128 lines
3.0 KiB
Markdown
128 lines
3.0 KiB
Markdown
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---
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title: お仕事で覚えたシェルスクリプトの使い方
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author: kazu634
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date: 2013-07-20
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url: /2013/07/20/shell_scripting_know-how_001/
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geo_latitude:
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- 38.306231
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geo_longitude:
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- 141.022696
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geo_public:
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- 1
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wordtwit_posted_tweets:
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- 'a:1:{i:0;i:1851;}'
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wordtwit_post_info:
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- 'O:8:"stdClass":13:{s:6:"manual";b:0;s:11:"tweet_times";s:1:"1";s:5:"delay";s:1:"0";s:7:"enabled";s:1:"1";s:10:"separation";i:60;s:7:"version";s:3:"3.7";s:14:"tweet_template";b:0;s:6:"status";i:2;s:6:"result";a:0:{}s:13:"tweet_counter";i:2;s:13:"tweet_log_ids";a:1:{i:0;i:1851;}s:9:"hash_tags";a:0:{}s:8:"accounts";a:1:{i:0;s:7:"kazu634";}}'
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categories:
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- シェルスクリプト
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---
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## sedコマンドでA行目からB行目を切り出す
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以下のように実行してあげるよ:
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`sed -n 'A,Bp' /path/to/file`
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実行例はこんな感じです:
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```
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kazu634@macbook% cat -n /etc/hosts
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1 ##
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2 # Host Database
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3 #
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4 # localhost is used to configure the loopback interface
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5 # when the system is booting. Do not change this entry.
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6 ##
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7 127.0.0.1 localhost
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8 255.255.255.255 broadcasthost
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9 ::1 localhost
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10 fe80::1%lo0 localhost
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11
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12 59.106.177.26 sakura-vps
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13 133.242.151.82 sakura-vps2
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14
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15 192.168.3.4 esxi
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16 192.168.3.5 freenas
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17 192.168.3.100 vyatta
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kazu634@macbook% sed -n '1,8p' /etc/hosts
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##
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# Host Database
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#
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# localhost is used to configure the loopback interface
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# when the system is booting. Do not change this entry.
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##
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127.0.0.1 localhost
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255.255.255.255 broadcasthost
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```
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## sedコマンドでA行目から最終行までを切り出す
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以下のように実行してあげるよ:
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`sed -n 'A,$p' /path/to/file`
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実行例はこんな感じです:
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```
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kazu634@macbook% sed -n '7,$p' /etc/hosts
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127.0.0.1 localhost
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255.255.255.255 broadcasthost
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::1 localhost
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fe80::1%lo0 localhost
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59.106.177.26 sakura-vps
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133.242.151.82 sakura-vps2
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192.168.3.4 esxi
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192.168.3.5 freenas
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192.168.3.100 vyatta
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```
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## 空ファイルの削除
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以下のように実行してあげるよ:
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`find /path/to/root-dir -type f -empty | xargs rm`
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## 空ディレクトリの削除
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以下のように実行してあげるよ:
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`find /path/to/root-dir -type d | xargs rmdir`
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もしかすると`sort`を間に挟めるともっといいのかも。
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## grepコマンドでPerl互換の正規表現をつかう
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-P オプションを指定する！
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## grepコマンドでパターンにマッチするファイル名のみを表示する
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-l オプションを指定する！
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## sedで空行を削除
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`sed '/^$/d' /path/to/file`
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実行例はこんな感じです:
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```
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kazu634@macbook% sed '/^$/d' /etc/hosts
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##
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# Host Database
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#
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# localhost is used to configure the loopback interface
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# when the system is booting. Do not change this entry.
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##
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127.0.0.1 localhost
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255.255.255.255 broadcasthost
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::1 localhost
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fe80::1%lo0 localhost
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59.106.177.26 sakura-vps
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133.242.151.82 sakura-vps2
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192.168.3.4 esxi
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192.168.3.5 freenas
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192.168.3.100 vyatta
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```
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