# Linux

Linux Stuff

# Samba Client CIFS

[https://www.thomas-krenn.com/en/wiki/Mounting_a_Windows_Share_in_Linux](https://www.thomas-krenn.com/en/wiki/Mounting_a_Windows_Share_in_Linux)

```
sudo apt-get install cifs-utils
```
```
mount -t cifs //192.168.1.100/freigabe /mnt -o user=testuser
```

For permanent mount

[http://timlehr.com/auto-mount-samba-cifs-shares-via-fstab-on-linux/](http://timlehr.com/auto-mount-samba-cifs-shares-via-fstab-on-linux/)

- .smb
```
user=docker
password=pass
domain=madsprite.com
```

- /etc/fstab
```bash
//192.168.0.5/media /fileserver/media cifs uid=1000,gid=1000,credentials=/root/.smb,_netdev,iocharset=utf8,vers=3.0,noperm,nofail,noauto,x-systemd.automount,x-systemd.idle-timeout=120 0 0
```

<u>x-systemd.automount<u> provides autoconnect features upon filesystem calls.
  
  
/etc/systemd/system/mnt-media.mount
```bash
[Unit]
  Description=CIFS Share for Video Files
  Requires=network-online.target
  After=network-online.service

[Mount]
  What=//192.168.0.10/media
  Where=/mnt/media
  Options=uid=1000,gid=1000,credentials=/root/.smb,_netdev,iocharset=utf8,vers=3.0,noperm,nofail,noauto,x-systemd.automount,x-systemd.idle-timeout=120 0 0
  Type=cifs

[Install]
  WantedBy=multi-user.target
```

# Debian Update Release Distro

update to the next distro stretch buster
```
apt update && apt upgrade -y && sed -i 's/stretch/buster/g' /etc/apt/*.list && sed -i 's/stretch/buster/g' /etc/apt/sources.list.d/*.list

apt update && apt upgrade -y && apt dist-upgrade -y && apt autoremove -y && hostnamectl
```

# Bash Scripting Techniques

### cat multiline
```
cat <<EOF > /etc/apt/sources.list
deb http://http.kali.org/kali kali-rolling main non-free contrib
# deb-src http://http.kali.org/kali kali-rolling main non-free contrib
EOF
```

# Swap

```
sudo fallocate -l 2G /swapfile && sudo chmod 600 /swapfile && sudo mkswap /swapfile && sudo swapon /swapfile && free -h
```
```
sudo cp /etc/fstab /etc/fstab.bak && \
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab
```

```
sysctl vm.swappiness=10 && \
sysctl vm.vfs_cache_pressure=50 && \
echo 'vm.swappiness=10' | sudo tee -a /etc/sysctl.conf && \
echo 'vm.vfs_cache_pressure=50' | sudo tee -a /etc/sysctl.conf
```

# Useradd

```bash
useradd -m -s /bin/bash -d /home/madsprite -c "MadSprite" madsprite

passwd madsprite

usermod -G sudo madsprite
```

# XFS format

```bash
mkfs.xfs -f /dev/sdf
mkdir /disk6
mount -t xfs /dev/sdf /disk6
echo "/dev/sdf  /disk6 xfs  defaults  0  0" >> /etc/fstab
"UUID=acb421fe-e4dc-4081-9cf3-48c6f80077b0 /disk12 xfs defaults,nofail,x-systemd.device-timeout=20  0  0"

blkid
```

# Disable Colour profile

```bash
cd /usr/share/polkit-1/actions/
cp -a  org.freedesktop.color.policy  org.freedesktop.color.policy.orig
sed -e 's|>auth_admin<|>no<|g'  org.freedesktop.color.policy.orig  >  org.freedesktop.color.policy
```

# Qradar CE license issue

https://www.ibm.com/support/pages/node/6395080

# Netboot

```bash
apt update;
apt install ipxe;
wget 'https://boot.netboot.xyz/ipxe/netboot.xyz.lkrn' -O /boot/ipxe.lkrn
```