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README.md - minor fixes and updates

- signed-off-by: trimstray <trimstray@gmail.com>
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trimstray 4 years ago
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README.md View File

@@ -222,8 +222,8 @@ performance of any of your sites from across the globe.<br>
##### :black_small_square: Security/hardening

<p>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://emeraldonion.org/"><b>Emerald Onion</b></a> - Seattle-based encrypted-transit internet service provider.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.unbound.net/"><b>unbound</b></a> - validating, recursive, and caching DNS resolver (with TLS).<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://emeraldonion.org/"><b>Emerald Onion</b></a> - seattle-based encrypted-transit internet service provider.<br>
&nbsp;&nbsp;:small_orange_diamond: <a href="https://www.unbound.net/"><b>Unbound</b></a> - validating, recursive, and caching DNS resolver (with TLS).<br>
</p>

#### Lists
@@ -277,6 +277,7 @@ performance of any of your sites from across the globe.<br>
* [du](#tool-du)
* [inotifywait](#tool-inotifywait)
* [openssl](#tool-openssl)
* [secure-delete](#tool-secure-delete)
- **[HTTP/HTTPS](#http-https)**
* [curl](#tool-curl)
* [httpie](#tool-httpie)
@@ -380,6 +381,25 @@ history | cut -c 8-
fc -l -n 1 | sed 's/^\s*//'
```

###### Run command(s) after exit session

```bash
cat > /etc/profile << __EOF__
_after_logout() {

username=$(whoami)

for _pid in $(ps afx | grep sshd | grep "$username" | awk '{print $1}') ; do

kill -9 $_pid

done

}
trap _after_logout EXIT
__EOF__
```

___

##### Tool: [mount](https://en.wikipedia.org/wiki/Mount_(Unix))
@@ -528,6 +548,14 @@ cd /
tar -czvpf /mnt/system$(date +%d%m%Y%s).tgz --directory=/ --exclude=proc/* --exclude=sys/* --exclude=dev/* --exclude=mnt/* .
```

###### System backup with exclude specific directories (pigz)

```bash
tar cvpf /backup/snapshot-$(date +%d%m%Y%s).tgz --directory=/ \
--exclude=proc/* --exclude=sys/* --exclude=dev/* \
--exclude=mnt/* --exclude=tmp/* --use-compress-program=pigz .
```

___

##### Tool: [dump](https://en.wikipedia.org/wiki/Dump_(program))
@@ -591,6 +619,21 @@ tr : '\n' <<<$PATH
chmod -R -x+X *
```

###### Restore permission for /bin/chmod

```bash
# 1:
cp /bin/ls chmod.01
cp /bin/chmod chmod.01
./chmod.01 700 file

# 2:
/bin/busybox chmod 0700 /bin/chmod

# 3:
setfacl --set u::rwx,g::---,o::--- /bin/chmod
```

___

##### Tool: [who](https://en.wikipedia.org/wiki/Who_(Unix))
@@ -621,6 +664,8 @@ ___
du | sort -r -n | awk '{split("K M G",v); s=1; while($1>1024){$1/=1024; s++} print int($1)" "v[s]"\t"$2}' | head -n 20
```

___

##### Tool: [inotifywait](https://en.wikipedia.org/wiki/GNU_Screen)

###### Init tool everytime a file in a directory is modified
@@ -629,6 +674,8 @@ du | sort -r -n | awk '{split("K M G",v); s=1; while($1>1024){$1/=1024; s++} pri
while true ; do inotifywait -r -e MODIFY dir/ && ls dir/ ; done;
```

___

##### Tool: [openssl](https://www.openssl.org/)

###### Testing connection to remote host
@@ -747,6 +794,40 @@ openssl x509 -in ${_fd_pem} -outform der -out ${_fd_der} )

___

##### Tool: [secure-delete](https://wiki.archlinux.org/index.php/Securely_wipe_disk)

###### Secure delete with shred

```bash
shred -vfuz -n 10 file
shred --verbose --random-source=/dev/urandom -n 1 /dev/sda
```

###### Secure delete with scrub

```bash
scrub -p dod /dev/sda
scrub -p dod -r file
```

###### Secure delete with badblocks

```bash
badblocks -s -w -t random -v /dev/sda
badblocks -c 10240 -s -w -t random -v /dev/sda
```

###### Secure delete with secure-delete

```bash
srm -vz /tmp/file
sfill -vz /local
sdmem -v
swapoff /dev/sda5 && sswap -vz /dev/sda5
```

___

##### Tool: [gnutls-cli](https://gnutls.org/manual/html_node/gnutls_002dcli-Invocation.html)

###### Testing connection to remote host (with sni)
@@ -847,6 +928,24 @@ ssh host -l user $(<cmd.txt)
ssh-keygen -y -f ~/.ssh/id_rsa
```

###### Get all fingerprints

```bash
ssh-keygen -l -f .ssh/known_hosts
```

###### Ssh authentication with user password

```bash
ssh -o PreferredAuthentications=password -o PubkeyAuthentication=no user@remote_host
```

###### Ssh authentication with publickey

```bash
ssh -o PreferredAuthentications=publickey -o PubkeyAuthentication=yes -i id_rsa user@remote_host
```

___

##### Tool: [linux-dev](https://www.tldp.org/LDP/abs/html/devref1.html)


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