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README.md - minor fixes and updates

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- signed-off-by: trimstray <trimstray@gmail.com>
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trimstray 2018-07-11 14:43:39 +02:00
parent c7a0210c14
commit 93d83a4ab2
1 changed files with 7 additions and 1 deletions
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@ -331,7 +331,7 @@ true && { echo success;} || { echo failed; }
some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr) some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)
``` ```
###### Pipe stdout and stderr to separate commands ###### Redirect stdout and stderr each to separate files and print both to the screen
```bash ```bash
(some_command 2>&1 1>&3 | tee errorlog ) 3>&1 1>&2 | tee stdoutlog (some_command 2>&1 1>&3 | tee errorlog ) 3>&1 1>&2 | tee stdoutlog
@ -343,6 +343,12 @@ some_command > >(/bin/cmd_for_stdout) 2> >(/bin/cmd_for_stderr)
history | awk '{ a[$2]++ } END { for(i in a) { print a[i] " " i } }' | sort -rn | head history | awk '{ a[$2]++ } END { for(i in a) { print a[i] " " i } }' | sort -rn | head
``` ```
###### Empty a file (truncate to 0 size)
```bash
>filename
```
###### Quickly backup a file ###### Quickly backup a file
```bash ```bash