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mediun level Linux commands on netstat, SCP, ＞＞, SSH, etc
作者：Li_阴宅 | 2024-08-16 09:25:07
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mediun level Linux commands on netstat, SCP, ＞＞, SSH, etc
medium level Linux commands
1) SSH & netstat
C:\Users\51638>ssh -p 22 root@8.137.109.109 Welcome to Alibaba Cloud Elastic Compute Service ! Updates Information Summary: available 50 Security notice(s) 12 Important Security notice(s) 30 Moderate Security notice(s) 8 Low Security notice(s) Run "dnf upgrade-minimal --security" to apply all updates.More details please refer to: https://help.aliyun.com/document_detail/416274.html Last login: Wed Aug 14 14:04:06 2024 from 36.113.32.98 [root@iZ2vc5lqzt23aweti4j777Z ~]# netstat -tuln Active Internet connections (only servers) Proto Recv-Q Send-Q Local Address Foreign Address State tcp 0 0 0.0.0.0:5355 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:20048 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:38833 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:56379 0.0.0.0:* LISTEN tcp 0 0 0.0.0.0:2049 0.0.0.0:* LISTEN tcp 0 0 127.0.0.1:42915 0.0.0.0:* LISTEN tcp6 0 0 :::5355 :::* LISTEN tcp6 0 0 :::111 :::* LISTEN tcp6 0 0 :::20048 :::* LISTEN tcp6 0 0 :::46519 :::* LISTEN tcp6 0 0 :::2049 :::* LISTEN tcp6 0 0 :::58695 :::* LISTEN udp 0 0 127.0.0.1:323 0.0.0.0:* udp 0 0 0.0.0.0:20048 0.0.0.0:* udp 0 0 127.0.0.1:659 0.0.0.0:* udp 0 0 0.0.0.0:57220 0.0.0.0:* udp 0 0 127.0.0.53:53 0.0.0.0:* udp 0 0 0.0.0.0:111 0.0.0.0:* udp 0 0 0.0.0.0:44156 0.0.0.0:* udp 0 0 0.0.0.0:5355 0.0.0.0:* udp6 0 0 ::1:323 :::* udp6 0 0 :::20048 :::* udp6 0 0 :::46721 :::* udp6 0 0 :::111 :::* udp6 0 0 :::44225 :::* udp6 0 0 :::5355 :::* [root@iZ2vc5lqzt23aweti4j777Z ~]# netstat -tuln | grep :22 tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN [root@iZ2vc5lqzt23aweti4j777Z ~]# ss -tuln | grep :22 tcp LISTEN 0 128 0.0.0.0:22 0.0.0.0:* [root@iZ2vc5lqzt23aweti4j777Z ~]# ss -tuln | grep "22" udp UNCONN 0 0 0.0.0.0:57220 0.0.0.0:* udp UNCONN 0 0 [::]:44225 [::]:* tcp LISTEN 0 128 0.0.0.0:22 0.0.0.0:* [root@iZ2vc5lqzt23aweti4j777Z ~]# ss -tuln | grep 22" > > ; > ^C [root@iZ2vc5lqzt23aweti4j777Z ~]# ss -tuln | grep 22 udp UNCONN 0 0 0.0.0.0:57220 0.0.0.0:* udp UNCONN 0 0 [::]:44225 [::]:* tcp LISTEN 0 128 0.0.0.0:22 0.0.0.0:* [root@iZ2vc5lqzt23aweti4j777Z ~]# ss -tuln | grep "8080" [root@iZ2vc5lqzt23aweti4j777Z ~]# ss -tuln | grep "80" [root@iZ2vc5lqzt23aweti4j777Z ~]# ss -tuln | grep "2049" tcp LISTEN 0 64 0.0.0.0:2049 0.0.0.0:* tcp LISTEN 0 64 [::]:2049 [::]:* [root@iZ2vc5lqzt23aweti4j777Z ~]# ls -al total 68 dr-xr-x---. 7 root root 4096 Aug 14 15:06 . dr-xr-xr-x. 18 root root 4096 Aug 12 15:59 .. -rw------- 1 root root 1449 Aug 14 15:09 .bash_history -rw-r--r--. 