This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Last revision Both sides next revision | ||
|
linux-commandline-tips [2016/12/17 01:18] serbizadmin |
linux-commandline-tips [2020/07/15 09:29] serbizadmin [Compression] |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| - | | + | ~~NOTOC~~ |
| - | fdupes --recurse dir1/ dir2/ | + | ====== Find Stuff====== |
| - | * find a word in a file | + | |
| - | grep -rnw . -e "Blearn" | + | < |
| + | fdupes --recurse dir1/ dir2/ </ | ||
| + | * find a **word** in a file | ||
| + | < | ||
| + | grep -rnw '/ | ||
| + | * find all **socket** files your system runs | ||
| + | < | ||
| + | find / -type s | ||
| + | </ | ||
| + | * find the latest file in a folder/ | ||
| + | < | ||
| + | find . -type f -printf '%T@ %P\n' | sort -n | awk ' | ||
| + | </ | ||
| + | ====== Differences====== | ||
| + | * between files, showing side by side | ||
| + | < | ||
| + | diff -y file1 file2 | less | ||
| + | </ | ||
| + | * differences of files between directories | ||
| + | < | ||
| + | diff <(ls -a /dir1/) <(ls -a /dir 2/) | ||
| + | </ | ||
| + | or compare | ||
| + | < | ||
| + | comm <(ls -a /dir/) <(ls -a /dir2/) | ||
| + | </ | ||
| + | \\ | ||
| + | ====== Maintenance====== | ||
| + | * kill a process wholesale | ||
| + | < | ||
| + | kill $(ps aux | grep " | ||
| + | * trim log. example: | ||
| + | < | ||
| + | cat /dev/null > modsec_audit.log</ | ||
| + | See also "log rotate" | ||
| + | * remove everything else except... | ||
| + | < | ||
| + | rm -rf !(filename)</ | ||
| + | This works only if extglob is enabled. So | ||
| + | < | ||
| + | shopt -s extglob</ | ||
| + | \\ | ||
| + | ====== Compression====== | ||
| + | * lossless, multi-thread compression: | ||
| + | < | ||
| + | time xz -6ve -k --threads=0 < | ||
| + | </ | ||
| + | * compress multiple files | ||
| + | < | ||
| + | xz file1.txt file2.txt file3.txt | ||
| + | </ | ||
| + | * decompress | ||
| + | < | ||
| + | xz -d file.txt.xz | ||
| + | unxz file.txt.xz | ||
| + | </ | ||
| + | * test integrity | ||
| + | < | ||
| + | xz -tv < | ||
| + | </ | ||
| + | * concatenate multiple files | ||
| + | < | ||
| + | xzip -c file1.txt > files.xz | ||
| + | xzip -c file2.txt >> files.xz | ||
| + | </ | ||
| + | * concatenate, | ||
| + | < | ||
| + | xzcat test.txt.xz | ||
| + | | ||
| + | | ||
| + | | ||
| + | xzgrep exa test.txt.xz | ||
| + | | ||
| + | </ | ||
| + | |||
| + | ====== PHP====== | ||
| + | * View php config | ||
| + | < | ||
| + | php -r "print phpinfo();" | ||
| + | </ | ||
| + | or | ||
| + | < | ||
| + | php -i | grep in | ||
| + | </ | ||
| + | \\ | ||
| + | * reinstall all php packages | ||
| + | < | ||
| + | apt-get install --reinstall `dpkg -l | grep ' | ||
| + | </ | ||
| + | ====== Log Analysis====== | ||
| + | * limiting by date range | ||
| + | |||
| + | sed -n '/ | ||