LinuxTab - A man page a day keeps the trouble away: January 2021

Thursday, January 21, 2021

ssh - ssh config with multiple keys

$ cat ~/.ssh/config

Host: github.com

User git

IdentityFile ~/.ssh.id_rsa

Host github.com-2ndhost

HostName github.com

User git

IdentifyFiller ~/.ssh/my-pub.key

GPG - Generate gpg key to sign your commit on git/github

How to sign your commit on github repo

1. Check if gpg is installed..

If not download from gnupg.org

# wget https://gnupg.org/ftp/gcrypt/gnupg/gnupg-2.2.27.tar.bz2

2. Verify if ppg is instaled

root@master ~]# gpg

gpg: directory '/root/.gnupg' created

gpg: keybox '/root/.gnupg/pubring.kbx' created

gpg: WARNING: no command supplied. Trying to guess what you mean ...

gpg: Go ahead and type your message ...

gpg: signal Interrupt caught ... exiting

3. Generate a certificate

[root@master ~]# gpg --full-generate-key

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law.

Please select what kind of key you want:

(1) RSA and RSA (default)

(2) DSA and Elgamal

(3) DSA (sign only)

(4) RSA (sign only)

Your selection?

RSA keys may be between 1024 and 4096 bits long.

What keysize do you want? (2048) 4096

Requested keysize is 4096 bits

Please specify how long the key should be valid.

0 = key does not expire

<n> = key expires in n days

<n>w = key expires in n weeks

<n>m = key expires in n months

<n>y = key expires in n years

Key is valid for? (0)

Key does not expire at all

Is this correct? (y/N) y

GnuPG needs to construct a user ID to identify your key.

Real name: sam

Name must be at least 5 characters long

Real name: sam@gmail.com

Email address: sam@gmail.com

Comment: no coment

You selected this USER-ID:

"sam@gmail.com (no coment) <sam@gmail.com>"

Change (N)ame, (C)omment, (E)mail or (O)kay/(Q)uit? o

We need to generate a lot of random bytes. It is a good idea to perform

some other action (type on the keyboard, move the mouse, utilize the

disks) during the prime generation; this gives the random number

generator a better chance to gain enough entropy.

We need to generate a lot of random bytes. It is a good idea to perform

some other action (type on the keyboard, move the mouse, utilize the

disks) during the prime generation; this gives the random number

generator a better chance to gain enough entropy.

gpg: /root/.gnupg/trustdb.gpg: trustdb created

gpg: key DC882D52337328DE marked as ultimately trusted

gpg: directory '/root/.gnupg/openpgp-revocs.d' created

gpg: revocation certificate stored as '/root/.gnupg/openpgp-revocs.d/2FFE7EDE77C31A95FFE6DBAFDC882D52337328DE.rev'

public and secret key created and signed.

pub rsa4096 2021-01-20 [SC]

2FFE7EDE77C31A95FFE6DBAFDC882D52337328DE

uid sam@gmail.com (no coment) <sam@gmail.com>

sub rsa4096 2021-01-20 [E]

Certificate is successfully created. now, using this certificate, you can create public/private key

4. Now, list the secret keys, since we have only one, so really does not matter.

[root@master ~]# gpg --list-secret-keys 2FFE7EDE77C31A95FFE6DBAFDC882D52337328DE

gpg: checking the trustdb

gpg: marginals needed: 3 completes needed: 1 trust model: pgp

gpg: depth: 0 valid: 1 signed: 0 trust: 0-, 0q, 0n, 0m, 0f, 1u

sec rsa4096 2021-01-20 [SC]

2FFE7EDE77C31A95FFE6DBAFDC882D52337328DE

uid [ultimate] sam@gmail.com (no coment) <sam@gmail.com>

ssb rsa4096 2021-01-20 [E]

