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实体书 tools under Linux
实体书 tools under Linux
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tools/cmd under Linux
some handy tools or commands are recorded at here for fast reference：
- stress processor：
× for i in 1 2 3 4; do while : ; do : ; done & done - average
× awk '{sum+=$1} END {print "Average = ", sum/NR}' - loop 5/n times
× for i in {1..5}; do echo "Welcome $i times"; done - downgrade a rpm package
rpm -Uvh --oldpackage xxx
- stress processor：
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Convert WebP to PNG
list=$(ls *.webp)
for file in ${list}
do
dwebp ${file} -o ${file}.pngdone