Как текст GPG о Unity?

Я сделал скрипт, который делает это:

#!/bin/bash

# File path to watch
LOCK_FILE='/var/lib/dpkg/lock'

# tput escape codes
cr="$(tput cr)"
clr_end="$(tput el)"
up_line="$(tput cuu 1)"

CLEAN(){
    # Cleans the last two lines of terminal output,
    # returns the cursor to the start of the first line
    # and exits with the specified value if not False

    echo -n "$cr$clr_end"
    echo
    echo -n "$cr$clr_end$up_line"
    if [[ ! "$1" == "False" ]]; then
        exit $1
    fi
}

_get_cmdline(){
    # Takes the LOCKED variable, expected to be output from `lsof`,
    # then gets the PID and command line from `/proc/$pid/cmdline`.
    #
    # It sets `$open_program` to a user friendly string of the above.

    pid="${LOCKED#p}"
    pid=`echo $pid | sed 's/[\n\r ].*//'`
    cmdline=()
    while IFS= read -d '' -r arg; do
        cmdline+=("$arg")
    done < "/proc/${pid}/cmdline"
    open_program="$pid : ${cmdline[@]}"
}

# Default starting value
i=0

# Checks if the file is locked, writing output to $FUSER
while LOCKED="$(lsof -F p "$LOCK_FILE" 2>/dev/null)" ; do
    # This will be true if it isn't the first run
    if [[ "$i" != 0 ]]; then
        case $(($i % 4)) in
            0 ) s='-'
                i=4
                _get_cmdline # Re-checks the command line each 4th iteration
            ;;
            1 ) s=\\ ;;
            2 ) s='|' ;;
            3 ) s='/' ;;
        esac
    else
        # Traps to clean up the printed text and cursor position
        trap "CLEAN False; trap - SIGINT ; kill -SIGINT $$" SIGINT
        trap 'CLEAN $((128+15))' SIGTERM
        trap 'CLEAN $((128+1))' SIGHUP
        trap 'CLEAN $((128+3))' SIGQUIT

        # Default starting character
        s='-'

        _get_cmdline
        echo -n "$save_cur"
    fi
    # Prints the 2nd line first so the cursor is at the end of the 1st line (looks nicer)
    echo
    echo -n "$cr$clr_end$open_program"
    echo -n "$up_line$res_cur$cr$clr_end[$s] Waiting for other package managers to finish..."
    #echo -en "$cr$clr_end[$s] Waiting for other package managers to finish..."
    #echo -en "\n$cr$clr_end$open_program$cr$up_line"
    ((i++))
    sleep 0.025
done

CLEAN False

# This allows saving the script under a different name (e.g. `apt-wait`)
# and running it. It only imitates `apt-get` if it was launched as such
if [[ "${0##*/}" == 'apt-get' ]]; then
    exec /usr/bin/apt-get "$@"
    exit $?
fi

Сохраните это в /usr/local/sbin/apt-get. apt-get будет ждать, если другой экземпляр уже запущен.

В качестве альтернативы сохраните его как /usr/local/sbin/apt-wait, пример использования:

apt-wait && aptitude

, который будет запускать aptitude после текущий запуск процесса блокировки завершен.

$ sudo apt-get remove some_package

$ sudo apt-get install some_other_package

[/] Waiting for other package managers to finish...
      28223 : /usr/bin/apt-get remove some_package