadow.