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linux:bash:start [2026/06/11 14:24] – titannetlinux:bash:start [2026/06/11 16:11] (current) – titannet
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 ====== Headline ====== ====== Headline ======
  
-| tar -tvf | List with details | +| ''tar -tvf'' | List with details | 
-| tar czf data.tar.gz <folder/files> | compress file | +| ''tar czf data.tar.gz <folder/files>'' | compress file | 
-| tar -cjf archive.tar.bz2 file1 | compress with bzip2 | +| ''tar -cjf archive.tar.bz2 <folder/files>'' | compress with bzip2 | 
-| tar xzf data.tar.gz | decompress file |  +| ''tar -xzf data.tar.gz'' | decompress file |  
-| tar -rvf archive.tar newfile | append to file |+| ''tar -rvf archive.tar newfile'' | append to file |
  
  
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 | visidata | search tabular/log files | | visidata | search tabular/log files |
 +
 +
 +
 +===== Log analysis =====
 +
 +<source bash>
 +<nowiki>
 +sudo awk '{print $1" "$2" "$3, $4, $5, substr($0, index($0,$6))}' /var/log/auth.log | jq -R -c 'split(" ") | {timestamp: (.[0]+" "+.[1]+" "+.[2]), hostname: .[3], process: .[4], message: .[5:] | join(" ")}' > auth.json
 +</nowiki>
 +</source>