5. Now export the public key

[root@master ~]# wget https://gnupg.org/ftp/gcrypt/gnupg/gnupg-2.2.27.tar.bz2^C

[root@master ~]# gpg --armor --export 2FFE7EDE77C31A95FFE6DBAFDC882D52337328DE

-----BEGIN PGP PUBLIC KEY BLOCK-----

mQINBGAIPXsBEADAF4jVU4VU9yZ1+nR0Zwf+h4UccvcFVCtDPq/NR+ZWS0RorJNO

/bPZaz+WbAzXajs3UY2K/o4J5oJOAh5x5EtKunrztylD53Ttns8LXeDzf0Y1QULj

ODpfEbfYEzpsjtO5pvLhDTUFPpmN4gJz0vOnxrwMUPxps27G4q5lGAWUUy3JyBMp

MSno1FCHbeptIUT0QByixbwaRNBDV6SN+emG0U3qUasNcIy9w29iouT0napbtwUJ

0ZnNa2N0Zol50Zt5EOqeUuQD5kJpaKOLbNUaocJrQSWFrBrPnNaMcoEw/n0mXJLG

28f4ih3zYyFr2CsDOVJ9Oykk3EEwwlvqjCRFFcQDhWjtYkD3SBxSjUFSaL04irGy

UDcxzfVwodcjL1GbxrFKGKAZ4eTv4Zvc4hZp/Ix9iq/tzKIe0KCLNPYEMJBOvWPU

0TGeqTBysskJ7Z6CVz8rUT2DV35PP02eqQAEQYKs/tVyvasxB1j/FO9dhnqyoFEp

YOxfEuQn0wqKWIqQF/v0XRWEZLP/mRH7miLqXp5TRc1UFm5GiheTmiB4VcrxjZlt

sF3QNSGiOrZwovDJ337DT0FeVXU5CVf72J8hJ7Q/azS4IFovhw6+9FmS9sdIhSXi

1sMsy2QjQgEXaJtVZh25QrbNwjXelBhnWtf1daspRdof5s92O8oDmrHUfwARAQAB

tClzYW1AZ21haWwuY29tIChubyBjb21lbnQpIDxzYW1AZ21haWwuY29tPokCTgQT

AQgAOBYhBC/+ft53wxqV/+bbr9yILVIzcyjeBQJgCD17AhsDBQsJCAcCBhUKCQgL

AgQWAgMBAh4BAheAAAoJENyILVIzcyje2tUP/jSrhYFc9z0AUjA4mlChZVZl2kLY

AIGMfWXNz45jwoBwdtoQcoHBR6jM0KLyvIPOqgnG6qBD1fVjMTtSVXGW3eKcZtem

lh6TFbnkGVXOb8dS0VlwE5RQOk4f7i23IzWrsnCxod5oCDHmpELf6f7JiCnlls8B

1ATe+OXMuYw4hmWQ794/LWBlpI7OXHDLbQKW8bo4B5ciLOInM5tJfL9zCpcvS4X/

QeOsDTWg/suFsOQxtQ93gyRD7KqmG7KylVXZU29BtHi90p5q6RM6BWhQP40zuTDw

KG5ONFpn1A31WdO876db1azOcJ1B34+BjXKT4wNEkekV8z5AW14W6M/ql5LAKIOD

atmwnSQjqHDxjVksulFR5HY3RaSGYT+BvH2K/CTCVqVIZd0wV47AA2YnLIMz5gL3

y3obsutnZQDbhFB6jYPwIn3957Gq0yX+WBdVwCSNO84QDCAcRpz6pl7+atjYCAyg

1Kp3CLHP/mS3VbiSxGLae23lFdCvowTAr+KIc2vdwMEO6JhDBKMdMOrLllF8CISx

t1GczCgjSyClKAns/54G9OVpVXtW27a+E3b+hdlE2kIQh2Ju7VGXHogEVLjgl2gM

63xG6OAoPFlmioPBx+EeNgiwGH5a+R7RaqmOqvzVfBscboVIndlPBJ9xUGfrf7i4

ZoQVSZR9ZL/lGHEVuQINBGAIPXsBEADHm/Jz35wjjqecL/0sKl6roS4fBDIWLRai

eN0awaRI88CIf+fO8RBFDz2Yh0rgpL3WN29teK7uel0glMS1N+RLDJLdKz6EySbI

