Linux/Parsing: Difference between revisions
< Linux
No edit summary |
m (→chars) |
||
| (6 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
== lines == | == lines == | ||
* grep | * grep | ||
<blockquote> | |||
<pre> | |||
grep -v ^$ # remove empty lines | |||
</pre> | |||
</blockquote> | |||
* tail | * tail | ||
<blockquote> | <blockquote> | ||
| Line 10: | Line 16: | ||
</pre> | </pre> | ||
</blockquote> | </blockquote> | ||
* | * wc | ||
<blockquote> | |||
<pre> | |||
wc -l # count lines | |||
</pre> | |||
</blockquote> | |||
== chars == | |||
* cut<syntaxhighlight lang="bash"> | |||
uname -a | |||
-> Linux nutzer-laptop 3.2.0-030200-generic #201201042035 SMP Thu Jan 5 01:36:31 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux | |||
uname -a | cut -d" " -f1,3,12 | |||
-> Linux 3.2.0-030200-generic x86_64 | |||
</syntaxhighlight> | |||
* tr | |||
= | * parameter expansion | ||
<syntaxhighlight lang="bash"> | |||
</syntaxhighlight> | |||
== directories and files == | |||
* basename | |||
== sed & awk == | == sed & awk == | ||
Latest revision as of 16:24, 24 November 2020
lines
- grep
grep -v ^$ # remove empty lines
- tail
tail tail -f # follow tail -n 10 # last 10 lines tail +3 # skip first 3 lines
- wc
wc -l # count lines
chars
- cut
uname -a -> Linux nutzer-laptop 3.2.0-030200-generic #201201042035 SMP Thu Jan 5 01:36:31 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux uname -a | cut -d" " -f1,3,12 -> Linux 3.2.0-030200-generic x86_64
- tr
- parameter expansion
directories and files
- basename
sed & awk
- sed + control characters
sed 's/\x00/controlcharwashere/g'
sed -n '/Iowa/,/Montana/p'
other
- slowing output
cat incoming.log | pv -qL 1000 | tee temp
- show as hex
od -t x1 -An