Linux Terminal Command Tips

terminal-tips.md

List how much RAM consumed by each process

ps -eo rss,pid,user,command --sort -size | \
awk '{ hr=$1/1024 ; printf("%13.2f Mb ",hr) } { for ( x=4 ; x<=NF ; x++ ) { printf("%s ",$x) } print "" }' | \
egrep -v 0.00

One line

ps -eo rss,pid,user,command --sort -size | awk '{ hr=$1/1024 ; printf("%13.2f Mb ",hr) } { for ( x=4 ; x<=NF ; x++ ) { printf("%s ",$x) } print "" }' | egrep -v 0.00

rsync using non standard port

rsync -arvz -e 'ssh -p <port>' --progress SRC DST

Search php code vulnerability

// list file with datetime (-l = list only filename)
grep --include=*.php -rl 'eval(' . | xargs ls -lt
// List owner and group is www-data
grep --include=*.php -lr 'eval(' . | xargs ls -lt | grep -E 'www\-data\s+www\-data'

Some pattern can be used: phpinfo, assert(, shell_exec(, system(, exec(, popen(, passthru(, proc_open(, pcntl_exec(

How do I list all cron jobs for all users?

for user in $(cut -f1 -d: /etc/passwd); do crontab -u $user -l; done

Edit if you want to know which user a crontab belongs to, use echo $user

for user in $(cut -f1 -d: /etc/passwd); do echo $user; crontab -u $user -l; done