Question

我有一个单词word1 word2 word3列表，我想从文件file.txt中删除它。我怎么能用终端做到这一点。

Answer 1

 cat file.txt | sed "s/word1//g" | sed "s/word2//g"

如果要将内容写入新文件，请执行以下操作：

 cat file.txt | sed "s/word1//g" | sed "s/word2//g" > newfile.txt

Answer 2

假设：

只应对整个字进行替换，而不仅仅是任何子字符串。
替换应该就地 - 即结果应该写回输入文件。

GNU sed（改编自@ jaypal＆＃39;）

sed -r -i 's/\b(word1|word2|word3)\b//g' file.txt

FreeBSD / OSX sed：

sed -E -i '' 's/[[:<:]](word1|word2|word3)[[:>:]]//g' file.txt

搜索词的变体解决方案可以是彼此的子串：

# Array of sample search words.
words=( 'arrest' 'arrested' 'word3' )

# Sort them in reverse order and build up a list of alternatives
# for use with `sed` later ('word3|arrested|arrest').
# Note how the longer words among words that are substrings of
# each other come before the shorter ones.
reverseSortedAlternativesList=$(printf '%s\n' "${words[@]}" | sort -r  | tr '\n' '|')
# Remove the trailing '|'.
reverseSortedAlternativesList=${reverseSortedAlternativesList%|}

# GNU sed:
sed -r -i 's/\b('"$reverseSortedAlternativesList"')\b//g' file.txt

# FreeBSD/OSX sed:
sed -E -i '' 's/[[:<:]]('"$reverseSortedAlternativesList"')[[:>:]]//g' file.txt

使用终端从文件中删除多个单词

2 个答案: