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1 .. -*- coding: utf-8; -*- |
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2 |
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3 ======= |
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4 Bash. |
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5 ======= |
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6 |
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7 How override PS1, PS2? |
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8 ====================== |
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9 |
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10 When loading bash read ~/.bash_profile and ~/.bashrc. |
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11 |
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12 Put at end of these files:: |
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13 |
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14 PS1='\u@\H$ ' |
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15 |
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16 When xterm start bash - it start as non-login. So ~/.bash_profile and ~/.bashrc |
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17 didn't read. To workaround this use:: |
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18 |
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19 $ xterm -e bash -i -c "mc -x" |
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20 |
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21 That make bash interactive and init file was readed. |
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22 |
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23 Command history. |
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24 ================ |
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25 |
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26 Bash allow accessing to command that you type previously. There are several |
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27 options to control command history behavior. Set corresponding variables in |
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28 your ~/.bashrc file (which is read by interactive shell):: |
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29 |
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30 # ignorespace do not save lines that start with space |
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31 # erasedups all previous lines matching the current line to be removed from |
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32 # the history list before that line is saved |
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33 export HISTCONTROL=igrorespace:erasedups |
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34 export HISTIGNORE=" ?cd *":"e *":"sudo mv *":"sudo rm *":"sudo cp *":"sudo mkdir *":"sudo chmod *":"sudo chown *":ls:pwd:"vlc*" |
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35 |
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36 There are another options, with default values (which satisfy my needs, so |
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37 I don't put they to ~/.bashrc):: |
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38 |
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39 export HISTFILE=~/.bash_history # where is command history stored |
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40 export HISTFILESIZE=500 # how many lines been in $HISTFILE |
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41 export HISTSIZE=500 # how many lines been stored in bash process |
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42 |
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43 mc (GNU Midnight Commander). |
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44 ---------------------------- |
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45 |
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46 You can also set special history rules for mc subshell in ~/.mc/bashrc file. |
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47 |
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48 Bash history. |
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49 ============= |
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50 |
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51 http://wiki.bash-hackers.org/scripting/bashchanges |
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52 This article is an incomplete overview of changes to Bash over |
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53 the time. |
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54 |
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55 |