CLI shell settings for Bourne (sh), Bash, Z (zsh), etc.. ~/.profile seems common to all.

.profile

# .profile is used by both Bash and Zsh, .bash_profile only by Bash, and .bashrc by Bash but not on MacOS (no colors, for one).
export PATH="$(brew --prefix homebrew/php/php71)/bin:$PATH"
export CLICOLOR=1
export GREP_OPTIONS='--color=auto'
# Inherit prompt user@host:yellow path$
export PROMPT=$'%n@%m:\e[33m%c\e[0m%# '  # Zsh
export PS1='\[\a\]\t \u@\h:\[\e[93m\]\w\[\e[0m\]\$ '  # Bash. Use .bashrc on Debian.
ssh-add ~/.ssh/id_ed25519  # For GitLab key in Debian.
# Zsh doesn't see these in MacOS Sierra
alias d='diff -Bwurx ".*"'
alias ls='ls --color=auto'
alias ll='ls -alF'
alias la='ls -A'
alias l='ls -CF'
alias g='pcregrep -MHrn --color=auto'
mark(){ perl -pe 's/(.*ERR.*)/\x1b[93;41m$1\x1b[0m/i; s/(.*warn.*)/\x1b[93m$1\x1b[0m/i';}  # less error.log |mark

$ cat logs.sh
cd /var/log/apache2
tail -f access.log error.log other_vhosts_access.log
$ ./logs.sh |grep -v notice |mark