1 root root 18 May 18 2020 .bash_logout -rw-r--r--. 1 root root 176 May 18 2020 .bash_profile -rw-r--r--. 1 root root 176 May 18 2020 .bashrc drwxr-xr-x 3 root root 4096 Aug 14 12:08 .cache drwx------ 3 root root 4096 Oct 11 2023 .config -rw-r--r--. 1 root root 100 May 18 2020 .cshrc -rw-r--r-- 1 root root 569 Aug 14 13:20 id_rsa.pub drwxr-xr-x 2 root root 4096 Oct 11 2023 .pip -rw-r--r-- 1 root root 206 Aug 12 15:59 .pydistutils.cfg drwx------ 3 root root 4096 Aug 14 15:06 .ssh -rw-r--r--. 1 root root 129 May 18 2020 .tcshrc -rw------- 1 root root 796 Aug 14 15:06 .viminfo drwxr-xr-x 5 root root 4096 Aug 14 13:30 .vscode-server -rw-r--r-- 1 root root 183 Aug 14 12:08 .wget-hsts [root@iZ2vc5lqzt23aweti4j777Z ~]# pwd /root [root@iZ2vc5lqzt23aweti4j777Z ~]# ls -al total 68 dr-xr-x---. 7 root root 4096 Aug 14 15:06 . dr-xr-xr-x. 18 root root 4096 Aug 12 15:59 .. -rw------- 1 root root 1449 Aug 14 15:09 .bash_history -rw-r--r--. 1 root root 18 May 18 2020 .bash_logout -rw-r--r--. 1 root root 176 May 18 2020 .bash_profile -rw-r--r--. 1 root root 176 May 18 2020 .bashrc drwxr-xr-x 3 root root 4096 Aug 14 12:08 .cache drwx------ 3 root root 4096 Oct 11 2023 .config -rw-r--r--. 1 root root 100 May 18 2020 .cshrc -rw-r--r-- 1 root root 569 Aug 14 13:20 id_rsa.pub drwxr-xr-x 2 root root 4096 Oct 11 2023 .pip -rw-r--r-- 1 root root 206 Aug 12 15:59 .pydistutils.cfg drwx------ 3 root root 4096 Aug 14 15:06 .ssh -rw-r--r--. 1 root root 129 May 18 2020 .tcshrc -rw------- 1 root root 796 Aug 14 15:06 .viminfo drwxr-xr-x 5 root root 4096 Aug 14 13:30 .vscode-server -rw-r--r-- 1 root root 183 Aug 14 12:08 .wget-hsts [root@iZ2vc5lqzt23aweti4j777Z ~]# cd .ssh/ [root@iZ2vc5lqzt23aweti4j777Z .ssh]# ls 14thAug2024 14thAug2024.txt authorized_keys [root@iZ2vc5lqzt23aweti4j777Z .ssh]# [root@iZ2vc5lqzt23aweti4j777Z .ssh]# pwd /root/.ssh [root@iZ2vc5lqzt23aweti4j777Z .ssh]# ls -al total 24 drwx------ 3 root root 4096 Aug 14 15:26 . dr-xr-x---. 7 root root 4096 Aug 14 15:06 .. drwxr-xr-x 2 root root 4096 Aug 14 15:04 14thAug2024 -rw-r--r-- 1 root root 15 Aug 14 15:06 14thAug2024.txt -rw------- 1 root root 569 Aug 14 13:27 authorized_keys -rw-r--r-- 1 root root 17 Aug 14 15:26 test1.txt [root@iZ2vc5lqzt23aweti4j777Z .ssh]# cat test1.txt content for test1[root@iZ2vc5lqzt23aweti4j777Z .ssh]# vim test1.txt [root@iZ2vc5lqzt23aweti4j777Z .ssh]# ls 14thAug2024 14thAug2024.txt authorized_keys test1.txt [root@iZ2vc5lqzt23aweti4j777Z .ssh]# ls 14thAug2024 14thAug2024.txt authorized_keys test1 test1.txt [root@iZ2vc5lqzt23aweti4j777Z .ssh]# cat test1/test1.txt content for test1[root@iZ2vc5lqzt23aweti4j777Z .ssh]# cd test1/ [root@iZ2vc5lqzt23aweti4j777Z test1]# ls -al total 12 drwxr-xr-x 2 root root 4096 Aug 14 15:45 . drwx------ 4 root root 4096 Aug 14 15:45 .. -rw-r--r-- 1 root root 17 Aug 14 15:45 test1.txt [root@iZ2vc5lqzt23aweti4j777Z test1]# cat test1.txt [root@iZ2vc5lqzt23aweti4j777Z test1]#
