Commands tagged Linux (266)
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There is a huge number of supported "languages" to which you can export your .fig figures to. See. 'man fig2dev' (http://linux.die.net/man/1/fig2dev).
0fig2dev -L eps file.fig file.eps -
This command is Linux compatible. It will prompt the user for a new password at next logon
0chage -d 0 -m 0 -M 60 [user] -
Find all files in /var/spool/mqueue older than 7 days, pass to perl to efficiently delete them (faster than xargs or -exec when you've got millions or hundreds of thousands to delete). Naturally the type, directory, and file age vars can be adjusted to meet your specific needs.
0find /var/spool/mqueue -type f -mtime +7 | perl -lne unlink -
0tr -d "\r" < dos.txt > linux.txt
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since awk was already there one can use it instead of the 2 greps. might not be faster, but fast enough
0apt-get remove $(dpkg -l | awk "/^ii linux-(image|headers)/ && ! /`uname -r`/ {print \$2}") -
after kernel build with make deb-pkg, I like to install the 4 newest packages that exist in the directory. Beware: might be fewer for you....
0sudo dpkg -i `ls -tr *.deb | tail -n4` -
Unmounts all CIFS-based network drives. Very nice for shutting down network mounts on a Linux laptop just prior to going to sleep. Show Sample Output
0for D in `mount -lt cifs | sed 's/.*on \(\/.\+\) type.*/\1/'`; do echo -n "UNMOUNTING $D..."; sudo umount $D; echo " [DONE]"; done; -
Assumes that the files are named in numerical order (ie. 01 Filename.mp3). It will set the track number as tracknumber/totaltracks (ie. 1/14). This will write both ID3v1 and ID3v2 tags. Note: This only writes the track numbers.
0x="1" && z="`ls -l * | wc -l`"; for y in *.mp3; do `id3v2 --TRCK "$x/$z" "$y"`; x=$[$x+1]; done -
You need to have figlet(for font) and cowsay installed then add it to your .bashrc file.You can see it every time after start a new session. Show Sample Output
0figlet -f $(ls /usr/share/figlet/fonts/*.flf | shuf -n1) namakukingkong | cowsay -n -f $(ls /usr/share/cows/ | shuf -n1) -
You need to have figlet(for font) and cowsay installed. Just copy n paste this command and you can see..... Show Sample Output
0watch -tn1 'figlet -f slant `date +%T` | cowsay -n -f telebears' -
0sudo ps aux --sort:rss | awk '{print $2"\t"$11": "$6/1024" MB"}' | column -t | less
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If you changed the default policy on any chain other than filter table chain's, this won't be enough.
0iptables -P INPUT ACCEPT; iptables -P FORWARD ACCEPT; iptables -P OUTPUT ACCEPT; for table in `cat /proc/net/ip_tables_names`; do iptables -t $table -F; iptables -t $table -Z; iptables -t $table -X; done -
This command displays the CPU idle + used time using stats from /proc/stat. Show Sample Output
0grep "cpu " /proc/stat | awk -F ' ' '{total = $2 + $3 + $4 + $5} END {print "idle \t used\n" $5*100/total "% " $2*100/total "%"}' -
Creates a single primary partition starting at sector 0 and extending to the end of the disk. Use with care.
0echo "0,,L" | sfdisk /dev/sdX -
When I do a major change in my entities, I want to find a way to find all my Entities names and create the commande for me. So instead of doing ls src/Your/OwnBundle... and then do it manually, this helps a lot. Show Sample Output
0find ./src -type d -name "Entity" | xargs ls -A | cut -d . -f1 | sed 's_^_app/console doctrine:generate:entities YourOwnBundleName:_' -
Sometimes you want to see all of the systcls for a given $thing. I happened to need to easily look at all of the vm sysctls between two boxes and compare them. This is what I came up with. Show Sample Output
0find /proc/sys/vm -maxdepth 1 -type f | while read i ; do printf "%-35s\t%s\n" "$i" "$(<$i)" ; done | sort -t/ -k4 -
Daemontools[1] won't always properly reap it's children. Sometimes when you need to kill the main svscan process, you want to also clean up all of it's children. The way to do that is to send a signal to the entire process group. It is a bit tricky [1] http://cr.yp.to/daemontools.html
0kill -9 -$(ps x -o "%c %r" | awk '/svscan/{print $2}') -
Disabling an interface's multicast filter is like disabling IGMP snooping on a switch. It is useful for testing and troubleshooting.
0ifconfig eth0 allmulti -
0awk '{if ($NF ~ "^[a-zA-Z].*[a-zA-Z]$" && $NF !~ "name" || $NF ~ "c[0-9]+d[0-9]+$") print "/dev/"$NF}' /proc/partitions
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0awk '{if ($NF ~ "^[a-zA-Z].*[0-9]$" && $NF !~ "c[0-9]+d[0-9]+$" && $NF !~ "^loop.*") print "/dev/"$NF}' /proc/partitions
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This returns the hardware serial number. Dell calls this the "Service Tag" and it can be used to retrieve warranty information or used for RMA / repairs. Show Sample Output
0dmidecode -s system-serial-number -
This command sets the volume for the main PulseAudio "sink" (usually the ALSA output interface) to the maximum, 100% (the 0x10000 in the command). To set it to an arbitrary volume, replace 10000 with the volume you want times 100 (so 75% becomes 7500).
0pacmd set-sink-volume 0 0x10000 -
`mount -o remount` doesn't pick up new NFS options (eg. timeo, soft, retrans, etc) so you need to do a full mount/remount cycle. This one-liner makes it quick and easy :) Update your fstab with the new options, then run it. Show Sample Output
0for P in $(mount | awk '/type nfs / {print $3;}'); do echo $P; sudo umount $P && sudo mount $P && echo "ok :)"; done -
Execute commands serially on a list of hosts. Each ssh connection is made in the background so that if, after five seconds, it hasn't closed, it will be killed and the script will go on to the next system. Maybe there's an easier way to set a timeout in the ssh options...
0for host in $MYHOSTS; do ping -q -c3 $H 2>&1 1>/dev/null && ssh -o 'AllowedAuthe ntications publickey' $host 'command1; command2' & for count in 1 2 3 4 5; do sleep 1; jobs | wc -l | grep -q ^0\$ && continue; done; kill %1; done -
Cleaned up and silent with &>/dev/null at the end. Show Sample Output
0for host in $HOSTNAMES; do ping -q -c3 $host && ssh $host 'command' & for count in {1..15}; do sleep 1; jobs | wc -l | grep -q ^0\$ && continue; done; kill %1; done &>/dev/null - ‹ First < 5 6 7 8 9 > Last ›
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