pzrNIRLLGuLmaVeqe6/y1kdrhbd1FDociGIsBrjE8ai8yDkI5G3u4YG213rtxnwr

2zi5quNT19I4eCOKjHsFUaXNByo4BrhdZPR6CbyuZjWScI3vEdrkjehZ2u0TSVKf

7JdCSw4zSl1LH2I1qwywmnW6rCI7oZOewQLFa0v+GZ++N5k+4jtXBzpdPR7XdXSE

Hwh7cXxu5v/sYEHsiRLoEB5a1vGjzWM77EWoghNXv2PzlRl+G7cuWDWyNXOjSEI9

lDxKQr30l9pau+KuA4xl9LR/9UOwhW4IXIXK8WSHnwYLGz15Lanco8o4NqzQIb+v

sSP2gImr2cYLhuwHcO0CsPkglujL7fafzOdQx3CcOzfM+ileN+2kgxCH3fa5DWJI

ryFEFdQUQD6UV1K4mYaTMV5og6rlDUhoHpc6z58Dm6rBlWb+/9VIMcN7Z6RvGcMn

qLtQQBshmN5MTC/10Zpcepc4kQ7mLdW3TEPTOGryZfPbJQFqT8EcWarLYfP8AqF7

zST1vJ/GpMmob5AB/NpznI9AIMUOVMd27c7zWTxh8htsSgHzrPt7RTWTahmDzYtn

bbXkCTNU6wARAQABiQI2BBgBCAAgFiEEL/5+3nfDGpX/5tuv3IgtUjNzKN4FAmAI

PXsCGwwACgkQ3IgtUjNzKN6sZRAAkUVfM2ZRJQWFUSnSuoMLmsRMlAZQaRgs1+FZ

dTrxxj801mEHsLlmt0sgyIruDwVsmjeShqJ5+wvl7NOsU/GSSg1rHwSHEbNBPYnR

AJceNYfbIQB9EC8KVelNm4/VdDMpy9zaGOsGZCGeQv5GIN7HZRKcyTjyPMAEhSqs

0alCkRF8GGdKP0YKfiPoB3HA8dwTfP5CpZaOspbO1PExlmnR269wulg23Gvb1to/

24FEf8BU3iG13xTn3mot6IvoxMXGU5XxP7fF1HUC/P8froaYUlUpl5LS6TAZJs2f

WXD3GMjwFmri0ZnchbS8zEBQkqq6cLqYXbn15Xz0CxC9dLEqP0cOnhm8o99FdghS

KWM5RQ0GvyBNg6jOYeTSvT7LC0ESIw54BcuiTeft0UekVs2XGTseRuarojRz57G7

zatVl6Q+E9y/YR9hdG3vvQmsZI1zAqOAsWHqsU0vfFkxM711MJXNE/pG+ghVWjZR

Ctbi4/DhlkVrJ/b5dU+phERCVyKgc1tZlhfvKgHcIypw4OE03E3g4xI01yzEM8vn

5Y5djDJmFnnp8CN+kSb9i1YkYcT675ckFXEoIy+PmjMzKALSfypsRY53HOI6Riif

Bi9iNtZZ5BxmLq5pkySOTVVyglE34TkjnW2JK5x3swUHXokITEblOIYb7nUm/21y

RfjI+P8=

=Yl6x

-----END PGP PUBLIC KEY BLOCK-----

[root@master ~]#

We just exported our public key. Copy all the text as it is displayed. Do not add any space or delete any space or key.

ALl the text from --begin to end line.

- Goto github.com on your account,

- Go to setting, and go to ssh and gpg keys

- Go to GPG key section and add your public key.

- After you add, you will see shorter keyid and subkeys.

Monday, January 18, 2021

Git - practice

Sam@LAPTOP-CJKC92UJ MINGW64 ~

$ ssh-keygen

Generating public/private rsa key pair.