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2) SCP & SCP -r,
PS C:\Users\51638> ls Directory: C:\Users\51638 Mode LastWriteTime Length Name ---- ------------- ------ ---- d----- 6/27/2024 7:15 PM .codeium d----- 8/9/2024 10:59 AM .minikube da---- 8/14/2024 3:17 PM .ssh d----- 5/17/2024 8:09 PM .vscode d-r--- 5/17/2024 5:36 PM Contacts d-r--- 8/14/2024 9:43 AM Desktop d-r--- 7/18/2024 3:38 PM Documents dar--- 8/14/2024 10:00 AM Downloads d-r--- 5/17/2024 5:36 PM Favorites d-r--- 5/17/2024 5:36 PM Links d-r--- 5/18/2024 11:11 AM Music dar--l 6/22/2024 6:29 PM OneDrive d-r--- 6/20/2024 5:34 PM Pictures d----- 6/5/2024 3:46 PM Postman d-r--- 5/17/2024 5:36 PM Saved Games d-r--- 7/18/2024 3:39 PM Searches d-r--- 8/3/2024 1:50 PM Videos d----- 8/2/2024 3:53 PM WeChatProjects -a---- 6/17/2024 10:21 AM 5 .bash_history -a---- 7/1/2024 8:15 AM 104 .gitconfig -a---- 8/1/2024 1:28 PM 20 .lesshst -a---- 6/16/2024 9:08 AM 297 2024-06-16-01-08-02.023-ABoxHeadless.exe-18672.log -a---- 5/18/2024 12:01 PM 17521 alter PS C:\Users\51638> cd .\.ssh\ PS C:\Users\51638\.ssh> scp .\test1.txt root@8.137.109.109:/root/.ssh test1.txt 100% 17 0.1KB/s 00:00 PS C:\Users\51638\.ssh> ls Directory: C:\Users\51638\.ssh Mode LastWriteTime Length Name ---- ------------- ------ ---- -a---- 8/14/2024 11:25 AM 154 config -a---- 8/14/2024 12:23 PM 3381 debian_rsa -a---- 8/14/2024 12:23 PM 741 debian_rsa.pub -a---- 5/18/2024 9:42 AM 2602 id_rsa -a---- 5/18/2024 9:42 AM 569 id_rsa.pub -a---- 8/14/2024 12:08 PM 932 known_hosts -a---- 8/14/2024 12:07 PM 188 known_hosts.old -a---- 8/14/2024 3:18 PM 17 test1.txt PS C:\Users\51638\.ssh> mkdir test1 Directory: C:\Users\51638\.ssh Mode LastWriteTime Length Name ---- ------------- ------ ---- d----- 8/14/2024 3:44 PM test1 PS C:\Users\51638\.ssh> ls Directory: C:\Users\51638\.ssh Mode LastWriteTime Length Name ---- ------------- ------ ---- d----- 8/14/2024 3:44 PM test1 -a---- 8/14/2024 11:25 AM 154 config -a---- 8/14/2024 12:23 PM 3381 debian_rsa -a---- 8/14/2024 12:23 PM 741 debian_rsa.pub -a---- 5/18/2024 9:42 AM 2602 id_rsa -a---- 5/18/2024 9:42 AM 569 id_rsa.pub -a---- 8/14/2024 12:08 PM 932 known_hosts -a---- 8/14/2024 12:07 PM 188 known_hosts.old -a---- 8/14/2024 3:18 PM 17 test1.txt PS C:\Users\51638\.ssh> mv .\test1.txt .\test1\ PS C:\Users\51638\.ssh> ls Directory: C:\Users\51638\.ssh Mode LastWriteTime Length Name ---- ------------- ------ ---- d----- 8/14/2024 3:44 PM test1 -a---- 8/14/2024 11:25 AM 154 config -a---- 8/14/2024 12:23 PM 3381 debian_rsa -a---- 8/14/2024 12:23 PM 741 debian_rsa.pub -a---- 5/18/2024 9:42 AM 2602 id_rsa -a---- 5/18/2024 9:42 AM 569 id_rsa.pub -a---- 8/14/2024 12:08 PM 932 known_hosts -a---- 8/14/2024 12:07 PM 188 known_hosts.old PS C:\Users\51638\.ssh> cd .