我试图在特定行之前插入几行文本,但在尝试添加新行字符时不断出现sed错误。我的命令如下:
sed: -e expression #1, char 77: unterminated `s' command
报告的错误是:
\n
我尝试过,使用\\
,sed -r -i -e '/Line to insert after/ i Line one to insert'
-e 'second new line to insert'
-e 'third new line to insert' /etc/directory/somefile.txt
(如示例所示),根本没有字符,只是将第二行移动到下一行。我也尝试过这样的事情:
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
编辑!:道歉,我希望在现有文本之前插入文本,而不是之后!
答案 0 :(得分:10)
这应该有效:
sed -i '/Line to insert after/ i Line one to insert \
second new line to insert \
third new line to insert' file
答案 1 :(得分:6)
除了单独行上的简单替换之外,为了简单,清晰,健壮等等,使用awk而不是sed。
在一行之前插入:
awk '
/Line to insert before/ {
print "Line one to insert"
print "second new line to insert"
print "third new line to insert"
}
{ print }
' /etc/directory/somefile.txt
在一行之后插入:
awk '
{ print }
/Line to insert after/ {
print "Line one to insert"
print "second new line to insert"
print "third new line to insert"
}
' /etc/directory/somefile.txt
答案 2 :(得分:1)
当要插入的行是某些命令“ mycmd”的结果(例如cat results.txt
或printf "%s\n" line{1..3}
)时,您可以
sed -i 's/Line to insert after/r' <(cmd) file
or
sed -i 's/Line to insert after/echo "&";cmd/e' file
如果要在匹配项之前插入,可以简单地修改最后一个命令。
答案 3 :(得分:0)
sed -i '/Line to insert after/ i\
Line one to insert\
second new line to insert\
third new line to insert' /etc/directory/somefile.txt
答案 4 :(得分:0)
此ll从第一行起作用。例如:如果要从文件的第3行插入,请将“1i”替换为“3i”。
sed -i '1i line1'\\n'line2'\\n'line3' 1.txt
cat 1.txt
line1
line2
line3
Hai
答案 5 :(得分:0)
为了符合POSIX并在OS X中运行,我使用了以下内容(单引号行和空行用于演示目的):
sed -i "" "/[pattern]/i\\
line 1\\
line 2\\
\'line 3 with single quotes\`
\\
" <filename>
答案 6 :(得分:0)
这也可以通过Perl轻松完成
$ cat MeanwhileInHell.txt
Iran|XXXXXX|Iranian
Iraq|YYYYYY|Iraquian
Saudi|ZZZZZ|Saudi is a Rich Country
USA|AAAAAA|USA is United States of America.
India|IIII|India got freedom from British.
Scot|SSSSS|Canada Mexio.
$ perl -pe 'BEGIN {$x="Line one to insert\nLine 2\nLine3\n"} $_=$x.$_ if /USA/ ' MeanwhileInHell.txt
Iran|XXXXXX|Iranian
Iraq|YYYYYY|Iraquian
Saudi|ZZZZZ|Saudi is a Rich Country
Line one to insert
Line 2
Line3
USA|AAAAAA|USA is United States of America.
India|IIII|India got freedom from British.
Scot|SSSSS|Canada Mexio.
$
答案 7 :(得分:0)
在MacO上,我还需要一些其他东西。
i
之后的双反斜杠-i
后加空引号以指定没有备份文件此代码在pom.xml中搜索</plugins
的第一个实例,并在其前面插入另一个XML对象,并用换行符分隔。
sed -i '' "/\<\/plugins/ i \\
\ <plugin>\\
\ <groupId>org.apache.maven.plugins</groupId>\\
\ <artifactId>maven-source-plugin</artifactId>\\
\ <executions>\\
\ <execution>\\
\ <id>attach-sources</id>\\
\ <goals>\\
\ <goal>jar</goal>\\
\ </goals>\\
\ </execution>\\
\ </executions>\\
\ </plugin>\\
" pom.xml