# linescroll Installation: ``` git clone https://gitlab.com/edneville/linescroll.git cd linescroll cargo test && cargo build --release \ && please install -m755 target/release/linescroll /usr/local/bin ``` # running tail a log file to linescroll to report how many lines are flowing on average over a time period: ``` $ tail -F /var/service/tinydns/log/main/current | linescroll --noclear --speedonly 125/sec 125/min 125/5min 125/15min 123/sec 124/min 124/5min 124/15min 113/sec 120/min 120/5min 120/15min 136/sec 124/min 124/5min 124/15min 121/sec 123/min 123/5min 123/15min 124/sec 123/min 123/5min 123/15min 112/sec 122/min 122/5min 122/15min 111/sec 120/min 120/5min 120/15min 165/sec 125/min 125/5min 125/15min 132/sec 126/min 126/5min 126/15min 110/sec 124/min 124/5min 124/15min 99/sec 122/min 122/5min 122/15min 107/sec 121/min 121/5min 121/15min ``` linescroll can read from multiple files provided as filename arguments, optionally combining their stats. ``` $ linescroll \ /var/log/apache/access.log \ /var/service/tinydns/log/main/current 0/sec 5/min 1/5min 0/15min # 128 # # # # # # # # # # # # # # # #### 0 171/sec 179/min 188/5min 196/15min # 259 # ## # ### ### # ### # ### # ## ### # # # # # # ####### ################## ### ######### ### # ### ## ##### ############################################################ ############################################################ ############################################################ ############################################################ ############################################################ 0 ``` Bash sub-shell redirection allows a simple way to graph the number of processes. Below we use two while loops to show the number of processes that `ed` started and the number of processes on the system. ``` $ linescroll <( while true; do pgrep -u ed; sleep 1; done) <(while true; do pgrep -f .; sleep 1; done) ```