Enter file in which to save the key (/c/Users/Sam/.ssh/id_rsa): c

Sam@LAPTOP-CJKC92UJ MINGW64 ~

$ bash

$ ssh-keygen.exe -t rsa -b 4096 -C "Acct for github"

$ pwd

/c/Users/Sam/.ssh

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ ls

id_rsa id_rsa.pub known_hosts

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ cat id_rsa.pub

ssh-rsa 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 Acct for github

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ git config --list

http.sslbackend=openssl

http.sslcainfo=C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt

credential.helper=manager

diff.astextplain.textconv=astextplain

filter.lfs.clean=git-lfs clean -- %f

filter.lfs.smudge=git-lfs smudge -- %f

filter.lfs.process=git-lfs filter-process

filter.lfs.required=true

core.autocrlf=true

core.fscache=true

core.symlinks=false

user.name=Kay

user.email=samk@gmail.com

diff.tool=diffmerge

difftool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe "$LOCAL" "$REMOTE"

merge.tool=diffmerge

mergetool.diffmerge.trustexitcode=true

mergetool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe /merge /result="$MERGED" "$LOCAL" "$BASE" "$REMOTE"

core.longpaths=true

:...skipping...

http.sslbackend=openssl

http.sslcainfo=C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt

credential.helper=manager

diff.astextplain.textconv=astextplain

filter.lfs.clean=git-lfs clean -- %f

filter.lfs.smudge=git-lfs smudge -- %f

filter.lfs.process=git-lfs filter-process

filter.lfs.required=true

core.autocrlf=true

core.fscache=true

core.symlinks=false

user.name=Kay

user.email=samk@gmail.com

diff.tool=diffmerge

difftool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe "$LOCAL" "$REMOTE"

merge.tool=diffmerge

mergetool.diffmerge.trustexitcode=true

mergetool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe /merge /result="$MERGED" "$LOCAL" "$BASE" "$REMOTE"

core.longpaths=true

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ git config --list

http.sslbackend=openssl

http.sslcainfo=C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt

credential.helper=manager

diff.astextplain.textconv=astextplain

filter.lfs.clean=git-lfs clean -- %f

filter.lfs.smudge=git-lfs smudge -- %f

filter.lfs.process=git-lfs filter-process

filter.lfs.required=true

core.autocrlf=true

core.fscache=true

core.symlinks=false

user.name=Kay

user.email=samk@gmail.com

diff.tool=diffmerge

difftool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe "$LOCAL" "$REMOTE"

merge.tool=diffmerge

mergetool.diffmerge.trustexitcode=true

mergetool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe /merge /result="$MERGED" "$LOCAL" "$BASE" "$REMOTE"

core.longpaths=true

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ git config --list

http.sslbackend=openssl

http.sslcainfo=C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt

credential.helper=manager

diff.astextplain.textconv=astextplain

filter.lfs.clean=git-lfs clean -- %f

filter.lfs.smudge=git-lfs smudge -- %f

filter.lfs.process=git-lfs filter-process

filter.lfs.required=true

core.autocrlf=true

core.fscache=true

core.symlinks=false

user.name=Kay

user.email=samk@gmail.com

diff.tool=diffmerge

difftool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe "$LOCAL" "$REMOTE"

merge.tool=diffmerge

mergetool.diffmerge.trustexitcode=true

mergetool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe /merge /result="$MERGED" "$LOCAL" "$BASE" "$REMOTE"

core.longpaths=true

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ git config --list

http.sslbackend=openssl

http.sslcainfo=C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt

credential.helper=manager

diff.astextplain.textconv=astextplain

filter.lfs.clean=git-lfs clean -- %f

filter.lfs.smudge=git-lfs smudge -- %f

filter.lfs.process=git-lfs filter-process

filter.lfs.required=true

core.autocrlf=true

core.fscache=true

core.symlinks=false

user.name=Kay

user.email=samk@gmail.com

diff.tool=diffmerge

difftool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe "$LOCAL" "$REMOTE"

merge.tool=diffmerge

mergetool.diffmerge.trustexitcode=true

mergetool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe /merge /result="$MERGED" "$LOCAL" "$BASE" "$REMOTE"

core.longpaths=true

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ ssh-keygen.exe -t rsa -b 4096 -C "Personal Account Key" -f ~/.ssh/personal-key

Generating public/private rsa key pair.

