Commands using ps (300)
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Look mah! All pipes
1ps ax | egrep "*.exe|*exe]" | awk '{ print $1 }' | xargs kill -
Same as previous but compatible with BSD/IPSO
1ps ewwo command PID | tr ' ' '\n' | grep \= -
It grabs the PID's top resource users with $(ps -eo pid,pmem,pcpu| sort -k 3 -r|grep -v PID|head -10) The sort -k is sorting by the third field which would be CPU. Change this to 2 and it will sort accordingly. The rest of the command is just using diff to display the output of 2 commands side-by-side (-y flag) I chose some good ones for ps. pidstat comes with the sysstat package(sar, mpstat, iostat, pidstat) so if you don't have it, you should. I might should take off the timestamp... :| Show Sample Output
1for i in $(ps -eo pid,pmem,pcpu| sort -k 3 -r|grep -v PID|head -10|awk '{print $1}');do diff -yw <(pidstat -p $i|grep -v Linux) <(ps -o euser,pri,psr,pmem,stat -p $i|tail);done -
This one liner is to kill all google chrome tabs. This works similar to $ killall firefox command which is to kill all firefox processes.
1for i in $(ps x | grep chrome | cut -d"?" -f1 | grep -v chrome); do kill -9 $i ; done -
When you 'ps|grep' for a given process, it turns out that grep itself appears as a valid line since it contains the RE/name you are looking for. To avoid grep from showing itself, simply insert some wildcard into process' name.
1ps afx|grep [a]pache -
Some IO intensive process make the system unresponsive. This function periodically starts/stops a process, which hopefully releases some resources for other activities. This function is useful when ionice is not available Show Sample Output
1slow () { [ -n $1 ] && while ps -p $1 >/dev/null ; do kill -STOP $1; sleep 1; kill -CONT $1; sleep 1; done & } -
This command will list the PID, VEID, and Name of the 10 highest cpu using processes on a openvz host. You must have vzpid installed. Show Sample Output
1ps -e h -o pid --sort -pcpu | head -10 | vzpid - -
Lots of fun to run on nfs clients when the server or network connection is having issues
1ps aux | awk '{if ($8 ~ "D") print $0}' -
1ps -fu $USER | awk {'print $2'} | xargs kill [-9]
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This version also attaches to new processes forked by the parent apache process. That way you can trace all current and *future* apache processes.
1ps auxw | grep sbin/apache | awk '{print"-p " $2}' | xargs strace -f -
1ps aux | awk '/chrome/ {s+=$6}END{print s/1024}';
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grep по ps aux
1ps aux | grep $(echo $1 | sed "s/^\(.\)/[\1]/g") -
If you have ever been trying to look for a list of processes based on their elapsed time you don't need to look any further. This command lets you find the list of processes ordered in a reversed order (oldest at the top) that have been running for over an hour on your system. Any system processes are filtered out, leaving only user initiated ones in. I find it extremely useful for debugging and performance analysis. Show Sample Output
1ps -eo etime,pid,pcpu,ppid,args | sed -e '/\[.\+\]/d' -e '/^[ \t]*[0-9]\{2\}:[0-9]\{2\} /d' | sort -k1r -
1docker kill $(docker ps -q)
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This checks the system load every second and if it's over a certain threshold (.8 in this example), it spits out the date, system loads and top 4 processes sorted by CPU. Additionally, the \a in the first echo creates an audible bell.
1while sleep 1; do if [ $(echo "$(cat /proc/loadavg | cut -d' ' -f1) > .8 " | bc) -gt 0 ]; then echo -e "\n\a"$(date)" \e[5m"$(cat /proc/loadavg)"\e[0m"; ps aux --sort=-%cpu|head -n 5; fi; done -
1for line in `docker ps | awk '{print $1}' | grep -v CONTAINER`; do docker ps | grep $line | awk '{printf $NF" "}' && echo $(( `cat /sys/fs/cgroup/memory/system.slice/docker-$line*/memory.usage_in_bytes` / 1024 / 1024 ))MB ; done
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1dockexecl() { docker exec -i -t $(docker ps -l -q) bash ;}
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1docker inspect --format "{{ .Name }} # {{ .NetworkSettings.IPAddress }} # {{ .NetworkSettings.Ports }}" $(docker ps -q) | tr -s '#' '\t'
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No need for sort Show Sample Output
1ps hax -o user --sort user | uniq -c -
1ps aux | awk '{if ($8 ~ "D") print $0}'
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1ps aux | awk '{print $2, $4, $11}' | sort -k2rn | head -n 10
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apt-get install cpulimit
1ps auxf | grep -v grep | grep -E -i "java|kibana" | awk {'print $2'} | while read pid; do cpulimit -l 25 -b -p $pid > /tmp/cpulimit_$pid ;done -
Also ignoring "sshd" server is necessary since you should not kill ssh server processes.
1ps aux | grep ssh | grep -v grep | grep -v sshd | awk {'print $2'} | xargs -r kill -9 -
Sometimes we install programs, we forget about them, and they stay there wasting RAM. This one-liner try to find them. Show Sample Output
1ps -eo cmd | awk '{print $1}'| sort -u | grep "^/" | xargs dpkg -S 2>/dev/null | awk -F: '{print $1}' | sort -u | xargs apt-mark showmanual -
1mem() { ps -C "$1" -O rss | awk '{ count ++; sum += $2 }; END {count --; print "Number of processes:\t",count; print "Mem. usage per process:\t",sum/1024/count, "MB"; print "Total memory usage:\t", sum/1024, "MB" ;};'; }
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