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bash

Reference manpage: man bash

The shell... always under your fingertip. More you master, easier you manage linux machines

Redirect out and err to file and output

strace -f program   2>&1 | tee -a ./stdeo

Helper script prototype

Linuxengineering Toolbox helper script

.bashrc goodies

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/.local/bin" ] ; then
    PATH="$HOME/.local/bin:$PATH"
fi

# set PATH so it includes user's private python venv bin if it exists
if [ -d "$HOME/venv/bin" ] ; then
    PATH="$HOME/venv/bin:$PATH"
fi

# set PATH so it includes user's private rust cargo bin if it exists
if [ -d "$HOME/.cargo/bin" ] ; then
    PATH="$HOME/.cargo/bin:$PATH"
fi

# Look up commands from current working directory
PATH=$PATH:.

# Load environment variables (and other shell definitions) from .env
if [ -e "$HOME/.env" ]
then
    source ${HOME}/.env
fi

Render config files with bare bash

# Note: Variables resolved
cat << EOF > /etc/samba/smb.conf
[global]
    dns forwarder = $DC_DNS_FORWARDER
    netbios name = DC1
    realm = $DC_REALM
    server role = active directory domain controller
    workgroup = $DC_DOMAIN
    idmap_ldb:use rfc2307 = yes
    tls enabled  = yes
[sysvol]
    path = /var/lib/samba/sysvol
    read only = No
[netlogon]
    path = /var/lib/samba/sysvol/$DC_REALM/scripts
    read only = No
EOF