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потоковый_редактор_sed
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| - | ====== Потоковый редактор sed ====== | ||
| - | ===== Шаблон ===== | ||
| - | sed команды_редактирования [имя_файла] | ||
| - | <code> | ||
| - | $ sed '' /etc/passwd | ||
| - | $ sed -n '' /etc/passwd | ||
| - | </code> | ||
| - | ===== Команда редактирования -- p -- печать текста ===== | ||
| - | <code> | ||
| - | $ sed -n '1p' /etc/passwd | ||
| - | # $FreeBSD: src/etc/master.passwd,v 1.39 2004/08/01 21:33:47 markm Exp $ | ||
| - | |||
| - | $ sed -n '20,$p' /etc/passwd | ||
| - | pop:*:68:6:Post Office Owner:/nonexistent:/usr/sbin/nologin | ||
| - | www:*:80:80:World Wide Web Owner:/nonexistent:/usr/sbin/nologin | ||
| - | nobody:*:65534:65534:Unprivileged user:/nonexistent:/usr/sbin/nologin | ||
| - | </code> | ||
| - | ===== Команда редактирования -- a -- вставка после и -- i -- перед строкой ===== | ||
| - | <code> | ||
| - | who | sed '1i\ | ||
| - | Name Tty Date | ||
| - | ' | ||
| - | |||
| - | $ who | sed '/root/a\ | ||
| - | SUPER USER | ||
| - | ' | ||
| - | </code> | ||
| - | |||
| - | ===== Команда редактирования -- c -- замена строк ===== | ||
| - | <code> | ||
| - | $ cat /etc/defaults/rc.conf | sed '/^#/c\ | ||
| - | COMMENT | ||
| - | ' | ||
| - | </code> | ||
| - | ===== Команда редактирования -- d -- удаление текста ===== | ||
| - | <code> | ||
| - | $ sed '2,$d' /etc/passwd | ||
| - | # $FreeBSD: src/etc/master.passwd,v 1.39 2004/08/01 21:33:47 markm Exp $ | ||
| - | |||
| - | $ sed -e '/^$/d' -e '/^#/d' /etc/defaults/rc.conf | ||
| - | </code> | ||
| - | ===== Команда редактирования -- s -- замена элементов текста ===== | ||
| - | <code> | ||
| - | $ sed 's/root/SUPERUSER/' /etc/passwd | ||
| - | # $FreeBSD: src/etc/master.passwd,v 1.39 2004/08/01 21:33:47 markm Exp $ | ||
| - | # | ||
| - | SUPERUSER:*:0:0:Charlie &:/root:/bin/csh | ||
| - | toor:*:0:0:Bourne-again Superuser:/SUPERUSER: | ||
| - | ... | ||
| - | |||
| - | $ sed 's/root/SUPERUSER/g' /etc/passwd | ||
| - | # $FreeBSD: src/etc/master.passwd,v 1.39 2004/08/01 21:33:47 markm Exp $ | ||
| - | # | ||
| - | SUPERUSER:*:0:0:Charlie &:/SUPERUSER:/bin/csh | ||
| - | toor:*:0:0:Bourne-again Superuser:/SUPERUSER: | ||
| - | |||
| - | $ sed -E '/(^$)|(^#)/d' /etc/defaults/rc.conf | ||
| - | |||
| - | $ sed -E 's/(^u[0123456789]+)/\1user/' /etc/passwd | ||
| - | или | ||
| - | $ sed -E 's/(^u[[:digit:]]+)/\1user/' /etc/passwd | ||
| - | </code> | ||
| - | ===== Аргумент -- i – непосредственное редактирование файла ===== | ||
| - | <code> | ||
| - | $ cp /etc/passwd ~ | ||
| - | $ cd | ||
| - | $ sed –i .bak -E 's/(r.*t)/\1SUPERUSER/g' passwd | ||
| - | </code> | ||
потоковый_редактор_sed.1298618893.txt.gz · Last modified: 2013/05/22 13:50 (external edit)
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