Enter passphrase (empty for no passphrase):

Enter same passphrase again:

Your identification has been saved in /c/Users/Sam/.ssh/personal-key

Your public key has been saved in /c/Users/Sam/.ssh/personal-key.pub

The key fingerprint is:

SHA256:ZuJ0VHJ6m4fyMytT0UPGF7Xepg0tHsQvQ/dLCtuOcok Personal Account Key

The key's randomart image is:

+---[RSA 4096]----+

| . o. .o.|

| = +.. .|

| o .+ .+..|

| . ..+oo.+o|

| o S +o..*o*|

| o = o..+.oX.|

| . .=..oo..|

| oE *o |

| o+. . |

+----[SHA256]-----+

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ ls -ltr

total 20

-rw-r--r-- 1 Sam 197121 2156 Jun 8 2020 known_hosts

-rw-r--r-- 1 Sam 197121 3381 Jan 18 22:58 id_rsa

-rw-r--r-- 1 Sam 197121 741 Jan 18 22:58 id_rsa.pub

-rw-r--r-- 1 Sam 197121 3389 Jan 18 23:12 personal-key

-rw-r--r-- 1 Sam 197121 746 Jan 18 23:12 personal-key.pub

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ touch -m 077 ~/.ssh/config

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ pwd

/c/Users/Sam/.ssh

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ ls -ltr

total 20

-rw-r--r-- 1 Sam 197121 2156 Jun 8 2020 known_hosts

-rw-r--r-- 1 Sam 197121 3381 Jan 18 22:58 id_rsa

-rw-r--r-- 1 Sam 197121 741 Jan 18 22:58 id_rsa.pub

-rw-r--r-- 1 Sam 197121 3389 Jan 18 23:12 personal-key

-rw-r--r-- 1 Sam 197121 746 Jan 18 23:12 personal-key.pub

-rw-r--r-- 1 Sam 197121 0 Jan 18 23:12 077

-rw-r--r-- 1 Sam 197121 0 Jan 18 23:12 config

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ chmod 077 config

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ ls -l config

-rw-r--r-- 1 Sam 197121 0 Jan 18 23:12 config

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ pwd

/c/Users/Sam/.ssh

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ pwd

/c/Users/Sam/.ssh

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.ssh

$ cd

Sam@LAPTOP-CJKC92UJ MINGW64 ~

$ pwd

/c/Users/Sam

Sam@LAPTOP-CJKC92UJ MINGW64 ~

$ ls

'3D Objects'

AppData

'Application Data'

best

'Cisco Packet Tracer 7.1.1'

Contacts

copy

cracked.txt

Desktop

Doc-Root

Documents

Downloads

Dropbox

eclipse-workspace

Favorites

git

GNS3

gomata

IdeaProjects

IntelGraphicsProfiles

kubectl.exe

Links

'Local Settings'

MicrosoftEdgeBackups

Music

'My Documents'

myproject

NetHood

NTUSER.DAT

ntuser.dat.LOG1

ntuser.dat.LOG2

NTUSER.DAT{ac195edd-5478-11eb-9c89-8a42866465a2}.TM.blf

NTUSER.DAT{ac195edd-5478-11eb-9c89-8a42866465a2}.TMContainer00000000000000000001.regtrans-ms

NTUSER.DAT{ac195edd-5478-11eb-9c89-8a42866465a2}.TMContainer00000000000000000002.regtrans-ms

ntuser.ini

OneDrive

Pictures

PrintHood

projects

PycharmProjects

Recent

Roaming

sam

'Saved Games'

Searches

SendTo

'Start Menu'

Templates

Tracing

Untitled.ipynb

Videos

'VirtualBox VMs'

Sam@LAPTOP-CJKC92UJ MINGW64 ~

$ cd .git

bash: cd: .git: No such file or directory

Sam@LAPTOP-CJKC92UJ MINGW64 ~

$ git init

Initialized empty Git repository in C:/Users/Sam/.git/

Sam@LAPTOP-CJKC92UJ MINGW64 ~ (master)

