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<title>2.5.2. Bash</title>
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<a href="index.html">GNU/Linux Index</a>
<h1 id="bash">2.5.2. Bash</h1>
<p>Just to be sure, setup bash as default login;<p>
<pre>
$ chsh
</pre>
<p>Description of configuration files;</p>
<dl>
<dt>~/.bash_profile</dt>
<dd>Minimal file that just load .profile and then .bashrc,
in this order.</dd>
<dt>~/.profile<dt>
<dd>Not specifically related to bash, such as
environment variables (PATH). Only for login shells (sh)
or graphical applications.</dd>
<dt>~/.bashrc</dt>
<dd>Related to interactive command line, such as bash
alias, editor.</dd>
</dl>
<h2 id="profile">2.5.2.1. Profile</h2>
<p>Example of ~/.profile;</p>
<pre>
export GPG_AGENT_INFO # the env file does not contain the export statement
export SSH_AUTH_SOCK # enable gpg-agent for ssh
export GPGKEY=XXXXXXXX
# ssh-agent to ask only ounce for password
SSH_ENV="$HOME/.ssh/environment"
function start_agent {
echo "Initialising new SSH agent..."
/usr/bin/ssh-agent | sed 's/^echo/#echo/' > "${SSH_ENV}"
echo succeeded
chmod 600 "${SSH_ENV}"
. "${SSH_ENV}" > /dev/null
/usr/bin/ssh-add;
}
# Source SSH settings, if applicable
if [ -f "${SSH_ENV}" ]; then
. "${SSH_ENV}" > /dev/null
#ps ${SSH_AGENT_PID} doesn't work under cywgin
ps -ef | grep ${SSH_AGENT_PID} | grep ssh-agent$ > /dev/null || {
start_agent;
}
else
start_agent;
fi
# Weston
if test -z "${XDG_RUNTIME_DIR}"; then
export XDG_RUNTIME_DIR=/tmp/${UID}-runtime-dir
if ! test -d "${XDG_RUNTIME_DIR}"; then
mkdir "${XDG_RUNTIME_DIR}"
chmod 0700 "${XDG_RUNTIME_DIR}"
fi
fi </pre>
<h2 id="bashrc">2.5.2.2. Bash RC</h2>
<p>Example of ~/.bashrc;</p>
<pre>
# If not running interactively, don't do anything
case $- in
*i*) ;;
*) return;;
esac
# check the window size after each command and, if necessary,
# update the values of LINES and COLUMNS.
shopt -s checkwinsize
# don't put duplicate lines or lines starting with space in the history.
# See bash(1) for more options
HISTCONTROL=ignoreboth
# append to the history file, don't overwrite it
shopt -s histappend
# for setting history length see HISTSIZE and HISTFILESIZE in bash(1)
HISTSIZE=1000
HISTFILESIZE=2000
alias tmux="tmux -2"
alias rm='rm -i'
#alias cp='cp -i'
alias mv='mv -i'
# Prevents accidentally clobbering files.
alias mkdir='mkdir -p'
alias h='history'
alias j='jobs -l'
alias which='type -a'
alias ..='cd ..'
# Generate a password
genpasswd () {
local l=$1
[ "$l" == "" ] && l=20
tr -dc A-Za-z0-9_ < /dev/urandom | head -c ${l} | xargs
}
# Git graph log
glog () {
git log --graph --abbrev-commit --decorate --date=relative --all
}
if [[ -z "$TMUX" ]] ;then
ID="`tmux ls | grep -vm1 attached | cut -d: -f1`" # get the id of a deattached session
if [[ -z "$ID" ]] ;then # if not available create a new one
tmux new-session
else
tmux attach-session -t "$ID" # if available attach to it
fi
fi
</pre>
<h2 id="bash_profile">2.5.2.3. Bash profile</h2>
<p>Example of ~/.bash_profile;</p>
<pre>
#!/bin/bash
if [ -f ~/.profile ]; then
source ~/.profile
fi
if [ -f ~/.bashrc ]; then
source ~/.bashrc
fi
</pre>
<a href="index.html">GNU/Linux Index</a>
<p>
This is part of the LeetIO System Documentation.
Copyright (C) 2021
LeetIO Team.
See the file <a href="../fdl-1.3-standalone.html">Gnu Free Documentation License</a>
for copying conditions.</p>
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