\test1\ PS C:\Users\51638\.ssh\test1> ls Directory: C:\Users\51638\.ssh\test1 Mode LastWriteTime Length Name ---- ------------- ------ ---- -a---- 8/14/2024 3:18 PM 17 test1.txt PS C:\Users\51638\.ssh\test1> cat .\test1.txt content for test1 PS C:\Users\51638\.ssh\test1> cd .. PS C:\Users\51638\.ssh> ls Directory: C:\Users\51638\.ssh Mode LastWriteTime Length Name ---- ------------- ------ ---- d----- 8/14/2024 3:44 PM test1 -a---- 8/14/2024 11:25 AM 154 config -a---- 8/14/2024 12:23 PM 3381 debian_rsa -a---- 8/14/2024 12:23 PM 741 debian_rsa.pub -a---- 5/18/2024 9:42 AM 2602 id_rsa -a---- 5/18/2024 9:42 AM 569 id_rsa.pub -a---- 8/14/2024 12:08 PM 932 known_hosts -a---- 8/14/2024 12:07 PM 188 known_hosts.old PS C:\Users\51638\.ssh> scp .\test1\ root@8.137.109.109:/root/.ssh ./test1: not a regular file PS C:\Users\51638\.ssh> scp -r .\test1\ root@8.137.109.109:/root/.ssh test1.txt 100% 17 0.1KB/s 00:00
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PS : scp -r
The command scp -r is used in Linux to securely copy directories recursively from one location to another over SSH. The -r option stands for recursive, which means it will copy all files and subdirectories within the specified directory.
3) Linux distinguish letter of uppercase and lowercase;
4) >> : how to use it
[root@iZ2vc5lqzt23aweti4j777Z .ssh]# cat test2.txt [root@iZ2vc5lqzt23aweti4j777Z .ssh]# CD .. -bash: CD: command not found [root@iZ2vc5lqzt23aweti4j777Z .ssh]# cd .. [root@iZ2vc5lqzt23aweti4j777Z ~]# ls -al total 72 dr-xr-x---. 7 root root 4096 Aug 14 16:02 . dr-xr-xr-x. 18 root root 4096 Aug 12 15:59 .. -rw------- 1 root root 1449 Aug 14 15:09 .bash_history -rw-r--r--. 1 root root 18 May 18 2020 .bash_logout -rw-r--r--. 1 root root 176 May 18 2020 .bash_profile -rw-r--r--. 1 root root 176 May 18 2020 .bashrc drwxr-xr-x 3 root root 4096 Aug 14 12:08 .cache drwx------ 3 root root 4096 Oct 11 2023 .config -rw-r--r--. 1 root root 100 May 18 2020 .cshrc -rw-r--r-- 1 root root 569 Aug 14 13:20 id_rsa.pub drwxr-xr-x 2 root root 4096 Oct 11 2023 .pip -rw-r--r-- 1 root root 206 Aug 12 15:59 .pydistutils.cfg drwx------ 4 root root 4096 Aug 14 16:03 .ssh -rw-r--r--. 1 root root 129 May 18 2020 .tcshrc -rw-r--r-- 1 root root 26 Aug 14 16:02 test1.txt -rw------- 1 root root 1492 Aug 14 16:02 .viminfo drwxr-xr-x 5 root root 4096 Aug 14 13:30 .vscode-server -rw-r--r-- 1 root root 183 Aug 14 12:08 .wget-hsts [root@iZ2vc5lqzt23aweti4j777Z ~]# cat test1.txt >> .ssh/test test1/ test1.txt test2.txt [root@iZ2vc5lqzt23aweti4j777Z ~]# cat test1.txt >> .ssh/test2.txt [root@iZ2vc5lqzt23aweti4j777Z ~]# cat test1.txt edit and add some content [root@iZ2vc5lqzt23aweti4j777Z ~]# cat .ssh/test2.txt edit and add some content
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