$ pwd

/c/Users/Sam

Sam@LAPTOP-CJKC92UJ MINGW64 ~ (master)

$ ls

'3D Objects'

AppData

'Application Data'

best

'Cisco Packet Tracer 7.1.1'

Contacts

copy

cracked.txt

Desktop

Doc-Root

Documents

Downloads

Dropbox

eclipse-workspace

Favorites

git

GNS3

gomata

IdeaProjects

IntelGraphicsProfiles

kubectl.exe

Links

'Local Settings'

MicrosoftEdgeBackups

Music

'My Documents'

myproject

NetHood

NTUSER.DAT

ntuser.dat.LOG1

ntuser.dat.LOG2

NTUSER.DAT{ac195edd-5478-11eb-9c89-8a42866465a2}.TM.blf

NTUSER.DAT{ac195edd-5478-11eb-9c89-8a42866465a2}.TMContainer00000000000000000001.regtrans-ms

NTUSER.DAT{ac195edd-5478-11eb-9c89-8a42866465a2}.TMContainer00000000000000000002.regtrans-ms

ntuser.ini

OneDrive

Pictures

PrintHood

projects

PycharmProjects

Recent

Roaming

sam

'Saved Games'

Searches

SendTo

'Start Menu'

Templates

Tracing

Untitled.ipynb

Videos

'VirtualBox VMs'

Sam@LAPTOP-CJKC92UJ MINGW64 ~ (master)

$ pwd

/c/Users/Sam

Sam@LAPTOP-CJKC92UJ MINGW64 ~ (master)

$ cd .git

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.git (GIT_DIR!)

$ ls

config description HEAD hooks info objects refs

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.git (GIT_DIR!)

$ pwd

/c/Users/Sam/.git

Sam@LAPTOP-CJKC92UJ MINGW64 ~/.git (GIT_DIR!)

$ cd ..

Sam@LAPTOP-CJKC92UJ MINGW64 ~ (master)

$ rmdir .git

rmdir: failed to remove '.git': Directory not empty

Sam@LAPTOP-CJKC92UJ MINGW64 ~ (master)

$ rm -ef .git

rm: unknown option -- e

Try 'rm --help' for more information.

Sam@LAPTOP-CJKC92UJ MINGW64 ~ (master)

$ rm -rf .git

Sam@LAPTOP-CJKC92UJ MINGW64 ~

$ mkdir git

mkdir: cannot create directory ‘git’: File exists

Sam@LAPTOP-CJKC92UJ MINGW64 ~

$ cd git

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ ls

lab Projects

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ ls -la

total 32

drwxr-xr-x 1 Sam 197121 0 Jan 3 22:26 .

drwxr-xr-x 1 Sam 197121 0 Jan 18 23:18 ..

drwxr-xr-x 1 Sam 197121 0 Jan 3 22:46 lab

drwxr-xr-x 1 Sam 197121 0 Jan 3 22:25 Projects

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ cd .git

bash: cd: .git: No such file or directory

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ pwd

/c/Users/Sam/git

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ ls

lab Projects

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ cd lab

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab (newbranch)

$ ls

a.txt b.txt c.txt d.txt e.txt f.txt g.txt

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab (newbranch)

$ more .git/

COMMIT_EDITMSG description index objects/

config HEAD logs/ refs/

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab (newbranch)

$ more .git/^C

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab (newbranch)

$ pwd

/c/Users/Sam/git/lab

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab (newbranch)

$ cd ../Projects/

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/Projects (master)

$ ls

MySoftware

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/Projects (master)

$ ls -la

total 8

drwxr-xr-x 1 Sam 197121 0 Jan 3 22:25 .

drwxr-xr-x 1 Sam 197121 0 Jan 3 22:26 ..

drwxr-xr-x 1 Sam 197121 0 Jan 3 22:26 .git

drwxr-xr-x 1 Sam 197121 0 Apr 12 2020 MySoftware

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/Projects (master)

$ pwd

/c/Users/Sam/git/Projects

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/Projects (master)

$ cd ..

