Bash

Mounting/Unmounting¶

Mount¶

If you get an unexplained error when mounting samba (smb) targets, try to add vers=1.0 at the end of your directive. It forces the system to use samba v1 to establish connection. Beware it is not safe though, you might wanna apply a firmware update on the server machine.

Mount all from fstab¶

# -v is for verbose
# -a is for all 
# it will scan  /etc/fstab and mount all those defined in there
# Depending on the situtation you might have to provide sudo for it to run
mount -av

Mount single time from console¶

# This is for mounting a NAS
sudo mount.cifs //10.18.22.44/some-path/somesubdir /mnt/this-is/where-to-mount/your-external-target -o user=john,password=doe,vers=1.0 0 0

Unmount¶

# you have to provide the [LOCATION of the mount point] or [drive partition name]
# Depending on the situtation you might have to provide sudo for it to run
unmount /media/my/predefined/mount/point

Unload module¶

rmmod nvidia_uvm

Load module¶

modprobe nvidia_uvm

If you change hostname during installation or at some weird point, it may cause delay when issuing sudo on bash. Especially for starship shell. To fix this edit /etc/hosts.

Slow when `sudo` issued¶

It could be due to hostname change. /etc/hosts. Starship also suffers from this sometimes.

Execute command on terminal start (e.g open new terminal)¶

add the command to the end of the .bashrc

nano ~/.bashrc

Move folder content to upper level¶

# Case:
.
├── dir1
│   ├── QWE.md
│   └── dir2
│       ├── ABC.md
│       └──  XYZ.md

# And you want to move content of dir2 to upper level (inside dir1)
.
├── dir1
│   ├── QWE.md
│   └── ABC.md
│   └── XYZ.md
|   └── dir2

# While inside dir1:

mv dir2/* .

# or change /* to /.*

Command history¶

history

Unfreeze SSH session (terminate connection)¶

1. Enter
2. ~ (tilde)
3. . (period)

Block WiFi adapter¶

#sudo apt install rfkill
sudo rfkill block wifi
#or any other adapter, such as bluetooth

Wipe buggy flash/usb drive¶

wipefs -a /dev/your-device

sudo dd if=/dev/zero of=/dev/the-buggy-drive bs=2048 count=32

mkdir with child¶

mkdir -p

Delete dir¶

rmdir yourDir

If has child

rm -r yourDir

Disable all connection except LAN (disable internet)¶

 sudo route del default gw 192.168.1.1

 # To re-enable it:
 sudo route add default gw 192.168.1.1

 # Alternative, assumning your LAN range is 192.168.1.0 with /24 (haven't tried)
 iptables -P INPUT DROP
 iptables -A INPUT -s 192.168.1.0/24 -j ACCEPT

Find your network gateway¶

route -n|grep "^0.0.0.0"

save cd path for shorthand¶

#Add this to bashrc
shopt -s cdable_vars
export myFold=$HOME/Files/Scripts/Main

#So that you can
cd myFold

Reload .bashrc¶

source ~/.bashrc

Local ip in the network¶

hostname -I

Kill webstorm or phpstorm¶

kill -9 $(pgrep -f webstorm)

Suspend job, send to background¶

ctrl + z

Background jobs¶

jobs

Switch back to the job¶

# "1" is the number that is displayed after using jobs comm.
bg %1

Bring to foreground¶

fg %1