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add sed

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remove lines
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onceupon
2017-10-02 10:38:44 +08:00
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parent 55e4c097c7
commit e43853e465
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@@ -142,6 +142,16 @@ http://www.cyberciti.biz/faq/grep-regular-expressions/
## Sed ## Sed
[[back to top](#handy-bash-oneliner-commands-for-tsv-file-editing)] [[back to top](#handy-bash-oneliner-commands-for-tsv-file-editing)]
##### Remove the 1st line
```bash
sed 1d filename
```
##### Remove the 100 lines (remove line 1-100)
```bash
sed 1,100d filename
```
##### Remove lines with word (e.g. bbo) ##### Remove lines with word (e.g. bbo)
```bash ```bash
@@ -163,7 +173,7 @@ sed "1i >$i"
//'1i' means insert to first line //'1i' means insert to first line
##### Delete empty lines ##### Delete/remove empty lines
```bash ```bash
sed '/^\s*$/d' sed '/^\s*$/d'
@@ -173,13 +183,13 @@ or
```bash ```bash
sed 's/^$/d' sed 's/^$/d'
``` ```
##### Delete last line ##### Delete/remove last line
```bash ```bash
sed '$d' sed '$d'
``` ```
##### Delete last character from end of file ##### Delete/remove last character from end of file
```bash ```bash
sed -i '$ s/.$//' filename sed -i '$ s/.$//' filename
``` ```