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ pwd

/c/Users/Sam/git

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ mkdir lab1

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ pwd

/c/Users/Sam/git

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git

$ cd lab1

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1

$ pwd

/c/Users/Sam/git/lab1

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1

$ echo "Testing " >testme

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1

$ cat testme

Testing

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1

$ git add .

fatal: not a git repository (or any of the parent directories): .git

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1

$ pwd

/c/Users/Sam/git/lab1

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1

$ git init

Initialized empty Git repository in C:/Users/Sam/git/lab1/.git/

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ cat >> testme

This is just a testing page

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git status

On branch master

No commits yet

Untracked files:

(use "git add <file>..." to include in what will be committed)

testme

nothing added to commit but untracked files present (use "git add" to track)

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git add .

warning: LF will be replaced by CRLF in testme.

The file will have its original line endings in your working directory

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ pwd

/c/Users/Sam/git/lab1

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ ls

testme

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git commit -m "Test commit"

[master (root-commit) bed2813] Test commit

1 file changed, 2 insertions(+)

create mode 100644 testme

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git log

commit bed281369c51e63a256c09ec88b2b98c7fabbe2e (HEAD -> master)

Author: Kay <samk@gmail.com>

Date: Mon Jan 18 23:21:33 2021 -0500

Test commit

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git config --list

http.sslbackend=openssl

http.sslcainfo=C:/Program Files/Git/mingw64/ssl/certs/ca-bundle.crt

credential.helper=manager

diff.astextplain.textconv=astextplain

filter.lfs.clean=git-lfs clean -- %f

filter.lfs.smudge=git-lfs smudge -- %f

filter.lfs.process=git-lfs filter-process

filter.lfs.required=true

core.autocrlf=true

core.fscache=true

core.symlinks=false

user.name=Kay

user.email=samk@gmail.com

diff.tool=diffmerge

difftool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe "$LOCAL" "$REMOTE"

merge.tool=diffmerge

mergetool.diffmerge.trustexitcode=true

mergetool.diffmerge.cmd=C:/Program\ Files/SourceGear/Common/DiffMerge/sgdm.exe /merge /result="$MERGED" "$LOCAL" "$BASE" "$REMOTE"

core.longpaths=true

core.repositoryformatversion=0

core.filemode=false

core.bare=false

core.logallrefupdates=true

core.symlinks=false

core.ignorecase=true

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git remote add origin https://github.com/samkk/sam.git

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git status

On branch master

nothing to commit, working tree clean

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git log

commit bed281369c51e63a256c09ec88b2b98c7fabbe2e (HEAD -> master)

Author: Kay <samk@gmail.com>

Date: Mon Jan 18 23:21:33 2021 -0500

Test commit

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git push origin master

Enumerating objects: 3, done.

Counting objects: 100% (3/3), done.

Writing objects: 100% (3/3), 236 bytes | 236.00 KiB/s, done.

Total 3 (delta 0), reused 0 (delta 0), pack-reused 0

To https://github.com/samkk/sam.git

* [new branch] master -> master

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ pwd

/c/Users/Sam/git/lab1

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ gh repo clone harke--/notebook

bash: gh: command not found

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ pwd

/c/Users/Sam/git/lab1

Sam@LAPTOP-CJKC92UJ MINGW64 ~/git/lab1 (master)

$ git clone https://github.com/harke--/notebook.git

Cloning into 'notebook'...

remote: Enumerating objects: 32, done.

remote: Counting objects: 100% (32/32), done.

remote: Compressing objects: 100% (26/26), done.

Receiviremote: Total 3582 (delta 10), reused 23 (delta 6), pack-reused 3550

Receiving objects: 100% (3582/3582), 8.79 MiB | 6.83 MiB/s, done.

Resolving deltas: 100% (1781/1781), done.

Saturday, January 16, 2021

AWS - Configure Route 53 (VPC, Subnet, A record, PTR record, CNAME)

Lab -> DNS - Route 53

Private Hosted Zone

Create a VPC

1. Go to AWS console and search for VPC

2. On VPC dashboard, click on create VPC

3. On create VPC page, Name your vpc and specify the IP subnet

Name: DC_VPC

IPv4 Block: 10.0.0.0/16

4. Click Yes, Create.

Now, we have to create subnet

5. Click on Create subnet

6. Specify subnet info (Tag) such as

name: DC_Pub_VPC

Specify your VPC from dropdown: DC_VPC

Specify availibity zone:

IPv$ CIDR block: 10.0.10.0/24

7, Now click on Yes create

Since we need to connect to internet, we need to create an Internet Gateway,

8. Click on Inernet Gateway and click on Create internet Gateway

9. Tag your IGW

Name Tag: DC_IGW

10. Click on Yes, create

OK, Now we just created IGW. We have to associate IGW to VPC.

11. Click on Attach to VPC

12. Select your IGW and click on Yes Attach,

13. Now, click on Route Tables on VPC Dashboard

14. R Click on your Route table and rename to DC_Public_route

15. Click on select the routable and click on Edit

16. Click on Add another route

17. Add default route 0.0.0.0/0 in DC_public_route table and select target as "IGW-*".

18. Now, click on Save.

19. Click on Subnet association tab, and click on Edit

20. Select DC_public_subnet check box and click save

Now, create another instance.

- Go to EC2 dashboard and follow standard procedure to create new instance,

- Select Amazon Linux AMI or any linux flavor of your choice and click next

- Select General Purpose - T2.micro free tier and click next

- On configure instance page, select your VPC

Network: DC_VPC

Subnet: DC_Public_subnet

Auto Assign Public IP: Enable

- Click next and next Add Tag: Name: Web Server

- On Security Group page, select create new security group

Security Group Name: DC_Pub_Sec_Group

Description: Public Security Group

- Click on Review and Launch and finally click on Launch,

- On Key pair page, either create a new one or use an existing key pair.

- Click Launch instance

Now, We will launch an Windows instance

- Click on Launch instance

- Select free tier Windows server 2016 base

- t2. Micro and click next.

- Select Network: DC_VPC

Subnet: DC_Public_Subnet

Auto-assign Public IP: Enable and click Next

- Click next on Storage page

- Add tag Name: Windows Server 2016 and click Next

- On Security Group Page, select new security group

security Group Name: DC_Pub_sec_group_Win

Description: Windows security Group

- Click Next and click on Review and Launch,

- Use existing key or create a new key and click on Launch instances.

Now, Go to EC2 Dash Board and click on Your Linux instance

- Get the IP of the instance and login using putty. and type sudo -i at the prompt to become root

Now, we will install web server

# yum install httpd

# systemctl start httpd

# systemctl enable httpd

Now, using your windows machine, try to access web site. But you can't. The reason is that

firewall (Security Group is blocking the access.

To enable the access, click on your linux instance and click on security group -> inbound

- Click on Edit and click on add the entry

http 80 custom 0.0.0.0/0

and click save

Now, refresh the browser on your windows machine, you should be able to open it.

Now, fun part begins. We will be connecting the web server using fully qualified domain name

using windows machine. We will configure Route 53.

Now, there are certain tasks we have to confgure.

Go to VPC dashboard,

- Select your VPC and Edit DNS Resolution

- It is selected to Yes and click on Save

Again,

R click on your VPC and click on Edit DNS Hostnames

- It is selected Yes and click Save

Now, Go to AWS Dash Board, and look for Route 53 under Networking and ocntent Delivery

- Click on DNS Management

- Click on Hosted Zone

- Click on Create Hosted Zone

dommain: microinfosys.com

Comment: DNS testing

Type: Private Hosted Zone for AWS VPC

VPC IP: Northern VA

- Now, Click on Create

- In microinfosys.com server, we have NS record and SOA record

- Select microinfosys.com NS line and click on Create Record Set

on Right side, add the following

Name: aws.microinfosys.com

Type: A - IPv$ address

Value: (10.0.10.120)

Route Policy: Simple

- Click on create

We successfully created A record for aws.microinfosys.com

Now try to load this page from microsoft 2016 server browser.

You should have access